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Paolo Pizzol (Oak Ridge National Laboratory)MC4.A08: Superconducting RFPoster Presentation
This year SNS celebrates 20 years of operation and has reached the 2.0 MW power level after the PPU.
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This would merit an invited talk on the experience of this two decades of SRF cavity operation, the achieved reliability of the technology for high intensity SRF accelerators, the challenges and the lessons learned implemented in the PPU upgrade. -
Christopher Richard (Deutsches Elektronen-Synchrotron DESY)MC4.A01: Beam diagnosticsPoster Presentation
At the Photo-Injector Test facility at DESY in Zeuthen (PITZ), the horizontal and vertical phase spaces of electron beams are measured to characterize the performance of L-band photo-electron sources. These measurements are taken use a using the slit-screen method located 5.27 m downstream of the photo-cathode after acceleration to 18 MeV by a 14-cell booster cavity. The beamlet images from x...
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Mr Zehua Liang (Institute of Modern Physics, Chinese Academy of Sciences)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
To address the growing demand for high-power commercial electron irradiation, the Institute of Modern Physics (IMP) has developed a 100 mA, 4.6 MeV superconducting linac prototype. This compact facility features a conduction-cooled Nb3Sn SRF cavity (650 MHz, 5-cell, βopt=0.82) to drive high-intensity beams. However, the existing conventional DC gridded thermionic gun cannot provide the...
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429. A 16-Channel Wideband BPM for Transverse Profile and Temporal Distribution Measurements at RAONProf. Ji-Gwang Hwang (Kangwon National University)MC4.A01: Beam diagnosticsPoster Presentation
Non-destructive beam profile monitoring is a critical diagnostic capability for tuning modern heavy-ion accelerators. In this study, we present the design of a 16-channel wideband Beam Position Monitor (BPM) system for non-destructive transverse profile and temporal distribution measurements, specifically targeted for the ~10 MeV/u beamlines at the RAON heavy-ion accelerator facility. To...
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Yuxuan Yang (China Spallation Neutron Source)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The RF-Focused Interdigital linac (RFI) integrates the high shunt impedance of an IH-DTL with strong RF quadrupole focusing for compact low-energy ion acceleration. Current design codes, limited by idealized hard-edge approximations, neglecting soft-edge fringe fields and time-dependent focusing effects, which leads to beam envelope mismatch. To address these limitations, we present a novel...
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Dr Jibran Latif (Spallation Neutron Source Science Center)MC2.A06: Other electron acceleratorsPoster Presentation
A C-band parallel-coupled accelerating structure overcomes the RF breakdown limit by reducing filling time. Unlike conventional traveling-wave designs, this architecture feeds each cavity cell simultaneously through a parallel network of coupling irises, distribution waveguides, and a power divider, eliminating inter-cell power transit delays. The cavity geometry is optimized to maximize shunt...
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Xiaoyu Huang (Advanced Energy Science and Technology Guangdong Laboratory)MC4.A05: Other technologyPoster Presentation
Next-generation particle accelerators are strongly coupled, multiscale, and nonlinear systems in which local optimization alone cannot guarantee global stability. This paper proposes a complexity-native framework that treats the accelerator as a complex adaptive system rather than a set of independently optimized subsystems. This framework integrates three coupled layers—physical complexity,...
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Yongke Zhao (Zhangjiang Laboratory)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
In this report, we present a comprehensive redesign of the CLIC main beam injector complex for the 380 GeV energy stage. The main beam injector complex generates and accelerates electrons and positrons to 9 GeV at the end of the booster linac. Benefiting from the improved positron yield, the electron drive beam energy for positron production is reduced from 5 GeV to 2.86 GeV, and the electron...
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Zachary Liptak (Hiroshima University)MC2.A06: Other electron acceleratorsPoster Presentation
Because muons possess high material penetration capabilities, they are an extremely effective tool for non-destructive testing of large-scale structures. While cosmic-ray muons have traditionally been used for imaging infrastructure such as bridges and tunnels, as well as the interiors of buildings, challenges have included long measurement times and limitations on installation locations. In...
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Ouzheng Xiao (Institute of High Energy Physics, National Synchrotron Radiation Laboratory)MC4.A06: RF power sources and power couplersPoster Presentation
The next-generation large colliders, such as FCC and CEPC, propose unprecedented demands on the energy efficiency of radio-frequency (RF) power sources. For CEPC, whose RF system alone will require over 100 MW of wall-plug power, the 650 MHz / 800 kW continuous‑wave (CW) klystron is a mission-critical component. To meet this challenge, IHEP has launched a dedicated high-efficiency klystron...
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Ulrich Ratzinger (Bevatech GmbH)MC3.A05: RFQsPoster Presentation
An improved version of the 4-rod RFQ was developed to gain higher mechanical precision on the rod - alignment, and to reach a higher quality factor. Design elements as developed during a prototyping project within the Hessian funding initiative LOEWE3 were implemented in this project for the first time. This resulted in substantially reinforced rod-supports with complete dipole...
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Pablo Martinez Reviriego (European Organization for Nuclear Research)MC4.A07: Room temperature RFPoster Presentation
Pulsed high-power Radio Frequency (RF) systems frequently employ pulse compressors to augment peak output power, thereby reducing the required number of RF sources and enhancing cost-efficiency. A prominent class of these devices utilizes single resonant cavities supporting two degenerate modes to achieve high performance within a compact footprint. However, the inherent coupling of these...
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Ruiying Luo (Huazhong University of Science and Technology)MC2.A04: FELsPoster Presentation
In THz regime,superradiance with zero-slippage by introducing a waveguide can greatly enhance the energy conversion efficiency of electron beam. In this paper, a one-dimensional numerical code for waveguided superradiant THz FEL is developed. The code solves the beam–radiation interaction equations based on a frequency-domain method without employing the slowly varying envelope approximation...
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Apurva Gaikwad (Stony Brook University)MC1.A04 Plasma and wakefield accelerationPoster Presentation
Collective fields of the plasma provide focusing gradients far exceeding those of conventional quadrupoles, motivating the use of plasma lenses for strong beam focusing. Such strong focusing commonly arises in the blowout regime behind a driver, where the resulting ion channel functions as a natural plasma lens. Yet the natural cylindrical symmetry of such a structure introduces transverse...
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Hayk Sargsyan (Center for the Advancement of Natural Discoveries using Light Emission)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Optimization of beam transport systems in linear accelerators is a nonlinear and computationally intensive task due to the complex interdependencies between beam properties and machine parameters. In this work, a physics-motivated surrogate modeling approach is developed to optimize the processes of the best accelerator parameters exploration. The proposed framework approximates...
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Xueyi Xu (Institute of High Energy Physics)MC2.A04: FELsPoster Presentation
Coherent X-ray beams with energy above 50 keV have been found to have important applications in many research fields.
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The linac injector of the proposed Circular Electron-Positron Collider (CEPC), with electron energy up to 50 GeV, is a strong candidate for driving such high-energy X-ray free-electron lasers (XFELs).
In this work, we propose a SASE FEL scheme based on the CEPC linac.
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Sung-Woo Lee (Oak Ridge National Laboratory)MC4.A06: RF power sources and power couplersPoster Presentation
The Spallation Neutron Source (SNS) superconducting linac (SCL), including the recently added Proton Power Upgrade (PPU) cryomodules, powers each cavity through a coaxial fundamental power coupler with a ceramic RF window. Procurement, inspection, and high-power RF testing of ceramic windows are critical fabrication steps, yet pre-assembly characterization remains challenging. Motivated by PPU...
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TIANCAI JIANG (Institute of Modern Physics)MC4.A06: RF power sources and power couplersPoster Presentation
"The Institute of Modern Physics, Chinese Academy of Sciences (IMP, CAS) is scheduled to complete the construction of three superconducting linear accelerators (CiADS, HIAF, and IP-SAFE) between 2024 and 2026.These accelerators incorporate 7 types of superconducting cavities with operating frequencies ranging from 81.25 MHz to 650 MHz, 10 types of cryomodules, and nearly 400 power couplers in...
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Shriraj Kunjir (Facility for Rare Isotope Beams)MC4.A04: Low level RFPoster Presentation
The FRIB LLRF controller was developed as a flexible hardware platform for multiple cavity types operating at six RF frequencies from 40.25 to 322 MHz. Key choices—direct RF sampling, compatible footprints for frequency-dependent RF components, common PCB form factors, and spare RF, analog, and digital I/O—enabled reuse across diverse systems. The platform supports several tuner technologies,...
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Mikhail Vladimirov (National Research Nuclear University MEPhI)MC2.A02: Electron linac projectsPoster Presentation
The fourth generation synchrotron radiation facility SYLA (Synchrotron&Linac) is now under development at the NRC “Kurchatov Institute”. SYLA will be driven by a 6 GeV electron linear accelerator that will operate both as the injector for the synchrotron and as the driver for free electron lasers. The prototyping of the accelerating structure for the linac has been completed now. The geometry...
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xin tong (China Spallation Neutron Source)MC4.A05: Other technologyPoster Presentation
Neutron scattering has proven to be one of the most powerful methods for the investigation of structure and dynamics of materials on atomic length scales and time scales. Recently, the neutron science community faces a decline of sources for neutrons with research reactors shutting down. Consequently, the limited numbered large-scale accelerator-based neutron sources play more important roles...
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xin tong (China Spallation Neutron Source)MC4.A05: Other technologyPoster Presentation
Neutron scattering has proven to be one of the most powerful methods for the investigation of structure and dynamics of materials on atomic length scales and time scales. Recently, the neutron science community faces a decline of sources for neutrons with research reactors shutting down. Consequently, the limited numbered large-scale accelerator-based neutron sources play more important roles...
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Dr Paul Winkler (Deutsches Elektronen-Synchrotron DESY)MC1.A04 Plasma and wakefield accelerationPoster Presentation
Here we report the generation of a laser-plasma electron beam using active energy compression. Using a magnetic chicane, the electron bunch is first stretched longitudinally to imprint an energy correlation, which is then removed with an active RF cavity. The resulting energy spread and energy jitter are reduced by more than an order of magnitude to below the permille level, meeting the...
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Julius Storch (Goethe University Frankfurt)MC3.A05: RFQsPoster Presentation
Additive manufacturing (AM) offers new possibilities for the design and fabrication of radio-frequency quadrupoles (RFQs), particularly in enabling complex internal geometries that are difficult or impossible to realize with conventional machining. In this work, the application of AM to the production of 4-rod RFQ structures made from pure copper and copper alloys is investigated.
A key...
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Jinghe Yang (China Institute of Atomic Energy)MC2.A05: Industrial and medical acceleratorsPoster Presentation
Non-destructive testing is one of critical areas of industrial application for radiation technology, widely used in pressure vessel inspection, and cargo inspection. Electron linear accelerators play a pivotal role in these applications by generating X-rays through hitting the target by electron beam. To meet the evolving demands of non-destructive testing, research has been conducted on...
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Yun Liu (Oak Ridge National Laboratory)MC4.A01: Beam diagnosticsPoster Presentation
This talk will review current state of development of various applications using lasers for manipulating H- ion beams in accelerators. The talk will cover wide range of applications: beam diagnostics, laser assisted charge exchange injection, manipulation of temporal beam structure and others.
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Dr Sergey Kuzikov (Thomas Jefferson National Accelerator Facility)MC2.A02: Electron linac projectsPoster Presentation
We propose an AI-driven control architecture that maintains resonance between magnetrons and SRF cavities, enabling efficient accelerator operation. Injection locking is achieved by extracting pick-up signals from normal-conducting cavities integrated into a beamline with the main SRF cavities; a bunched electron beam excites these resonators, providing decoupled RF power to phase-lock the...
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Francesco Grespan (Istituto Nazionale di Fisica Nucleare)MC3.A06: Room temperature structuresPoster Presentation
DTL is a very well known and smart accelerator structure. Has figh shunt impedance because operating in the fundamental mode of a cylinder, short focusing period and solid beam dynamics with internal quadrupoles, field stabilization with post couplers. In the last years new high power DTLs have been realized. ESS DTL is the most powerful ever built and has been recently commissioned; new...
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Ziga Kroflic (Cosylab)MC4.A01: Beam diagnosticsPoster Presentation
A control and acquisition system for ionization profile monitor (IPM) stations at GSI/FAIR has been implemented and deployed, providing real-time, simultaneous transverse beam characterization in both planes without disturbing the beam. Built on FESA (Front-End Software Architecture), the system uses dedicated classes to manage the cameras, high-voltage control, and digital I/O. Image...
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Yasuhiro Fuwa (Japan Atomic Energy Agency)MC4.A06: RF power sources and power couplersPoster Presentation
The J-PARC Linac provides a high-intensity proton beam for use in a spallation neutron source, neutrino production, and hadron experiments. To accelerate the beam to 400 MeV, the J-PARC Linac uses 45 klystrons as its primary high-power radiofrequency (RF) source. This presentation reports on the operational statistics and failure cases of these RF sources over the past few years, as well as...
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Hao Hu (Huazhong University of Science and Technology)MC2.A02: Electron linac projectsPoster Presentation
In the Super Tau-Charm Facility (STCF) Main Linac, intense short-range longitudinal wakefields from high-charge bunches cause severe energy spread degradation and nonlinear longitudinal phase space (LPS) distortions. We present an analytical model describing LPS evolution under RF acceleration, wakefields, and longitudinal space charge. By utilizing an equivalent truncated-Gaussian...
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Ilia Pavlov (ITMO University)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
While conventional experiments typically employ plane-wave states of particles with definite momenta, vortex states represent cylindrical waves carrying an orbital angular momentum (OAM) projection along the propagation direction. This projection can be arbitrarily large, granting charged particles magnetic moments orders of magnitude greater than those of plane-wave states. Consequently,...
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Dr Youming Deng (University of Science and Technology of China)MC4.A01: Beam diagnosticsPoster Presentation
The Hefei Infrared Free Electron Laser (HiFEL) is a user facility built by the University of Science and Technology of China, dedicated to energy chemistry research. The facility operates in a special mode: a macro-pulse with a variable repetition rate of 1 Hz to 10 Hz contains micro-pulses with variable repetition rates of 29.75/59.5/119/238 MHz, and the macro-pulse width is on the order of...
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Jiapeng Li (Huazhong University of Science and Technology)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The ability to resolve electronic motion on attosecond timescales is central to advancing ultrafast science. Ultrafast electron diffraction (UED) with attosecond electron pulses offers a direct route to this goal, yet generating such pulses at relativistic energies remains challenging. Here, we investigate a two-color laser modulation scheme for producing attosecond electron pulse trains via...
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Jiapeng Li (Huazhong University of Science and Technology)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Ultrafast electron diffraction (UED) provides atomic-scale access to transient structural dynamics, yet its temporal resolution is fundamentally constrained by finite electron bunch durations and pump–probe timing jitter. We introduce a THz-streaking approach that overcomes these limitations by using a high-gradient (~1 GV m⁻¹) THz deflecting field synchronized with the diffraction process....
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Stephan Wagner-Rossel (Goethe University Frankfurt)MC4.A07: Room temperature RFPoster Presentation
RF-conditioning is an essential pre-processing step of all normal conducting cavities. This time-intensive work can pose great risks to equipment and cavity if conditioning-effects such as multipacting, discharges or degassing aren’t taken seriously.
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To reduce the workload for human personnel, it was proposed to develop a deep-learning based algorithm to conduct conditionings on its own.... -
Taras Bondarenko (National Research Nuclear University, Research and Production Company Laplace)MC4.A01: Beam diagnosticsPoster Presentation
The SYLA fourth-generation synchrotron radiation source is currently being developed at the National Research Centre “Kurchatov Institute”. Within this project, NRNU MEPhI is responsible for the design of the electron injector linac. The Prototype Accelerating Structure (PAS), which is now under construction at MEPhI, is intended to validate technical solutions for the full-scale 6 GeV...
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Chanmi Kim (Institute for Basic Science)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The design of low-energy beam transport (LEBT) lines involves high-dimensional optimization under multiple physical constraints, including beam size, transmission efficiency, and limited beamline geometry. In the RAON injector system, the integration of a new 14.5 GHz ECR ion source requires re-optimization of the beam transport line while maintaining compatibility with the existing injector...
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Gilles Jacopo Silvi (Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Beam-Based Alignment studies are fundamental for ensuring accurate beam transport along the linac up to the plasma stage. Misalignments of quadrupoles and RF structures can induce trajectory distortions, leading to emittance dilution and enhanced susceptibility to wakefields. Proper modeling and correction of these misalignments are critical to preserving beam quality. In plasma acceleration,...
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Mariya Arsentyeva (Synchrotron Radiation Facility — Siberian Circular Photon Source «SKIF» Boreskov Institute of Catalysis)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Linear accelerator of the SKIF Synchrotron Radation Facility (SRF SKIF) was sucessfully commissioned in 2025. It provides the electron beams with the energy of 200 MeV for the subsequent injection to the booster synchrotron. Being an initial part of the SRF SKIF, the linear accelerator includes not only the key components, such as the electron gun, accelerating structures and magnet elements,...
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Dr Thakonwat Chanwattana (Synchrotron Light Research Institute)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The Siam Photon Source II (SPS-II) project is developing a 270-MeV injector linac based on the proven technology of the NanoTerasu facility. This paper presents the beam dynamics simulations and optics matching for the injector linac and the subsequent Low-Energy Beam Transport line (LBT). Particle tracking through the thermionic electron gun, sub-harmonic cavities, and S-band accelerating...
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Dmitry Kayran (Brookhaven National Laboratory)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The Electron-Ion Collider at Brookhaven National Laboratory requires high-current, high-brightness electron beams for efficient ion beam cooling. We present the design and beam dynamics optimization of a normal-conducting electron linac for the Low-Energy Cooler (LEC), building on operational experience from the Low Energy RHIC Electron Cooler (LEReC) and extending performance toward the...
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Zihe Gao (Shanghai Synchrotron Radiation Facility)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
A fully automated beam dynamics design method based on genetic algorithm is proposed for a 15 GHz X-band three-cell standing wave accelerating structure to meet the miniaturization requirements of X-ray based intraoperative radiotherapy devices. The genetic algorithm simultaneously optimizes the field distribution and phase relationships of the three cavities, achieving both electron beam...
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jing fang (China Institute of Atomic Energy)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The China Institute of Atomic Energy proposes an H2+ high-current separated-sector cyclotron facility as a continuous neutron source, targeting a 150 MeV, 10 mA proton beam after stripping extraction. The RFQ front end is designed for pre-acceleration and injection matching into the second-stage cyclotron. The matching requirements include low-loss transport through the RFQ and transfer line,...
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Ms Man Yi (Advanced Energy Science and Technology Guangdong Laboratory)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Beam loss is a critical challenge in the physics design of high power superconducting proton linacs. The challenge is even more acute in linacs that feature high peak intensity and low energy, which has strong space charge effect and RF nonlinear force. In this paper, we study how to achieve a high transmission rate for beam halo particles, commonly a major source of beam loss, via beam halo...
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Dr Thakonwat Chanwattana (Synchrotron Light Research Institute)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The Siam Photon Source (SPS) injector, comprising a pre-injector linac and a low-energy beam transport line (LBT), delivers a 40 MeV electron beam to a booster synchrotron for acceleration to 1.2 GeV. While this system has operated in its original configuration since commissioning, prior machine studies (in 2006 and 2016) revealed that overall beam transmission efficiency had degraded to below...
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Mr Tarik Ventorini de Oliveira (Brazilian Center for Research in Energy and Materials, Universidade Estadual de Campinas (UNICAMP))MC3.A04: Proton linac projectsPoster Presentation
The Brazilian Center for Research in Energy and Materials (CNPEM) has initiated a proton linear accelerator development program aimed at broadening its expertise in accelerator technologies to enable future applications in radioisotope production and proton therapy. As a first step in this initiative, a 1 MeV Proton Radio Frequency Quadrupole (RFQ) operating at 476 MHz was designed,...
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Dr Eunhun Im (Institute for Basic Science)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
The RAON 14.5 GHz ECR ion source has been used for beam conditioning and beamline commissioning with relatively lighter-mass ion beams such as Argon and Neon. As demand for beams with various A/q values has recently increased, the operational range of the ion source has needed to be extended to heavier noble gas beams such as krypton (Kr) and xenon (Xe). In ECR ion source operation, the...
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Yuri Batygin (Los Alamos National Laboratory)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Operation of a high-intensity accelerator requires careful control of beam losses. Among all phenomena affecting the beam, the impact of misalignment of the LANSCE beam channel on beam dynamics has not been studied systematically. Laser tracker measurement of misalignment of the accelerating channel was done by the Mechanical Design Engineering Group of the Los Alamos Accelerator Operations...
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Hooman Hassanzadegan (European Spallation Source)MC4.A01: Beam diagnosticsPoster Presentation
The European Spallation Source (ESS) employs 266 ionization chamber beam loss monitors (icBLMs) and 76 neutron beam loss monitors (nBLMs). These detectors provide detailed information on beam loss distribution along the ~550 m ESS linac and play a critical role in machine protection and personnel safety. During the second round of beam commissioning to the Tuning Beam Dump in spring 2026,...
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guangxian li (Institute of Modern Physics)MC3.A06: Room temperature structuresPoster Presentation
Conventional linacs operated at the zero synchronous phase offer high acceleration efficiency but usually lack intrinsic transverse focusing, requiring additional magnetic elements and increasing system complexity, size, power consumption, and cost. We propose a novel beam-dynamics concept, Simultaneous zerO-phase Focusing and Acceleration (SOFA), based on planar accelerating electrodes....
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Aodhan McIlvenny (Lawrence Berkeley National Laboratory)MC2.A02: Electron linac projectsPoster Presentation
BeamNetUS is a collaborative user network of twelve beam test facilities spanning six U.S. Department of Energy national laboratories, dedicated to advancing particle accelerator research, technology development, and applications. Through an annual open call for proposals, BeamNetUS invites exploratory research aimed at seeding new collaborations and fostering innovation across the accelerator...
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Dou Wang (Institute of High Energy Physics, Chinese Academy of Sciences)MC2.A01: CollidersPoster Presentation
IHEP is exploring potential schemes for BEPCII to adopt the crab-waist scheme to further increase luminosity and conduct relevant experimental research. Considering that BEPCII is an existing machine, the upgrade and modification must accommodate the existing tunnel geometry and detector spatial arrangement. It is preferable to make only local adjustments or modifications to the lattice. We...
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Minseo Jung (Pohang University of Science and Technology)MC2.A06: Other electron acceleratorsPoster Presentation
Ultrafast Electron Diffraction (UED) is an imaging technique used to observe the atomic structure of matter and its dynamics through the scattering of a pulsed electron beam.
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The performance of a UED beamline depends on electron beam parameters such as beam size, bunch length, bunch charge and beam energy which are affected by UED machine parameters including strength of solenoid and RF... -
Mikhail Vladimirov (National Research Nuclear University MEPhI)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
Pico- and subpicosecond electron bunches with low transverse emittance and charges up to hundreds of picocoulombs, routinely generated in high-gradient RF photoguns, are essential for high-brightness light sources. Photoemission governs the initial bunch properties and is central to forming high-brightness beams. Classical photoemission models (Spicer and Fowler–DuBridge) do not always...
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Alexander Plastun (Facility for Rare Isotope Beams)MC3.A02: Ion linac projectsPlenary Talk (Invitation Only)
Heavy ion linacs use charge stripping to increase accelerating efficiency. At FRIB, the charge selector intercepts unwanted charge states from their broad distribution after stripping at the energies of 17-20 MeV/u. Design of a movable collimator for high-power heavy ion beams becomes very challenging due to high volumetric power deposition, radiation damage, radioactivation, and mechanical...
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Hao Guo (Institute of Modern Physics, Chinese Academy of Sciences)MC4.A03: Industrial developmentsPoster Presentation
In July 2025, all superconducting cavity strings for the Heavy Ion Accelerator Facility (HIAF) were successfully delivered after a strict cleanroom assembly process. Supported by a rigorous process quality management system, this work achieved zero-defect physical delivery and met the accelerator’s performance requirements. A small number of unexpected issues, such as helium tank leakage, were...
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Yasaman Yousefi Sigari (TRIUMF)MC2.A02: Electron linac projectsPoster Presentation
Accelerator-based sources of coherent terahertz radiation provide a promising route to high peak and high average power emission in a spectral region that remains challenging for conventional technologies. At TRIUMF, the existing electron linac is being upgraded as a flexible platform for broadband coherent THz generation.
We report the second experimental observation of coherent THz...
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Arohi Jain (Stony Brook University)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
In recent years, plasma accelerators have advanced significantly toward producing beams suitable for colliders, aiming to replace conventional MV/m RF fields with GV/m fields of nonlinear plasma waves. Realizing a plasma-based collider requires electron bunches with high charge (hundreds of pC), low normalized emittance (~100 nm), and energy spread below 1%. Minimizing energy spread during...
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Lei Du (Institute of High Energy Physics)MC2.A02: Electron linac projectsPoster Presentation
The Beijing Electron Positron Collider II (BEPCII) is a key large scientific installation for high-energy physics research in China, with its linear accelerator (Linac) serving as the core injector system responsible for generating and accelerating high-quality electron/positron beams to the designed energy for collider operation. Recently, this linac has been updated to serve as a...
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Anders Svensson (European Spallation Source)MC4.A04: Low level RFPoster Presentation
A LLRF talk focussing on the overall Hardware and Software LLRF status and performances, procedures for closed loop operation, learning algorithm for the compensation of the large LFD with long pulses (3.2 ms) using piezos and adaptive FF learning algorithms for beam transient compensation. .
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80. Commissioning of the first HElmholtz LInear ACcelerators (HELIAC) cryomodule with heavy ion beamMaksym Miski-Oglu (GSI Helmholtz Centre for Heavy Ion Research)MC3.A02: Ion linac projectsPoster Presentation
The superconducting heavy ion HELmholtz LInear ACcelerator (HELIAC) is designed to meet the needs of the Super Heavy Element (SHE) research and material sciences user programs at GSI in Darmstadt. The HELIAC is planned for construction at GSI in Darmstadt. The beam energy can be varied smoothly between 3.5 and 7.3 MeV/u, with an average current of up to 1 emA and a duty cycle of 100 %....
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Deeksha Sinha (Northern Illinois University)MC4.A07: Room temperature RFPoster Presentation
An RF kicker is being developed to mitigate high-charge bunch tails that can induce quenches in the superconducting magnets of the Argonne Tandem Linear Accelerator System (ATLAS). Building on previous design, the dual-harmonic kicker incorporates an additional harmonic mode to minimize the kick to the bunch core while maintaining effective tail removal. The resonant structure has been...
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Jiyoung Choi (Pohang University of Science and Technology)MC4.A01: Beam diagnosticsPoster Presentation
Precise 4-dimensional (4D) transverse phase space characterization is essential for fully understanding and controlling coupled beam dynamics and beam quality. The Virtual Pepper-Pot (VPP) method has been proposed to reconstruct the 4D transverse phase space, including transverse coupling information, from slit-based measurements. However, the finite slit width imposes intrinsic limitations on...
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Adler Weismantel (Los Alamos National Laboratory)MC3.A01: Industrial and medical acceleratorsPoster Presentation
The reliability of high-voltage Cockcroft-Walton injector systems is strongly dependent on the performance of insulating structures operating in SF₆ environments. This work presents a comprehensive study of the refurbishment and breakdown mitigation of an SF₆-insulated acrylic jacket in a 750 keV Cockcroft-Walton injector system that exhibited persistent arc-down events due to surface...
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Alexander Malyzhenkov (European Organization for Nuclear Research)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Second beam line has recently been installed and commissioned at CLEAR (CERN Linear Accelerator for Research). The line begins with a switchyard consisting of two dipole bending magnets that offset the beam from its original path, along with quadrupoles and sextupoles placed between the bends to close the first- and second-order dispersion, respectively. In this work, based on analytical...
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Jeongil Heo (Institute for Basic Science)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
RAON (Rare Isotope Accelerator for ON-line experiment) is a heavy-ion accelerator developed through the Rare Isotope Science Project (RISP) from 2011 to 2023, and has been providing beams to users since 2024. Currently, stable isotope beams such as argon, oxygen, neon, and other ion species are supplied using an Electron Cyclotron Resonance Ion Source (ECRIS). In addition, radioactive isotope...
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Ruichuang Qin (Shanghai Institute of Applied Physics)MC3.A03: Other proton/ionPoster Presentation
A compact 2.45 GHz ECR ion source that utilizes a rotating electric field is under development. An RF rotator is employed for the first time in the field of ion sources to couple microwave power into the plasma chamber and excite an intrinsically rotating electric field. The rotating direction of the electric field is designed to be consistent with the electron cyclotron motion in the magnetic...
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Takafumi Hara (High Energy Accelerator Research Organization)MC2.A02: Electron linac projectsPoster Presentation
Under MEXT Advanced Accelerator element Technology Development (ATD) program, a prototype ILC cryomodule (CM) is being designed and manufactured at KEK. The CM consists of eight 9-cell superconducting cavities, magnetic shields, power couplers, frequency tuners, a thermal shield, cooling pipes, and a superconducting magnet for beam focusing.
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Due to the large number of components and strict... -
Mathieu Omet (High Energy Accelerator Research Organization)MC4.A02: Cryomodules and cryogenicsPoster Presentation
Within the framework of the MEXT-ATD program and the ILC Technology Network (ITN), an ILC prototype cryomodule is presently being designed and assembled at KEK. The module will comprise eight superconducting 9-cell 1.3 GHz TESLA cavities. In parallel, the necessary infrastructure for cryomodule testing and operation is being set up. This contribution presents the current status of the...
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Stephen Milton (TAU Systems, Inc.)MC1.A04 Plasma and wakefield accelerationPoster Presentation
Substantial work has been dedicated towards using LPAs to drive free-electron lasers (FELs) for a broad range of applications. Despite recent breakthroughs, which have proven the fundamental feasibility of operating FELs with an LPA source, stable FEL operation over multiple hours without operator input had yet to be achieved. We report significant improvements to the stability of a hundred TW...
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Junyeong Jeong (Ulsan National Institute of Science and Technology)MC1.A04 Plasma and wakefield accelerationPoster Presentation
Control of the longitudinal plasma density profile is critical for optimizing laser–plasma accelerator performance, especially for injection in confined plasma channels. To address this, we propose a segmented capillary discharge plasma source and its underlying flow-control framework for generating controlled plasma density down-ramps, and demonstrate its validation theoretically and...
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Kenji Yasutome (RIKEN SPring-8 Center)MC4.A07: Room temperature RFPoster Presentation
We have been developing an X-band transverse deflector system (X-TDS) with 1 fs time resolution at a deflecting voltage of 80 MV for 8 GeV electron at SACLA, to investigate longitudinal electron beam structures for both SASE and sub-femtosecond XFEL operations, with ongoing efforts toward machine learning–based diagnostics. Longitudinal electron beam structures critically determine XFEL pulse...
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Ayomikun Emmanuel Temiloluwa Akintola (Science and Technology Facilities Council, ASTeC, STFC Daresbury Laboratory)MC4.A02: Cryomodules and cryogenicsPoster Presentation
UKRI-STFC Daresbury Laboratory operates a flexible vertical test facility (VTF) for testing superconducting radio-frequency (SRF) cavities. Thanks to a series of expansion and upgrade activities, including a new cavity test insert, improved magnetic hygiene, and increased cooldown rate (principally to facilitate residual magnetic flux expulsion), the facility is now capable of testing a single...
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Feng Bai (Institute of Modern Physics)MC4.A02: Cryomodules and cryogenicsPoster Presentation
The QWR/HWR/Elliptical cavity cryomodules have been developed for proton and heavy-ion linacs at the Institute of Modern Physics (IMP) of the Chinese Academy of Science (CAS). In this paper, the development situation of the cryomodules for IMP has been reported. The application of some specific design effectively improves the commissioning performance of the cryomodule. These cryomodules are...
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Cheng Wang (Shanghai Synchrotron Radiation Facility)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
High-gradient photocathode electron guns, serving as electron sources for advanced linear light sources, have been fully validated to enhance the overall performance of the system. As cryogenic electron guns emerge as the future trend for ultra-compact electron sources, the extremely high electric fields within the cavity induce significantly stronger dark currents. This paper simulates this...
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Woohyeong Kim (Gangneung–Wonju National University)MC4.A01: Beam diagnosticsPoster Presentation
Precise measurement of the 4D phase-space distribution (x, x', y, y') is essential for optimizing accelerator performance and ensuring stable operation. However, the prolonged measurement time of traditional scanning-based diagnostics limits their application in real-time tuning. In this study, we propose a deep learning-based surrogate model for the rapid reconstruction of heavy-ion beam...
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Zheng Wang (Shanghai Advanced Research Institute, Chinese Academy of Sciences)MC4.A08: Superconducting RFPoster Presentation
Surface defects (e.g., contaminants, scratches, pits) introduced during the processing and welding of superconducting cavities can degrade cavity performance and yield, thereby limiting the surface treatment throughput of the Wuxi platform and hindering the construction progress of the SHINE project. To address this issue, extensive defect repair efforts have been carried out. Techniques such...
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Xiaonan Du (GSI Helmholtz Centre for Heavy Ion Research)MC4.A04: Low level RFPoster Presentation
Experimental mapping of the electric field of a cavity is usually through bead-pull measurements. These require quite long times to align the bead and are generally restricted to the beam axis. Here, the bead has been replaced by drops of liquid falling through the cavity. Together with efficient compression and noise reduction techniques, the method allows for fast and precise measurements....
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Mikhail Gorbunov (National Research Nuclear University MEPhI)MC2.A07: Synchrotron light sourcesPoster Presentation
A low-emittance magnetic bunch compressor is being developed for the injector of the SILA 4th generation synchrotron light source. The target beam parameters are 250 MeV beam energy, 300 pC bunch charge, and an initial bunch duration of about 7 ps. Under these conditions, bunch compression is strongly affected by coherent synchrotron radiation (CSR), longitudinal space charge, and optics...
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Huan Jia (Institute of Modern Physics, Chinese Academy of Sciences)MC3.A04: Proton linac projectsPoster Presentation
IP-SAFE is an isotope production facility based on superconducting linac located at Lanzhou. The facility is composed of a 115 MeV, 2 mA proton superconducting linac, two target stations, a chemical speration system, radioactive waste treatment systems and auxiliary support systems. The superconducting linac is designed and constructed in last 3 years. In the talk, the design, construction,...
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Heetae Kim (Institute for Basic Science)MC4.A02: Cryomodules and cryogenicsPoster Presentation
The pre-production development of the single-spoke resonator 2 (SSR2) cavity and its associated cryomodule is underway for the superconducting linear accelerator (SCL2) at RAON. This research presents the main design parameters of the SSR2 cavity, along with analyses of the electric and magnetic field distributions. The designs of the frequency tuner and fundamental power coupler are also...
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Ki Taek Son (Institute for Basic Science)MC4.A06: RF power sources and power couplersPoster Presentation
The Superconducting Linac 3 (SCL3) of the RAON heavy ion accelerator uses quarter wave resonator (QWR) cavities at 81.25 MHz and half wave resonator (HWR) cavities at 162.5 MHz. Each cavity is driven by a dedicated 4 kW solid state power amplifier (SSPA). This paper presents the design and fabrication of a domestically developed spare SSPA unit for SCL3. The amplifier uses six 900 W power...
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Dr Donghyun Kwak (Korea Atomic Energy Research Institute)MC4.A01: Beam diagnosticsPoster Presentation
The Advanced Radiation Technology Institute (ARTI) of the Korea Atomic Energy Research Institute (KAERI) operates the RFT-30 cyclotron, which extracts proton beams up to 30 MeV for medical radioisotope production and neutron experiments. For stable beam operation, real-time monitoring of the beam position after acceleration is essential. Beam loss caused by collision with the beam pipe or...
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Mr Chenyu Ji (Huazhong University of Science and Technology)MC2.A04: FELsPoster Presentation
In a THz FEL oscillator, the undulator and optical cavity are the key components for radiation. In this paper, we present an integrated optimization of the systematical parameters under the requirement of high compactness. The joint influence of the undulator and resonator on the FEL performance introduces a multi-parameter coupling that complicates the design. To address this, we simplify the...
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Dr Cai Meng (Chinese Academy of Sciences)MC2.A02: Electron linac projectsPoster Presentation
Beam-driven plasma wakefield acceleration (PWFA) holds considerable promise for next-generation electron-positron colliders and high-energy free-electron lasers, owing to its ultrahigh accelerating gradients. To address fundamental physics and technical challenges associated with both electron and positron acceleration in PWFA, the Institute of High Energy Physics (IHEP) has established a...
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Zahra Pouyanrad (Amirkabir University of Technology)MC2.A05: Industrial and medical acceleratorsPoster Presentation
A 6 MeV S-band radiofrequency accelerating cavity has been designed and simulated for compact medical linear accelerators, particularly for intraoperative radiotherapy systems. The π/2-mode standing-wave structure operates at a frequency of 2.998 GHz. It was optimized through three-dimensional electromagnetic simulations using CST software to attain a high accelerating gradient, efficient...
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geonwook park (Korea University of Science and Technology)MC2.A06: Other electron acceleratorsPoster Presentation
A compact microtron accelerator has been developed as an electron source for a THz free-electron laser (FEL). The microtron scheme is adopted to realize a highly compact THz FEL system compared with conventional FEL facilities. The accelerator employs a 2.8 GHz magnetron with a peak power of 2.5 MW. In this work, the design and beam dynamics of the microtron are presented with emphasis on the...
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Buse Naz Temizel Ozdemir (Northern Illinois University)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
A project is underway to explore the generation of sub-micron longitudinal beam modulations—with the long-term goal of building a compact X-ray source. Our system uses a transmission electron microscope (TEM) grid to impose a transverse density modulation on the initial beam, and an emittance exchange (EEX) beamline to convert that transverse modulation into a longitudinal modulation. However,...
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Namseok Go (Pohang Accelerator Laboratory)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
The Korea-4GSR injector requires a highly stable and precisely synchronized laser pulse train system for multi-bunch operation of the photocathode RF gun. To support this requirement, a laser system capable of generating nanosecond-interval pulse trains with femtosecond-level timing synchronization is being designed.
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The proposed system employs a beam-split, delay, and recombination scheme to... -
Khaled Gad (Sungkyunkwan University)MC3.A01: Industrial and medical acceleratorsPoster Presentation
The design of a superconducting cyclotron magnet, especially intended for high-energy applications such as a 350MeV/u hadron therapy cyclotron for carbon ions ( ^12 C^(6+) ), demands stringent control over the magnetic field profile. The magnet must strictly adhere to an isochronous field distribution to maintain a constant ion revolution frequency despite relativistic mass increases during...
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Aaron English (Carleton University, Soleinium Corp.)MC3.A02: Ion linac projectsPoster Presentation
This work details the design and construction of a low energy linear accelerator being built for measurement of fusion reaction cross sections at energies <100 keV.
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The accelerator uses an in-house designed inductively coupled plasma source to supply a proton beam of up to 1 mA at a target and beam extraction and transport are simulated using the C++ library IBSIMU.
To cover both crystalline... -
hengjun cao (Institute of High Energy Physics)MC4.A07: Room temperature RFPoster Presentation
This work presents the design, simulation, and validation plan of a C-band spherical pulse compressor for the CEPC linac. The study is based on the RF power scheme in which one 80 MW klystron drives four accelerating structures. To meet this requirement, the compressor is designed to achieve an energy multiplication factor of M ≥ 1.9, enabling stable operation at 64 MW input power and...
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Meifei Liu (Institute of High Energy Physics)MC4.A06: RF power sources and power couplersPoster Presentation
To satisfy the beam power upgrade from 100 kW to 500 kW for the China Spallation Neutron Source Phase II (CSNS-Ⅱ), 30 sets of high-efficiency and miniaturized P-band (324 MHz/648 MHz) klystrons will be deployed for the linear superconducting accelerator, with the development of fully domestic klystrons initiated. Traditional P-band single-beam klystrons adopt double-reentrant cylindrical...
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Zhongshan Li (Institute of Modern Physics)MC3.A05: RFQsPoster Presentation
A new radiofrequency quadrupole (RFQ) accelerator has been designed for ion therapy at the Institute of Modern Physics, Chinese Academy of Sciences. This RFQ, operating at 162.5 MHz, accelerates carbon ions to 0.8 MeV/u. To achieve a compact RFQ with high beam transmission efficiency, an adiabatic capture design and an equal-separatrix-area technique were employed in beam dynamic design. To...
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Peng Liu (Chinese Academy of Sciences)MC4.A05: Other technologyPoster Presentation
The upgrade of Beijing Electron–Positron Collider (BEPCII) is a double-ring machine used for both high-energy physics experiments and synchrotron radiation research.In order to further improve the performance of the machine, BEPCII has upgraded the brightness in the high-energy zone (BEPCII-U). As a key system in BEPCII-U, the fast Kicker pulse power supply system for storage ring injection is...
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Minseo Jung (Pohang University of Science and Technology)MC4.A08: Superconducting RFPoster Presentation
An energy recovery linac (ERL) is an accelerator in which electron bunches are decelerated in the linac after generating radiation to recover their energy. Through this process, the ERL can achieve high energy efficiency while maintaining a high beam current. Due to these advantages, the ERL is an attractive candidate for a next-generation extreme ultraviolet (EUV) light source in lithography....
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Seok Ho Moon (Korea Multi-purpose Accelerator Complex)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The Korea Multi-purpose Accelerator Complex (KOMAC) in Gyeongju, currently operates a 100 MeV high-current proton linear accelerator. This facility actively supports a wide range of applications, including semiconductor radiation testing and fundamental scientific research. Recently, a upgrade plan has been initiated to upgrade the maximum beam energy to 200 MeV to meet increasing user...
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Guoxin Chen (Institute of Modern Physics, Chinese Academy of Sciences)MC3.A06: Room temperature structuresPoster Presentation
A high-intensity rapid-cycling accelerator facility to produce the medical isotope products is proposed in China. To meet the injection requirements of the rapid-cycling synchrotron, an H-mode DTL structure with transverse focusing is adopted to compensate the space-charge effect and maintain high beam quality. In this paper, the physical design of the drift tube linac (DTL) is presented. A...
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Sang-Hee Kim (Pohang Accelerator Laboratory)MC2.A04: FELsPoster Presentation
Prototype kicker power supplies have been designed for the storage ring beam injection of the Korea 4th generation storage ring (Korea-4GSR). The kicker power supplies drive four bump magnets to maintain field balance and synchronized kick of the beam. The pulsed magnetic field of kickers should be synchronized within a timing jitter of 5 ns and an amplitude difference of ± 0.2%. To fulfill...
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Yongke Zhao (Zhangjiang Laboratory)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The FCC-ee injector complex is mainly composed of an electron source, a positron source, a damping ring, and a high-energy linac. The positron linac, which is part of the positron source, accelerates the positron beams from about 200MeV to 2.86 GeV before their injection to the damping ring. It is designed, simulated and optimized for the best positron beam performance at the end of the linac...
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Changsun Na (Pohang University of Science and Technology)MC4.A01: Beam diagnosticsPoster Presentation
The longitudinal bunch shape is important for beam dynamics and accelerator optimization. In our previous study, a capacitive pick-up type bunch shape monitor (CPU-BSM) was developed for nondestructive measurement of nonrelativistic ion-beam bunch shapes. However, beamline applications may require a larger aperture due to beam size, alignment tolerances, and installation constraints. In this...
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Xiaoxia Huang (Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences)MC3.A04: Proton linac projectsPoster Presentation
A 2.45 GHz microwave proton source has been designed, fabricated, and tested on a laboratory test bench. The source utilizes an electromagnetic structure for electron cyclotron resonance (ECR) plasma generation. After careful assembly and vacuum conditioning, the beam commissioning was carried out. A Faraday cup installed at the beamline end was used to measure the extracted proton current. A...
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Fu Ma (Institute of Modern Physics, Chinese Academy of Sciences)MC3.A02: Ion linac projectsPoster Presentation
The normal temperature drift tube linac, serving as an injector for medical synchrotrons, is typically based on APF and KONUS beam dynamics within IH-mode cavities to achieve cost-effectiveness and operational stability. While the APF structure combines acceleration and focusing through phase adjustment, its relatively low accelerating gradient results in a lengthy cavity. Conversely, the...
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Dr Hai Zheng (Institute of Modern Physics)MC4.A05: Other technologyPoster Presentation
The migration from hardwired interlocks to packet-based networks in high-power accelerators (e.g., White Rabbit) raises a certification challenge: safety-class machine protection systems require provable end-to-end latency guarantees under worst-case contention, not average-delay evidence. This paper presents a two-layer assurance methodology for the CiADS Fast Protection System. First, we...
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Chunguang Jing (Euclid Techlabs (United States))MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
We report the first beam produced by the world’s first conduction-cooled superconducting radio-frequency (SRF) photogun. Euclid has developed a 1.5-cell, conduction cooled Nb3Sn SRF photogun operating at 1.3 GHz. The primary objective of this effort is to demonstrate ultra-stable electron beams for ultrafast electron microscopy and diffraction (UEM/UED) applications. Although SRF systems were...
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Abhishek Pathak (Fermi National Accelerator Laboratory)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
In preparation for commissioning of Linac2 (PIP-II) at Fermilab, software tools automating Orbit Response Matrix measurement and beam-based localization of quadrupole magnetic centers are being developed. The intention is to realize the procedures in a low-loss mode compatible with otherwise regular operation. The ORM is measured using simultaneous low-amplitude excitation of multiple dipole...
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Dr Shouta Ikeda (Institute of Science Tokyo)MC3.A04: Proton linac projectsPoster Presentation
The accelerator-driven compact neutron source systems RANS and RANS-II have been operated at RIKEN for many years. To enable on-site applications, the development of a transportable neutron source system, RANS-III, has been initiated, requiring significant reductions in size and weight for automobile transportation. To meet this requirement, a compact four-vane RFQ linac operating at 500 MHz...
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Ahong Li (Institute of High Energy Physics, Spallation Neutron Source Science Center)MC2.A02: Electron linac projectsPoster Presentation
The Southern Advanced Photon Source (SAPS) constitutes a 3.5 GeV fourth-generation storage ring. A full-energy linac injector based on a low-emittance C-band RF gun and C-band high-gradient accelerating structures (HGAS) has been proposed. To meet the engineering requirements for compactness and reliability, a compact C-band traveling wave accelerating tube has been designed and fabricated....
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Jongchul Lee (Korea Atomic Energy Research Institute)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The RFT-30 cyclotron facility is mainly operated for radioisotope production using a 30 MeV proton beam accelerated by the H- cyclotron. Among the high-energy beam transport lines, one beamline is also used as a research beamline for proton and neutron irradiation experiments. Recently, the irradiation requirements have become more diverse, and studies are being conducted to quantitatively...
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Sangbeen Lee (Korea Atomic Energy Research Institute)MC4.A04: Low level RFPoster Presentation
The Heavy-ion Irradiation Facility (KAHIF) RFQ is transitioning its Low-Level RF (LLRF) infrastructure from a legacy analog system to a modern digital architecture to enhance the stability of its 25.96 MHz pulsed operation. The existing analog system faces limitations in precise phase regulation and compensation for the nonlinear pulse droop inherent in its vacuum tube amplifier chain.
This...
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Sunwoo Moon (Korea Institute of Science and Technology)MC3.A03: Other proton/ionPoster Presentation
A gas ionization chamber (GIC) has been developed as an alternative to commercial silicon detectors, which suffer from poor energy resolution for heavy ions due to pulse height deficit. The GIC incorporates a 100 nm thick silicon nitride entrance window and a Frisch-grid electrode configuration with a grid inefficiency of ~0.16%, enabling efficient charge collection while minimizing...
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fanyu wang (Institute of High Energy Physics, Chinese Academy of Sciences)MC4.A05: Other technologyPoster Presentation
The operational stability of high-power RF components—e.g., superconducting cavity input couplers and klystron ceramic windows—is critical for reliable superconducting RF (SRF) linear accelerators. To ensure long-term continuous-wave (CW) high-gradient operation, these components must undergo rigorous high-power conditioning at levels exceeding nominal limits. However, megawatt-level RF test...
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Jungho Mun (Korea Atomic Energy Research Institute)MC2.A02: Electron linac projectsPoster Presentation
Pulse radiolysis is a powerful technique for investigating the initial kinetics and mechanisms of radiation-induced chemical and biological reactions by irradiating samples with high-energy ultrashort radiation pulses and observing transient intermediates through time-resolved spectroscopy. This method enables direct tracking of ultrafast processes on the ns–μs timescale, including electron...
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Kenta Futatsukawa (High Energy Accelerator Research Organization)MC4.A04: Low level RFPoster Presentation
In high current pulsed beam accelerators such as the J-PARC linac, beam loading compensation is essential for maintaining uniform accelerating fields in the presence of beam loading and reducing momentum variation within a pulse. In practice, fluctuations in high power RF components and beam conditions cause the optimal compensation parameters to vary continuously. To address this issue, we...
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Kwanghoon Kim (Pohang Accelerator Laboratory)MC4.A07: Room temperature RFPoster Presentation
A prototype RF absorbing load has been designed at the Pohang Accelerator Laboratory to stably absorb multi‑megawatt peak power and several kilowatts of average power. Conventionally, silicon carbide (SiC) loads have been widely employed for residual RF power absorption. In this study, however, a different approach was adopted by coating an absorbing material onto an aluminum structure,...
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Dr Rishabh Bajpai (High Energy Accelerator Research Organization)MC4.A04: Low level RFPoster Presentation
At KEK, an International Linear Collider prototype cryomodule with eight TESLA-type cavities is under development. The cryomodule will operate in pulsed mode at 5 Hz. During RF operation, electromagnetic forces mechanically deform the cavity structure, shifting the resonance frequency through Lorentz Force Detuning (LFD).
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A common method for LFD compensation is feedforward control using a... -
Dr Konstantin Popov (Joint Institute for Nuclear Research)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
Vortex electron beams are quantum states carrying quantized orbital angular momentum (OAM). Their extension to relativistic energies remains an open challenge, as experimental realizations so far are limited to electron microscopes at a few hundred keV. Such beams are of growing interest in accelerator physics, as OAM-carrying electrons may provide complementary tools for studies of nucleon...
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Ha-Na Kim (Institute for Basic Science)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
The resonance ionization laser ion source (RILIS) has become the most-used ion source type in the ISOL (Iso tope Separator for On-Line) facilities worldwide due to its element selectivity and high ionization efficiency. The hot-cavity type RILIS developed at RAON is based on resonant excitation of atomic transitions by the frequency tuned laser beams which are overlapped temporally and...
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Alexander Plastun (Facility for Rare Isotope Beams)MC4.A01: Beam diagnosticsPoster Presentation
Non-invasive measurements of the beam quadrupole moment provide information for the evaluation of the beam emittance and Courant-Snyder parameters for transverse matching. Such a procedure is required for each charge state of heavy ion beams at multiple locations along the FRIB linac. We are developing a quadrupole mode resonator, enabling us to extract the information about the beam...
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Dr Yuki Abe (High Energy Accelerator Research Organization)MC4.A08: Superconducting RFPoster Presentation
Contamination by particulate matter, such as dust and debris, during the assembly of SRF cavities and their associated components can significantly degrade cavity performance due to thermal losses and field emission. Therefore, it is essential to suppress both the generation and intrusion of particulates in addition to maintaining a clean environment. Human activity is a dominant source of...
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Yasuhiro Kondo (Japan Atomic Energy Agency)MC3.A07: Superconducting structuresPoster Presentation
We are now developing a capacitive bellows tuner to increase a frequency tuning range of low-beta single spoke cavity. By inserting a length-adjustable niobium bellows electrode from the outer conductor of a coaxial (half-wavelength) superconducting cavity toward the inner conductor electrode, a larger tuning range than conventional methods is realized. The bellows electrode is fabricated from...
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yang zhao (Institute of High Energy Physics, Chinese Academy of Sciences)MC2.A03: Energy recovery linacsPoster Presentation
For large particle accelerators, the radio-frequency (RF) power source system constitutes the most significant portion of total energy consumption. A substantial fraction of the RF energy not utilized for charged particle acceleration is directed to an absorption load at the output of the accelerating structure, where it is converted into thermal energy and dissipated. To use this otherwise...
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Sergey Kurennoy (Los Alamos National Laboratory)MC3.A04: Proton linac projectsPoster Presentation
Increasing energy of proton beam at the Los Alamos Neutron Science Center (LANSCE) from 800 MeV to 3-5 GeV will improve radiography resolution ten-fold. This energy boost can be achieved with a compact cost-effective linac based on normal conducting high-gradient (HG) RF accelerating structures operating at liquid nitrogen temperatures (cryo-cooled). Such an HG booster is feasible for proton...
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NOMAN HABIB (Institute of High Energy Physics)MC2.A02: Electron linac projectsPoster Presentation
This paper presents the design and simulation of a high-efficiency 10 MW RF power source including the complete electron gun, electromagnet focusing system, RF interaction structure and output window. At an accelerating voltage of 115 kV, the designed electron gun produces a total space-charge-limited beam current of 132 A while maintaining an average cathode loading below 3.36 A/cm², which is...
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Bum-Sik Park (Institute for Basic Science), Dr Yeongheum Yeon (Institute for Basic Science)MC3.A01: Industrial and medical acceleratorsPoster Presentation
Radioisotopes such as ²¹³Bi, ²²³Ra, ²²⁵Ac, and ²²⁷Th are alpha emitters and are regarded as among the most promising candidates for targeted cancer radiotherapy, owing to the high linear energy transfer, ~100 keV/μm, and their short path length in biological tissue, typically 50–100 μm. Recently, IRIS initiated a project to develop ²²⁵Ac production by irradiating ²³²ThO₂ targets with protons...
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Dr Aleksey Adonin (GSI Helmholtz Centre for Heavy Ion Research)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
The heavy ion accelerator facility GSI (Darmstadt, Germany) is internationally recognized as a unique center for research, offering over 100 different ion species derived from 34 chemical elements, ranging from hydrogen to uranium. Scientific experiments utilizing high-energy ion beams provided by the heavy ion synchrotron SIS-18 are typically served by pulsed high-current ion sources....
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Fu Ma (Institute of Modern Physics), Xuejun Yin (Institute of Modern Physics), Zhongshan Li (Institute of Modern Physics)MC3.A02: Ion linac projectsPoster Presentation
The research on heavy ion linac was began more than ten years ago initially aim to improve the HIRFL operation at IMP. In China, a continuous wave (CW) heavy ion linac,SSC Linac, working at 53.667MHz was developed as the SSC injector. The ion particle can be accelerated to 1.48MeV/u with the designed A/q=5.17. At present stage, this CW linac has been put into operation and the Uranium has...
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Jinyul Hu (Pohang Accelerator Laboratory)MC4.A04: Low level RFPoster Presentation
PAL-XFEL has been operating two beamlines simultaneously since 2021. The simultaneous operation method involves generating and accelerating single bunch of electrons at 60 Hz to provide 30 Hz beams to the hard X-ray(HX) and soft X-ray(SX) beamlines, respectively. It is intended to switch to a method developed by SwissFEL, which is capable of providing 60 Hz beams to both the HX and SX...
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ZHENGHUI Mi (Chinese Academy of Sciences)MC4.A08: Superconducting RFPoster Presentation
The Institute of High Energy Physics (IHEP) developed the 1.5 GHz third harmonic cavity system for the Hefei Advanced Light Facility (HALF) project. This paper primarily introduces development and test results of the 1.5 GHz cavity and cryomodule. The structure of the harmonic cavity has been simplified, and an integral welding method for the cavity with helium vessel has been adopted to...
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Dr Sung-Ju Park (Pohang Accelerator Laboratory)MC4.A06: RF power sources and power couplersPoster Presentation
Development status of the latest domestically produced 80 MW S-band klystron for Pohang Accelerator Laboratory (PAL) is reported, with emphasis on the VK4 tube now under field qualification at the PAL-XFEL. Earlier prototypes reached the target RF power at low repetition rate but were limited to 30 Hz by frequent gun arcing. Breakdown studies identified clump-assisted discharge in the diode...
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Jeongseog Song (Facility for Rare Isotope Beams)MC4.A05: Other technologyPoster Presentation
The development and reliable operation of high-power beam dumps for heavy ions is unique and highly challenging due to the high volumetric power deposition. The FRIB team has developed, tested, and operates static beam dumps that absorb up to 50 kW of power from heavy-ion beams, including the uranium beam. The development of the rotating beam dump is in progress, with the significant...
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Chunyi Wu (National Synchrotron Radiation Research Center)MC4.A01: Beam diagnosticsPoster Presentation
The 150 MeV electron linear accelerator (LINAC) serves as the primary injector for the Taiwan Photon Source (TPS), requiring high-precision beam stability and reliability to maintain top-up operation performance. Since the commencement of operation, the diagnostic systems—including integrating current transformers (ICTs), wall current monitors (WCMs), and profile monitors—have played a...
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Dr Rishabh Bajpai (High Energy Accelerator Research Organization)MC4.A02: Cryomodules and cryogenicsPoster Presentation
Piezoelectric actuators are widely used in SRF accelerators to compensate for Lorentz force detuning. Since the stroke (displacement) of piezo actuators decreases at cryogenic temperature, accurate evaluation under operating conditions is important. Existing approaches either use the SRF cavity response as an indirect indicator or estimate the stroke from capacitance measurements during...
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Holger Podlech (Goethe University Frankfurt)MC3.A05: RFQsPoster Presentation
A dedicated heavy-ion Radio Frequency Quadrupole (RFQ) accelerator is currently under development at GSI for the SIBAF (Superconducting Ion accelerator as BAsis technology for Fusion research) project. Operating at 108.408 MHz, the RFQ is designed to accelerate heavy ions with a mass-to-charge ratio (A/q) of up to 8.5, from an injection energy of 4 keV/u to a final energy of 300 keV/u. Given...
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Buse Naz Temizel Ozdemir (Northern Illinois University)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Emittance exchange (EEX) is an attractive approach for generating high-frequency bunch trains from transverse modulations. Ongoing efforts aim to explore the limits of longitudinal modulations achievable with EEX beamlines and methods for enhancing radiation brightness for a given beam. One project investigates the generation of nanometer-scale longitudinal modulation using a transmission...
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Mr Geunwoo Kim (Pohang University of Science and Technology)MC4.A07: Room temperature RFPoster Presentation
The PLS-II is considering nonlinear-kicker (NLK) injection to reduce stored-beam perturbations. This scheme requires the linac to deliver a dominant bunch with a reduced energy spread. However, the present S-band pre-buncher and buncher generate multiple bunches, leading to RF-phase-dependent capture conditions and possible injection instability. A previous study using a 500 MHz sub-harmonic...
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Mr Ilya Polikarpov (Soreq Nuclear Research Center)MC3.A04: Proton linac projectsPoster Presentation
Soreq Applied Research Accelerator Facility (SARAF) aims to deliver up to 5 mA CW proton/deuteron beams at energies up to 40 MeV. Neutron TOF experiments at SARAF were initially enabled through a novel electrostatic fast-chopper system installed in LEBT, to allow single RFQ bunch acceleration. More recently, a two-gap electrostatic pre-buncher has been designed, constructed, and installed in...
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Catalin Matei (Extreme Light Infrastructure - Nuclear Physics)MC2.A02: Electron linac projectsPoster Presentation
The ELI – Gamma-ray Beam System (ELI-GBS) is under implementation at Extreme Light Infrastructure - Nuclear Physics (ELI-NP) in Romania. The system uses an 800 MeV S-band accelerator as an Inverse Compton Scattering (ICS) source coupled to an interaction laser. Tunable γ-ray beams will be available with energies up to 19.5 MeV to drive the scientific program which requires high spectral...
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Sofia Johannesson (European Spallation Source)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The European Spallation Source (ESS) is in the final stages of commissioning its linear accelerator (linac), which aims to deliver a high-power proton beam for neutron production. Understanding the dynamics in the machine and comparing measurements with the model can provide a deeper insight into the machine’s performance and help avoid possible issues when we start ramping up the power....
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Davide Lanaia (ALBA Synchrotron (Spain)), Raquel Muñoz Horta (ALBA Synchrotron (Spain))MC2.A07: Synchrotron light sourcesPoster Presentation
The design of an upgrade of the ALBA synchrotron, known as ALBA II, is currently underway. The injector of the ALBA II facility will preserve the existing ALBA injector, based on a 100 MeV linac and a full energy 3 GeV booster, in operation since 2012. To extend the operational lifetime of the linac and improve its reliability throughout ALBA II operation, several consolidation activities have...
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Emma Ghelfi (TRIUMF)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
We present a second-order Hamiltonian formulation describing a beam in a traveling-wave rf structure.
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With the infinitesimal transfer matrix formalism, the linear optics about the accelerating reference particle are computed. The spatial phase advance is obtained from complex electromagnetic field data by extracting the accumulated phase and differentiating it to determine the local wave... -
Hooman Hassanzadegan (European Spallation Source)MC4.A01: Beam diagnosticsPoster Presentation
With the restart of beam commissioning activities at the European Spallation Source (ESS) in January 2026, the Beam Current Monitor (BCM) system has been in operation for more than seven years. During this period, several beam monitoring and machine protection functions have been added to the system, including beam mode and destination consistency checks, as well as differential beam loss...
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Marten Koopmans (European Spallation Source)MC3.A02: Ion linac projectsPoster Presentation
The injector of the European Spallation Source (ESS), comprising the ion source, low energy beam transport (LEBT), and radio frequency quadrupole (RFQ), will deliver a 62.5 mA proton beam in 2.86 ms pulses a at repetition rate of 14 Hz at 5 MeV beam energy for further acceleration in the normal and superconducting RF structures. The ion source and LEBT parameters are critical for the...
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Ralitsa Sharankova (Fermi National Accelerator Laboratory)MC4.A01: Beam diagnosticsPoster Presentation
The Fermilab Linac delivers 400 MeV H- beam to the Booster rapid cycling synchrotron. Longitudinal dynamics in the Linac affects the beam losses in the Linac itself as welll as at the Booster. To understand better the longitudinal beam properties, two bunch shape monitors (BSM) in the Linac transition section where RF frequency changes from 201 MHz to 805 MHz, were recently brought back to...
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Yu Du (Institute of Modern Physics, Chinese Academy of Sciences)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
F-divergence can be used to precisely quantify the differences between beam distributions in high-dimensional phase space, as it comprehensively captures the total contribution of discrepancies from all points in phase space. Current applications of f-divergence are primarily confined to the static comparison of distributions. This paper aims to investigate its evolution during beam transport....
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Peter Gerhard (GSI Helmholtz Centre for Heavy Ion Research)MC4.A05: Other technologyPoster Presentation
The efficiency of stripping heavy ions like uranium into a single charge state at 1.4 MeV/u using a gas target can be increased significantly by applying hydrogen instead of nitrogen, thereby narrowing the resulting charge state spectrum. However, pulsed injection into a dedicated interaction chamber will be required to reduce the load of the vacuum pumping system to an acceptable level. Such...
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Buse Naz Temizel Ozdemir (Northern Illinois University)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The effect of a shielded vacuum chamber on Coherent Synchrotron Radiation (CSR) has been studied in previous theoretical and experimental works. While these studies have identified key features of the shielding effect, its impact on a beam under practical bunch compression conditions remains less explored. Experimental investigation is underway using a chicane-like beamline installed at...
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Mr Phani Deep Meruga (Instrumentation Technologies (Slovenia), Sapienza University of Rome)MC4.A04: Low level RFPoster Presentation
Low-Level RF (LLRF) systems are essential for maintaining amplitude and phase stability in modern linear accelerators, directly affecting beam quality and operational reliability. The increasing use of X-band technology in compact, high-gradient linacs enables ultra-short RF pulses and higher accelerating fields, while also increasing sensitivity to phase noise, timing jitter, and thermal...
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Xin Ma (Chinese Academy of Sciences)MC3.A02: Ion linac projectsPoster Presentation
The CAFE2 accelerator, upgraded from CAFe at IMP, supports superheavy element research. Based on the RAMI framework, this paper decomposes CAFE2 using PBS and applies fault tree analysis at system, subsystem, and equipment levels to identify beam trip events. Historical data show that the superconducting section and control system are the main causes of beam losses. Although CAFE2 has high...
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Paolo Craievich (Paul Scherrer Institute)MC2.A01: CollidersPoster Presentation
The FCC-ee demands an injector complex capable of delivering high-current, high-brightness electron and positron beams with exceptional efficiency. Within the CHART/FCC-ee Injector Study collaboration, a revised injector layout has been developed to optimize performance, cost, and power consumption. A central pillar of this effort is the tuning-free, high-gradient normal-conducting RF...
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Soyeon Kim (Ulsan National Institute of Science and Technology)MC2.A07: Synchrotron light sourcesPoster Presentation
The linear accelerator of the PLS-II in Pohang has been in operation for approximately 30 years, leading to performance degradation and stability issues. To address these challenges, this study proposes a storage ring injector based on a laser-plasma accelerator (LPA), capable of generating GeV-class electron beams with high accelerating gradients, and analyzes its feasibility. Assuming an...
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Vlada Yarygova (Budker Institute of Nuclear Physics)MC1.A04 Plasma and wakefield accelerationPoster Presentation
Plasma wakefield acceleration is a promising method of accelerating charged particles based on the excitation of strong electric fields in plasma. These fields arise when a driver, such as a particle beam or a laser pulse, propagates through the plasma and displaces electrons, forming a wave with accelerating gradients far exceeding those of conventional accelerators. In this work we study the...
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Scott Cogan (Facility for Rare Isotope Beams)MC4.A01: Beam diagnosticsPoster Presentation
At FRIB, we have developed three feedback systems to stabilize the operation of the liquid lithium film used as a charge stripper. Two relatively slow feedback systems maintain the beam energy, the energy loss in the stripper, and the time of flight to the following RF cavity unchanged. The third system blocks the beam with the fast chopper during periods of fast instabilities, changing the...
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Sergey Kutsaev (RadiaBeam Technologies (United States))MC2.A05: Industrial and medical acceleratorsPoster Presentation
This talk reports on the design, fabrication, and beam testing of a novel 2 MeV Ku-band (15.14 GHz) traveling wave electron linear accelerator developed by RadiaBeam Technologies for a battery-powered, hand-portable X-ray generator intended for field radiography and non-destructive testing (NDT). The goal is to replace hazardous isotopes, such as Ir-192, Cs-137, and bulky betatrons with a...
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Anton Tropp (Diamond Light Source)MC2.A07: Synchrotron light sourcesPoster Presentation
Diamond Light Source has, since the start of operation, run with both single bunch and multi bunch injection. Due to limitations in functionality and jitter in multi bunch mode, Diamond has been running with an upgraded gun pulser for the past 3 years. This pulser enables flexible modulation of the gun cathode in multi bunch mode by generating voltage waveforms from an arbitrary waveform...
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Ziga Kroflic (Cosylab)MC4.A01: Beam diagnosticsPoster Presentation
In collaboration with the European Spallation Source (ESS) and Riga Technical University, we wanted to explore real-time ML model inference on FPGAs for beam waveform classification. To identify a viable solution, we evaluated two ML toolchains on the Xilinx Versal VCK190 adaptive SoC. The first uses the Vitis AI toolchain to integrate the DPUCVDX8G deep learning processing unit and 64-tile AI...
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Osman Emre Delialioglu (The Graduate University for Advanced Studies, SOKENDAI)MC4.A04: Low level RFPoster Presentation
The muon high-precision (g-2)/EDM experiment, which is planned at the J-PARC, utilizes the world’s first dedicated muon linear accelerator (linac), requiring stringent Radio-Frequency (RF) field stability. The Radio Frequency Quadrupole (RFQ), the linac's initial stage, experiences frequency shifts that cause operation outside the RFQ bandwidth. Due to budget constraints, conventional tuning...
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DAON LEE (Kangwon National University)MC4.A01: Beam diagnosticsPoster Presentation
Emittance is a key parameter that characterizes beam quality and its behavior under given optics. Conventional emittance measurement methods reconstruct the beam phase-space based on Twiss parameters calculated from beam profiles, and are therefore based on Gaussian beam optics. To overcome this limitation, tomography techniques have been introduced to reconstruct the phase-space distribution...
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349. Gain and beam quality degradation in a transverse gradient undulator in the large signal regimeXingguang Liu (Chinese Academy of Sciences)MC2.A04: FELsPoster Presentation
The transverse gradient undulator (TGU) is a key component for realizing diffraction-limited storage-ring-based X-ray free-electron laser oscillators (XFELOs), as it can compensate for the large energy spread in storage ring electron beams. Previous studies have mainly focused on the small-signal gain of the TGU in such a setup. However, under large-signal conditions, the gain can deviate...
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Zhiping Li (Institute of High Energy Physics)MC3.A04: Proton linac projectsPoster Presentation
The CSNS linac delivers a primary H⁻ beam to the RCS while also providing stripped proton beams generated through two mechanisms: foil stripping and intra-beam stripping. Carbon foil collimators selectively strip halo particles from the beam periphery, reducing the transverse emittance of the H⁻ beam, which allows a larger painting range during RCS injection and reduces beam loss. Intra-beam...
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Yu Zhao (Institute of High Energy Physics)MC2.A07: Synchrotron light sourcesPoster Presentation
A promising direction for fourth-generation light sources is the integration of a free-electron laser (FEL) oscillator to achieve higher spectral brightness. This approach imposes stringent requirements not only on the FEL oscillator parameters but also on the storage ring's performance. Preliminary studies at the Southern Advanced Photon Source (SAPS) indicate that the optimal gain for an...
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Xiangkun Li (Deutsches Elektronen-Synchrotron DESY), Dr Zohrab Amirkhanyan (Deutsches Elektronen-Synchrotron DESY)MC2.A02: Electron linac projectsPoster Presentation
The photoinjector test facility at DESY in Zeuthen (PITZ) is developing a dedicated R&D platform for electron FLASH radiation therapy, known as FLASHlab@PITZ. Benefiting from the long RF pulse (1 ms at 1–10 Hz) of the accelerator and the flexible time structure of the photocathode drive laser, an exceptionally wide range of dose rates—from 0.05 Gy/s to beyond 10¹² Gy/s—can be achieved using 20...
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Emre Cosgun (High Energy Accelerator Research Organization)MC4.A01: Beam diagnosticsPoster Presentation
The J-PARC Muon Linac is being developed for precision measurements of the muon anomalous magnetic moment and the search for the muon electric dipole moment using a reaccelerated thermal muon beam. The Medium Energy Beam Transport (MEBT) line, planned for commissioning in 2027, will transport and match the muon beam to the Inter-digital H-mode drift tube linac (IH-DTL). Because the expected...
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Hyeon Myeong Jeong (Ulsan National Institute of Science and Technology)MC1.A04 Plasma and wakefield accelerationPoster Presentation
Laser wakefield acceleration (LWFA) enables compact accelerator with accelerating gradient of GV/cm scale in the wakefield in the plasma excited by ponderomotive force of intense laser. We used the waveguide to increase interaction length and downramp injection method to control the injection which results in electron beams with GeV scale energy and low energy spread. However, to combine the...
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Aleksandr Makarov (National Research Nuclear University MEPhI)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The design of modern accelerators requires a detailed analysis of charged-particle beam dynamics, taking into account nonlinear effects that may limit the achievable facility parameters. Accountability of the self-fields of high-brightness beams in a linear accelerator (injector) for a free-electron laser is particularly important, since these fields largely determine the final emittance,...
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mengxue li (Institute of Modern Physics, Chinese Academy of Sciences)MC3.A05: RFQsPoster Presentation
Abstract: To resolve the strong parameter coupling and competing objectives in high-intensity RFQ beam-dynamics design, this paper presents a hierarchical optimization framework based on the Covariance Matrix Adaptation Evolution Strategy. A 14-knot parameterization reduces the problem from more than 600 dimensions to a tractable 42-dimensional optimization problem.Piecewise Cubic Hermite...
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Mikhail Vladimirov (National Research Nuclear University MEPhI)MC2.A05: Industrial and medical acceleratorsPoster Presentation
The NRNU MEPhI and the CORAD has been developing and commissioning linear accelerators for industrial and scientific applications. The designed linacs are operate on a standing wave and S-band. Linacs are based on a biperiodic accelerating structures. Due to the sufficiently high values of the received beam currents (from several hundred mA and above) and, consequently, a significant beam...
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DAISUKE SATOH (National Institute of Advanced Industrial Science and Technology)MC2.A06: Other electron acceleratorsPoster Presentation
The dielectric assist accelerating (DAA) structure is a power-efficient RF accelerating cavity. A room-temperature C-band DAA structure has demonstrated a high shunt impedance of approximately 600 MΩ/m. Nevertheless, the attainable accelerating field in DAA structures has so far been limited to approximately 10–12 MV/m, mainly because of RF breakdown-related phenomena, including...
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Igor Pogorelsky (Brookhaven National Laboratory)MC1.A03 Other beamsPoster Presentation
LWFAs, with their gradients of tens of GeV/m, are a potential candidate for next generation particle sources. Recent theoretical work has indicated that there is a fundamental tradeoff between acceleration efficiency and beam stability in these devices. The Accelerator Test Facility (ATF) is engaged into experimentally study of this tradeoff by injecting relativistic electron bunches from a...
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Didier Uriot (Commissariat à l'Énergie Atomique et aux Énergies Alternatives)MC3.A04: Proton linac projectsPoster Presentation
The HiCANS (High Current Accelerator-driven Neutron Source) concept offers a new technical solution for creating a neutron source suitable for neutron scattering techniques. It is based on a high-intensity (50-100 mA), pulsed (0.4-2 ms) and low-energy (10-70 MeV) proton beam accelerator.
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The ICONE (Innovative COmpact NEutron facility) project is part of this approach. Led by the CEA and the... -
Jerone Samari (Thomas Jefferson National Accelerator Facility)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
We present a method for detecting and characterizing anomalies in a nominally decoupled, recirculating linac accelerator, such as the Continuous Electron Beam Accelerator Facility (CEBAF). Proposed future accelerators of this type include PERLE and LHeC. The method computes the zero-lag cross-plane covariance from samples of beam position data, and analyzes its singular value decomposition...
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Ruben Lorenzo Ortega (IFMIF-DONES Spain Consortium)MC4.A01: Beam diagnosticsPoster Presentation
The International Fusion Materials Irradiation Facility-DEMO-Oriented Neutron Source (IFMIF-DONES), a cutting-edge accelerator-based neutron source for fusion materials research. IFMIF-DONES Facility Project involves a particle accelerator that produces a deuterons beam of 40 MeV and 125 mA, impacting on a flowing liquid lithium target, generating the neutron source by nuclear stripping...
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Akito Uchiyama (RIKEN Nishina Center)MC4.A05: Other technologyPoster Presentation
Stable control system operation is essential for long-term linac operation. At RIKEN, RILAC is operated as a heavy-ion linear accelerator and plays an important role in supplying beams for superheavy-element research. In the existing RIBF control system, many devices are integrated into EPICS through TCP/IP-based socket communication. Although TCP/IP-based interfaces are flexible and...
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Geonyeong Mun (Pohang Accelerator Laboratory)MC4.A05: Other technologyPoster Presentation
PAL-XFEL is a fourth-generation X-ray free electron laser facility in Pohang, Korea. The existing operation mode PLC system interfaced with the Personnel Safety Interlock System (PSI) using a legacy embedded PLC platform that had reached end-of-life status. To replace the system while maintaining compatibility with the existing infrastructure, a new control system based on Raspberry Pi 5,...
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Dr Young-Gi Song (Korea Multi-purpose Accelerator Complex)MC4.A05: Other technologyPoster Presentation
High-power RF systems in proton linear accelerators require reliable protection against abnormal conditions such as RF arcing and excessive reflected power. At KOMAC, the existing analog RF interlock system was upgraded to a digital platform based on a Zynq System-on-Chip architecture to improve operational flexibility and system integration.
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The developed system digitizes forward, reflected,... -
Gregor Loisch (GSI Helmholtz Centre for Heavy Ion Research)MC3.A02: Ion linac projectsPoster Presentation
The international Facility for Antiproton and Ion Research (FAIR) is a heavy ion accelerator complex currently under construction at the GSI Helmholtz Centre for heavy ion research in Darmstadt. Following a major fire incident at the particle beam source of GSI and FAIR, the linear accelerator UNILAC, a threefold plan has been devised to restore beam operation for accelerator commissioning and...
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Borut Baricevic (Instrumentation Technologies (Slovenia))MC4.A04: Low level RFPoster Presentation
LLRF control of accelerating cavities with microsecond-scale pulses is challenging because the short pulse duration prevents effective use of conventional FPGA-based intra-pulse feedback, limiting control to pulse-to-pulse corrections. This is often insufficient in the presence of RF-chain-induced jitter to ensure the required field stability. To address this, we propose a novel intra-pulse...
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Paula Desire Valdor (European Organization for Nuclear Research)MC2.A04: FELsPoster Presentation
Intrabeam Scattering (IBS) has recently been recognized as a limiting factor for free electron laser (FEL) performance, making it a critical concern for the linear accelerator community. There is a growing need for accurate numerical tools to compute IBS and integrate it with other collective effects, as most previous studies assumed Gaussian beams, which are not representative of FEL...
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Dr Sergey Kuzikov (Thomas Jefferson National Accelerator Facility)MC4.A08: Superconducting RFPoster Presentation
We describe a method for determining the loaded (QL), unloaded (Q0), and external quality factors of superconducting radio-frequency (SRF) resonators based on S11 measurements using a vector network analyzer (VNA). Although S11 characterization is a straightforward measurement technique, it is not sufficiently mature to directly yield accurate QL and Q0 values. One limitation is that...
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Mr Yutaro Kubo (Kyoto University)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
Cs-Te photocathodes are widely used in photoinjectors for free electron lasers owing to their high quantum efficiency (QE). At KU-FEL, an infrared oscillator-type FEL in Kyoto University, a 1.6-cell RF gun with CsBr-coated Cs-Te photocathode* has been developed for high-bunch-charge (~1 nC) multi-bunch operation. However, the QE and lifetime of the cathode in our RF gun are insufficient for...
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Jiayin Du (Institute of High Energy Physics)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
With the rapid advancement of high-intensity linear accelerators, achieving efficient and accurate design has become a critical challenge in modern accelerator physics. As beam intensity increases, the space charge effect — arising from the mutual repulsion among charged particles within the beam — becomes increasingly significant and must be incorporated into realistic simulations. In this...
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Mr Zhijun Wang (Institute of Modern Physics)MC3.A03: Other proton/ionPoster Presentation
This talk treats parasitic creation and acceleration of H-particles in a proton linear accelerator. It proposes, and provides evidence, that protons extracted from an ECR source interact with residual gas along the LEBT section thus creating H- ions. These are transported to the RFQ, RF-bunched therein, and finally RF-accelerated up to the nominal proton energy. Once passing a deflection...
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Maleesh Shehan Rathnasiri Dissanayake Mudiyanselage (Lancaster University)MC4.A08: Superconducting RFPoster Presentation
Integrating ferroelectric fast reactive tuners (FE-FRTs) into SRF cavities offers a promising route to mitigate microphonics. This work reports the design and characterisation of an FE-FRT coupled to a 1.3 GHz two-cell cavity, supported by a lumped element equivalent circuit model and 3D CST simulations. From this framework, external Q-factors, FPC specifications, and generator power...
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Mr Mark Keelan (ISIS Neutron and Muon Source)MC4.A07: Room temperature RFPoster Presentation
With ~40 successful years of operational life behind it, ISIS’ linac tank 4 at RAL in the UK recently underwent a faultless replacement programme seeing the facility upgraded with a new 20MeV accelerating cavity. The fate of the old tank required careful consideration, with necessary attention to the environmental and sustainable impact presented. Here we tell the story of a very large...
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Mikhail Nozdrin (Joint Institute for Nuclear Research)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
A laser-driven RF-Gun test-bench development and commissioning is ongoing at the Dzhelepov Laboratory of Nuclear Problems (DLNP) at the Joint Institute for Nuclear Research (JINR). Bench primary purpose is to investigate the possibility of replacement the JINR DLNP electron linac thermionic gun with the laser-driven RF-Gun. Another important task is the relativistic vortex electron beams...
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Valery Kobets (Joint Institute for Nuclear Research)MC2.A02: Electron linac projectsPoster Presentation
Last preparations for operation for users are ongoing at the new basic facility of the Laboratory of Nuclear Problems of the Joint Institute for Nuclear Research — the LINAC (formerly LINAC-200) accelerator. The facility can provide electron beam with a wide range of energies (5 to 200 MeV), pulse durations (0.25 to 3 us) and charges (240 nC to single electrons per pulse). The maximum pulse...
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Tianzhe Xu (Zhangjiang Laboratory)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Many accelerator applications, including free-electron lasers and ultrafast electron diffraction, impose stringent requirements on beam energy and arrival-time stability. In linacs, these fluctuations are primarily driven by amplitude and phase variations in RF systems. Conventional jitter analysis typically relies on large ensembles of simulation runs, which are computationally expensive and...
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Dr Anne Oppelt (Deutsches Elektronen-Synchrotron DESY)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
Gun5, the new generation of normal-conducting 1.3 GHz RF guns for high-gradient and long-pulse operation at DESY’s linac driven free-electron lasers is in operation at PITZ and European XFEL. The improved gun design allows for RF pulse durations of up to 1 ms at 10 Hz repetition rate, at gradients of ~60 MV/m at the cathode. Special features are two RF pickups for RF regulation and a symmetric...
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Pablo Martinez Reviriego (European Organization for Nuclear Research)MC3.A05: RFQsPoster Presentation
CERN's Linear Accelerator 4 (Linac4) is an H⁻ accelerator that has been in operation since 2020. After acceleration, the ions are converted to protons via electron stripping and sent downstream to various experiments on the CERN site. Its first accelerating structure is a 3 m long Radio-Frequency Quadrupole (RFQ), operating at 78 kV inter-vane voltage and a peak surface field of 34 MV/m. In...
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Christopher Zimmer (SLAC National Accelerator Laboratory)MC2.A04: FELsPoster Presentation
The LCLS-II Free Electron Laser delivered 33 kHz X-ray beam to users for most of 2025 and also demonstrated stable X-ray beam production at 93 kHz. The Superconducting Linac shut down at the end of 2025 for installation activities supporting the LCLS-II-HE (High Energy) upgrade, with an anticipated accelerator restart in early 2027. Recent experience/progress will be summarized along with...
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Shriraj Kunjir (Facility for Rare Isotope Beams)MC4.A05: Other technologyPoster Presentation
RF and SRF operations require rapid decisions under tight time constraints while navigating machine data, logs, procedures and institutional knowledge. In many troubleshooting scenarios, the bottleneck is not diagnostic signal availability, but the time required to gather context, reconstruct event timelines, communicate status and transfer knowledge across shifts. This talk presents how AI...
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Jun Peng (Institute of High Energy Physics)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The China Spallation Neutron Source (CSNS) officially initiated its power upgrade project(CSNS-Ⅱ) in 2024, aiming to raise the accelerator beam power from 100kW to 500kW. The CSNS accelerator consists of an 80 MeV normal conducting linear accelerator and a 1.6 GeV rapid cycling synchrotron. To increase the peak beam intensity from 10mA to 40 mA, we plan to replace the front end system of the...
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Martin Kay (Los Alamos National Laboratory)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
We present an enhanced tuning method for the 800-MeV side-coupled cavity linac (CCL) at the Los Alamos Neutron Science Center (LANSCE). The method utilizes the High-Performance Simulator (HPSim) 6-D particle tracking code to reproduce time-of-flight measurements taken during CCL module phase scans. By fitting to the data, HPSim allows verification of the RF field amplitude and provides the...
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Yiming Xu (Shanghai Synchrotron Radiation Facility)MC4.A04: Low level RFPoster Presentation
High-gradient radio-frequency (RF) pulses are fundamental to the operation of linear accelerators. In a typical linac, such pulses are generated by a klystron or magnetron. To obtain higher peak power, RF pulse compressors are widely employed. A relatively long, low-power pulse with a specifically tailored amplitude and phase profile can be transformed by the compressor into a short pulse with...
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Igor Pogorelsky (Brookhaven National Laboratory)MC1.A04 Plasma and wakefield accelerationPoster Presentation
Long-wavelength infrared (LWIR) laser drivers provide access to unique regimes of laser wakefield acceleration (LWFA). In particular, the scaling of ponderomotive force and matched spot size with wavelength makes LWIR sources naturally suited for operation at low plasma density, where large accelerating structures and improved beam quality become accessible. We present a comparative analysis...
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Ji-Ho Jang (Institute for Basic Science)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The RAON superconducting linac consists of quarter-wave resonator (QWR) and half-wave resonator (HWR) sections and is designed to accelerate ion beams from protons to uranium, with a uranium beam energy of up to 18.5 MeV/u. During the 2026 beam commissioning, three QWR cavities and eight HWR cavities were not available for operation. The absence of multiple cavities can disturb the...
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Yong Liu (High Energy Accelerator Research Organization)MC3.A04: Proton linac projectsPoster Presentation
Optimizing lattice and beam tuning in high-current hadron linacs requires reliable characterization of the full three-dimensional phase space. However, longitudinal diagnostics in linacs are inherently sparse, leading to limited observability and ambiguities in phase space. In J-PARC linac, only a few bunch shape monitors are available, and their use is constrained by operational limitations,...
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Peter Braun (Goethe University Frankfurt)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
LORASR-Designer is a graphical user interface for linac beam dynamics design and simulation based on the LORASR simulation code developed at IAP. It extends existing LORASR workflows by enabling interactive configuration, parameterization, and validation of RF linac layouts. Instead of direct input-file editing, accelerator sections and design parameters are represented in a structured...
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Dr Konstantin Popov (Joint Institute for Nuclear Research, Institute of Nuclear Physics)MC4.A04: Low level RFPoster Presentation
Low-Level RF and timing systems are of primary importance to operate laser-driven RF-Gun. The laser oscillator piezo feedback synchronizes the phase between laser pulse and accelerating field. The laser pulse picking is conducted by the acousto-optic modulator in order to generate from single shot to tens pulses per facility machine cycle. The acousto-optic modulator operation is synchronized...
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Pablo Martinez-Reviriego (European Organization for Nuclear Research)1MC3.A05: RFQsPoster Presentation
The first RF accelerating structure in CERN’s Linac4 is a 352.2 MHz radio-frequency quadrupole (RFQ), which focuses, bunches, and accelerates the 45 keV H⁻ beam from the ion source. As the RFQ constitutes a single point of failure (SPOF) in Linac4, a nearly identical spare cavity (RFQ2) has been manufactured at CERN.
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After fabrication and assembly, a combined field and frequency tuning... -
Mr Geunwoo Kim (Pohang University of Science and Technology)MC4.A07: Room temperature RFPoster Presentation
S-band transverse deflecting cavity (TDC) system is being developed at Pohang Accelerator Laboratory (PAL) using its in-house brazing facility. This TDC will be employed for the longitudinal phase-space characterization of electron beams in the eLABs at PAL. TDCs require low-power RF tuning before high-power conditioning and beam operation because input-coupler-cell errors can affect both the...
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Antonio Gilardi (European Organization for Nuclear Research)MC4.A05: Other technologyPoster Presentation
Machine learning (ML) is increasingly recognized as a fundamental tool in modern accelerator physics, offering new capabilities to complement and extend traditional analytical approaches. A structured programme of ML studies has been initiated at CLEAR (CERN Linear Electron Accelerator for Research), covering three principal directions: beam diagnostics, charge forecasting, and automated...
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Won Jang (Pohang University of Science and Technology)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
To achieve a high-brightness X-ray free-electron laser (FEL), it is essential to perform precise tuning of electron beam parameters at the photoinjector section, where the intrinsic emittance is determined. At PAL-XFEL, injector tuning is typically performed via manual, parameter-scan-based emittance optimization, which can be time-consuming. In addition, simulation-based beam matching often...
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14. Matched transport of intense and coupled coasting beams through quadrupole and solenoid channelsChen Xiao (GSI Helmholtz Centre for Heavy Ion Research)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
For the time being, determining the cell-to-cell periodic solution for transporting intense beams has been limited to the spatial envelope. Recently, a numerical method for provision of full 4d-periodicity of all 10 beam moments of an intense 4d-coupled beam has been developed and benchmarked with tracking simulations. For instance, it will pave the path towards exploring the potential of beam...
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Liwen Liu (Institute of Modern Physics, Chinese Academy of Sciences)MC4.A01: Beam diagnosticsPoster Presentation
This work extends the Maximum Entropy Tomography (MENT) framework from linear to nonlinear beam transport. This nonlinear MENT method enables high-accuracy phase space reconstruction where nonlinear effects are significant, such as for the intrinsically nonlinear longitudinal dynamics in RF hadron linacs and in front ends where elements exhibit large, overlapping fringe fields.
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Following... -
Dr Sergey Kuzikov (Thomas Jefferson National Accelerator Facility)MC4.A08: Superconducting RFPoster Presentation
We describe a method for measuring the loaded and intrinsic quality factors, the external quality factor, and cavity detuning using algorithms based on solutions of the cavity differential equations in the I/Q domain. We report measurement results for Nb₃Sn cavities at Jefferson Lab’s UITF facility. The measurements include several tens of forward, probe, and reflected signal traces, each...
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Alexander Malyzhenkov (European Organization for Nuclear Research)MC3.A01: Industrial and medical acceleratorsPoster Presentation
In 2019, the annual number of cancer cases exceeded 19 million, resulting in 10 million deaths worldwide. Radiation therapy stands out as one of the most effective methods for cancer treatment. Electron beams in the 100-MeV range can reach even deep-seated tumors without the need for surgical intervention. Thanks to novel high-gradient acceleration technologies, clinical facilities for...
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Xiaohu Wang (ShanghaiTech University)MC4.A08: Superconducting RFPoster Presentation
Electropolishing (EP) is a critical surface treatment for pushing the performance limits of superconducting radio-frequency (SRF) cavities in modern CW accelerators. However, localized pitting defects caused by hydrogen bubble stagnation remain a major limiting factor. In this work, we established a scalable, circulation-free beaker EP setup utilizing magnetic stirring and external water-bath...
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Adler Weismantel (Los Alamos National Laboratory)MC3.A01: Industrial and medical acceleratorsPoster Presentation
The LANSCE H- beam ultimately reaches 800 MeV to serve its user programs. The H- beam originates in a filament arc-driven plasma cesiated-surface-conversion H- ion source, and is initially accelerated to 80 kV via a three-stage accelerating column. A prime source of H- beam instabilities at LANSCE come from high voltage arc-downs of the 80 keV Column. These arc downs are primarily due to...
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Michael Galonska (GSI Helmholtz Centre for Heavy Ion Research)MC3.A01: Industrial and medical acceleratorsPoster Presentation
A mixed C/He ion beam with varying helium fraction has been investigated at GSI to study a new mode of image guidance for carbon ion beam therapy. “Mixed” refers to a beam with C and He ions extracted simultaneously from a single ion source (CAPRICE ECR) provided for the subsequent UNILAC-SIS18 accelerator complex during two previous beam times (¹²C³⁺/⁴He⁺ beam). Both ion species were...
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Junwon Choi (Kangwon National University)MC4.A05: Other technologyPoster Presentation
Next-generation storage rings require low emittance and high brilliance, demanding quadrupole magnets with high gradients and stringent multipole field quality. Conventional electromagnetic quadrupoles (EMQs) consume substantial electrical power and require cooling systems due to Joule heating under high-current operation. To address this, a tunable permanent magnet quadrupole (PMQ) allowing...
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Ahong Li (Institute of High Energy Physics, Spallation Neutron Source Science Center)MC3.A06: Room temperature structuresPoster Presentation
The Alvarez-type drift tube linac (DTL) is critical for high-intensity proton accelerators. Higher RF duty factors impose severe cooling demands on drift tubes (DTs). However, DTs embedded with electromagnetic quadrupoles (EMQs) have extremely limited space for water channels due to complex fabrication. This problem is more critical in higher-energy DTL sections, where the heat flux density at...
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Andrei Lunin (Fermi National Accelerator Laboratory)MC4.A08: Superconducting RFPoster Presentation
SRF technology enables particle accelerators to operate with greater average beam currents and higher duty cycles. In these regimes parasitic excitation of the cavity High Order Mode (HOM) spectrum becomes the limiting factor due to extra RF losses and the beam instabilities. We discuss the limitations of HOMs for large accelerator projects such as the Fermilab MI upgrade and the proposed...
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Pablo Martinez Reviriego (European Organization for Nuclear Research)MC4.A07: Room temperature RFPoster Presentation
Accelerating cavities are commonly equipped with RF loads to absorb energy deposited by the beam into higher-order modes (HOMs). These modes generate electromagnetic wakefields that can induce transverse and longitudinal kicks in the beam, potentially leading to beam instabilities.
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This work investigates a novel type of HOM absorber based on resistive coatings deposited on dielectric... -
Dong-O Jeon (Institute for Basic Science)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Parametric instabilities have been long known to the community and studied intensively. However, simulations with the realistic distributions find that no parametric instabilities are manifested except the envelope instability. Moreover, the effect of the envelope instability is less for realistic distribution than Gaussian distribution. Onset of the envelope instability is delayed...
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Alex Murokh (RadiaBeam Technologies (United States))MC4.A03: Industrial developmentsPoster Presentation
RadiaBeam has recently constructed and commissioned an in-house Inverse Compton Scattering (ICS) pilot Demonstrator facility. This compact machine is driven by the novel C-band hybrid photoinjector, which produces high brightness longitudinally compressed beam (250 A) injected into the 2 meter long 100 MeV accelerator module, based on the high-gradient distributed-coupling split-structure...
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Gangtak Nanpon (Joseph Sarwuan Tarka University Makurdi)MC1.A04 Plasma and wakefield accelerationPoster Presentation
Nonlinear plasma wakefield excitation by an ultra-relativistic square Gaussian beam is simulated using FBPIC code. The beam interaction with the background plasma electrons revealed blowout cavity formation. As the beam propagates further into the plasma, blowout cavity elongation along the beam propagation direction was observed. The corresponding electromagnetic field components excited...
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Hao Hu (Huazhong University of Science and Technology)MC2.A02: Electron linac projectsPoster Presentation
The STCF injector Main Linac comprises 36 constant-gradient traveling-wave structures. Equipment misalignments and orbit distortions severely degrade beam quality. This paper presents the design and simulation of its online beam alignment system. First, the spatial layout of dual-plane correctors and beam position monitors (BPMs) is optimized for long-distance transmission. Second, dual-plane...
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Gyuhaeng Jo (Korea Multi-purpose Accelerator Complex)MC4.A05: Other technologyPoster Presentation
Beam loss monitor (BLM) is a key device for protecting accelerator systems, as it measures secondary radiation produced by a particle beam colliding with the inner wall of the accelerator. Therefore, in the KOMAC 100 MeV proton accelerator, BLMs were installed on the 20 MeV DTL (Drift Tube Linac) and 100 MeV DTL tanks for the purpose of machine protection. These BLMs are scintillator-based...
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Seunghyun Lee (Korea Atomic Energy Research Institute)MC3.A02: Ion linac projectsPoster Presentation
he KAERI Heavy-ion Irradiation Facility (KAHIF) is a linear-accelerator-based infrastructure designed to emulate neutron-induced displacement damage in next-generation nuclear and fusion structural materials [1-3]. KAHIF consists of a 25.96 MHz Split-Coaxial Radio-Frequency Quadrupole (SC-RFQ) operating at 178 keV/u, and a 51.92 MHz Interdigital H-mode (IH) drift tube linac capable of...
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Hui Su Kim (Korea Atomic Energy Research Institute)MC2.A05: Industrial and medical acceleratorsPoster Presentation
KAERI Advanced Radiation Technology Institute (ARTI) has been operating an electron irradiation facility for industrial beam application research since 2018. The facility features a versatile suite of industrial electron accelerators, including 200 keV, 2.5 MeV, and 10 MeV systems. This presentation highlights the operational characteristics and application cases of the 2.5 MeV electron...
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Alexander Shemyakin (Fermi National Accelerator Laboratory)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The Side-Coupled Linac (SCL) section of the FNAL Linac accelerates the 20-25 mA H- beam from 116 MeV to 402 MeV in 7 modules. All major components of this section are re-calibrated using beam-based measurements. Module gradients and phases are determined from the phase scans. Longitudinal bunch parameters at the entrance of the section are reconstructed using a Bunch Shape Monitor....
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Pierrick Hamel (Commissariat à l'Energie Atomique)MC3.A05: RFQsPoster Presentation
The IPHI RFQ, designed at CEA in the early 2000s and commissioned in 2016, was the first RFQ developed at CEA. It accelerates a 100 mA beam up to 3 MeV at high duty cycle. Subsequent RFQ projects (SPIRAL2, LINAC4, ESS) enabled improvements in RFQ design and modeling.
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Based on this experience, an upgrade of the IPHI accelerator has been investigated to increase beam energy and improve... -
Xiang He (Institute of High Energy Physics, Chinese Academy of Sciences)MC4.A07: Room temperature RFPoster Presentation
BEPCII Linac operated with 20 power sources before the energy upgrade in summer 2024. To support sustained 2.35 GeV electron-positron collisions and maintain at least one redundant power source for operational reliability, the Linac required an energy increase. Among these, Power sources No. 6 (K6) and No. 12 (K12) exhibited relative lower energy contribution. Phase-matching misalignment...
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Hyung-sup Kong (Pohang Accelerator Laboratory)MC2.A07: Synchrotron light sourcesPoster Presentation
The Pohang Light Source-II (PLS-II) linear accelerator (LINAC) functions as a full-energy injector, accelerating electron beams to 3 GeV for injection into the storage ring. Maintaining LINAC stability is essential for reliable top-up operation of the storage ring. Until 2023, achieving the target energy of 3 GeV required operating the modulators near their voltage limits, which posed...
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Motoki Sato (High Energy Accelerator Research Organization)MC2.A02: Electron linac projectsPoster Presentation
At the Accelerator Test Facility (ATF) at KEK, research and development of beam control and diagnostic techniques is being carried out toward the realization of nanometer-scale beams required for the International Linear Collider. Since nanobeam tuning requires the adjustment of many parameters under limited machine time and human resources, efficient optimization methods are essential. In...
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Mr Rajeshwar Singh Sandha (Raja Ramanna Centre for Advanced Technology)MC2.A05: Industrial and medical acceleratorsPoster Presentation
Over the past decades, Indian laboratories have developed accelerators for industrial and medical applications. RRCAT and BARC have built industrial RF electron linacs and DC accelerators, while SAMEER and VECC have developed medical accelerators, including electron linacs and cyclotrons. Industrial uses include waste and wastewater treatment, food and agricultural processing, mutation...
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Changbum Kim (Pohang Accelerator Laboratory)MC2.A04: FELsPoster Presentation
PAL-XFEL is a fourth-generation X-ray free-electron laser based on an RF photoinjector, linac, bunch compressors, and undulators. Since 2017, user service has been provided through the SX and HX1 beamlines, delivering electron energies up to 11 GeV. To expand capacity, a second hard X-ray beamline (HX2, 2–10 keV) is proposed, designed for 180–200 pC operation at 30 Hz during simultaneous...
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Victor Cajus Kröger (Deutsches Elektronen-Synchrotron DESY)MC4.A05: Other technologyPoster Presentation
Insulation imperfections in high-voltage capacitors can trigger partial discharge (PD) activity, driving degradation and ultimately causing failure. This study investigates the relative assessment of PD activity in high-voltage capacitors, combining experimental PD measurements on two distinct capacitor types with the visual inspection of a failed unit. Due to the limited suitability of PD...
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Won Hee Min (Chungnam National University, Institute for Basic Science)MC4.A05: Other technologyPoster Presentation
RAON uses EPICS to integrate local control systems into central control. Technical notes for system installation and management are documented in TeX format and managed with relevant code and files in a Git-based configuration management environment on an internal network. This study examines the applicability of Retrieval-Augmented Generation (RAG) to control system technical documents for...
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Eric Viklund (High Energy Accelerator Research Organization)MC4.A08: Superconducting RFPoster Presentation
To support the ILC Technology Network(ITN) Cryomodule project at KEK, we have constructed and assembled six single cell cavities and one 9-cell cavity for vertical testing (VT). A series of surface treatment were applied to the cavities using the proposed recipe for the construction of the International Linear Collider (ILC). This recipe consists of four steps: bulk electropolishing (EP),...
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Daniel Noll (European Spallation Source)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The European Spallation Source (ESS) aims to be the world's brightest neutron source, designed to delivering 2 GeV protons at 5 MW to a rotating Tungsten target via a 600 m-long superconducting linear accelerator. At the present installation phase, with 82 of the total 146 cavities available in the superconducting linac, a beam of 800 MeV (2 MW) can be produced. During the first half of 2026,...
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Prof. Xiaodong Yang (Institute of Modern Physics, Chinese Academy of Sciences)MC2.A01: CollidersPoster Presentation
In the cooling storage ring, a low-temperature electron beam from the electron cooling device overlaps with a high-temperature ion beam in the storage ring. The overlap occurs at the same average velocity for a certain distance. Through Coulomb interaction, electrons absorb excess energy from ions. This reduces the transverse emittance and longitudinal momentum spread of the ion beam, and...
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Zhongtian Liu (Chinese Academy of Sciences)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
High-brightness, ultra-low emittance electron beams are essential for XFELs, UED, and UEM. Cryogenic RF copper structures enable higher breakdown thresholds and accelerating gradients, opening new possibilities for ultra-bright sources.
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We present the design and optimization of a compact, fully cryogenic injector integrating a C-band (5712 MHz) RF gun and accelerating structure at 77 K,... -
William Bishop (University of Warwick, Science and Technology Facilities Council)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Muon colliders are next-generation accelerators proposed for the future of particle physics, but their development faces limitations throughout the system, with new innovations required to achieve the desired performance. The focus here is on the target system which needs to withstand multi-MW pulsed proton beams to produce muons through pion decay. The target system must have long-term...
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Yulin Ge (Sun Yat-sen University)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
RFQ design involves strong parameter coupling, multi-physics interactions, and multiple optimization constraints. To address these challenges, this work develops a physics-informed genetic optimization framework for RFQ beam dynamics and electromagnetic design.
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By incorporating evolutionary rules associated with modulation factor, synchronous phase, and focusing strength, the framework... -
Dr S V L S Rao (Bhabha Atomic Research Centre)MC3.A04: Proton linac projectsPoster Presentation
For the Indian Accelerator Driven System (ADS) program, after gaining experience on low energy front end of the accelerator, comprising of proton ion source, RFQ and DTL, as well as on development of superconducting cavities, there is a plan to develop a Medium Energy High Power linear accelerator (MEHIPA), as phase-1 for the Indian (IADS) accelerator. The speaker will present the project plan...
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Andrea Passarelli (European Spallation Source)MC4.A08: Superconducting RFPoster Presentation
Plasma processing is increasingly recognized as an effective technique for mitigating field emission and restoring the performance of SRF cavities. A collaboration between CEA, ESS and INFN is currently working to adapt and optimize this method for the medium- and high-beta elliptical cavities installed in the ESS linac.
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This contribution summarizes ongoing efforts to implement plasma... -
Wentian Xue (Shanghai Institute of Applied Physics)MC4.A08: Superconducting RFPoster Presentation
In this study, we conduct plasma processing experiments to improve performance of hydrocarbon contaminated mid-T baked cavities. Field emission is one of the main factors that limit performance of superconducting radiofrequency cavities. To mitigate the impact of FE, we conducted experimental research on a dedicated mid-T baked 1.3 GHz single-cell cavity equipped with two higher order mode...
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Deepak Raparia (Brookhaven National Laboratory)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
Abstract
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The OPPIS has undergone multiple upgrades since 2000, with the most recent completed in 2022. Improvements to the Rb and Na cells have reduced vapor dispersion in the beamline, significantly lowering consumption and improving source stability. Plasmatron modifications extended component lifetimes. These upgrades enabled reliable Run-24 operation, with a mean current of 350 µA, 300 µs... -
Spencer Gessner (SLAC National Accelerator Laboratory)MC1.A04 Plasma and wakefield accelerationPoster Presentation
The talk will detail pioneering work at SLAC’s FACET-II on using tailored, hollow plasma channels to create stable and efficient wakefields for accelerating positron beams—a longstanding and formidable challenge in plasma wakefield acceleration (PWFA) which has predominantly focused on electrons. This represents a critical step toward a viable, high-gradient positron source for a future linear...
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Robert Laxdal (TRIUMF)MC3.A04: Proton linac projectsPoster Presentation
The Accelerator community needs to evolve to more efficient
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technologies and support R&D to reduce total energy consumption. This requires a change in culture - we need to focus on energy
efficiency with the same priority as achieving higher performance. Some linac installations like those for Accelerator Driven Systems (ADS) are advertised as being powered by the nuclear energy they produce... -
Seunghyun Lee (Korea Multi-purpose Accelerator Complex)MC3.A04: Proton linac projectsPoster Presentation
The proton accelerator, operational since 2013, has consistently achieved over 3,000 annual operating hours, providing 100 MeV proton beams to users. Increased demand from the semiconductor industry for testing and evaluation necessitates an energy upgrade to 200 MeV, aiming to enhance performance and support advanced materials industries.
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The design for this extended linac is based on a... -
雨瑄 杨 (China Spallation Neutron Source)MC3.A06: Room temperature structuresPoster Presentation
The development of compact and efficient low-energy linear accelerators is crucial for advanced scientific and medical applications. While H-mode Drift Tube Linacs (DTL) offer superior shunt impedance compared to conventional Alvarez structures, they traditionally suffer from transverse defocusing and longitudinal instability when operating at a 0$^\circ$ synchronous phase. This paper presents...
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Yue Yuan (Institute of High Energy Physics)MC3.A04: Proton linac projectsPoster Presentation
The China Spallation Neutron Source (CSNS) passed national acceptance in 2018. Construction of the Phase‑II upgrade began in 2024 and will increase the beam‑on‑target power from 100 kW to 500 kW and raise the linac exit energy from 80 MeV to 300 MeV. The planned Phase‑III upgrade will replace the current drift‑tube linac (DTL) downstream of the radio‑frequency quadrupole (RFQ) with a...
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Dr Eunhun Im (Institute for Basic Science)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
Preparation of the major subsystems is underway for the beam extraction test of the 28 GHz ECR ion source under 18 GHz operating conditions. For the superconducting magnet, ramp-up tests are being conducted to ensure stable operation under the target operating conditions. For plasma generation, the gas injection system and the RF injection system using an 18 GHz klystron are being prepared....
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Heishun Zen (Kyoto University)MC2.A04: FELsPoster Presentation
Kyoto University Free Electron Laser (KU-FEL) facility has been developed for energy-related research by the Institute of Advanced Energy, Kyoto University. There are two accelerator-driven infrared coherent light sources in the facility. One is the oscillator-type FEL whose wavelength range is 3.4 to 26 micro-m*. The other one is the THz-Coherent Undulator Radiation (THz-CUR) source whose...
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Hayato Ito (High Energy Accelerator Research Organization)MC4.A08: Superconducting RFPoster Presentation
Nb$_3$Sn is one of the most promising materials for next-generation superconducting radio-frequency (SRF) cavities, as it enables high-Q operation at 4 K. This feature opens the possibility of conduction-cooled SRF systems without liquid helium. At KEK, Nb$_3$Sn coating development based on the Sn vapor diffusion method has been in progress since 2019, with continuous improvements in cavity...
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Han Xiao (Institute of High Energy Physics)MC4.A06: RF power sources and power couplersPoster Presentation
High-efficiency klystrons can significantly reduce the operational costs of particle accelerators. However, for the of low-duty-factor klystrons commonly used in linear accelerators, the power consumption of electromagnetic focusing coils remains non-negligible. This paper presents the progress of an S-band 50 MW high-efficiency klystron employing periodic permanent magnet (PPM) focusing...
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Lars Groening (GSI Helmholtz Centre for Heavy Ion Research)MC3.A02: Ion linac projectsPoster Presentation
The Alvarez-type post-stripper DTL at GSI accelerates intense ion beams with A/q≤8.5 from 1.4 to 11.4 MeV/u. After more than 45 years of operation, it suffers from aging and its design does not meet the requirements of the upcoming FAIR project. Series production of the new DTL Alvarez 2.0 is ongoing. In 2025, the last out of 25 cavity sections, forming five cavities, underwent the site...
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Mr S Raghavendra (Raja Ramanna Centre for Advanced Technology)MC3.A07: Superconducting structuresPoster Presentation
RRCAT has developed the complete infrastructure for forming, machining, electron beam welding, processing and testing of superconducting RF cavities. Recently, the indigenously developed 5-cell, 650 MHz cavity has been tested in the Horizontal Test Stand up to an acceleration gradient of 20 MV/m in CW mode, with all in-house facilities. This facility will be useful for delivering SRF cavities...
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Buse Naz Temizel Ozdemir (Northern Illinois University)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
We present progress on a feedback control system for real-time optimization of five transverse wigglers to generate a sawtooth phase-space correlation. A recently proposed transverse wiggler-based correlation control method requires simultaneous tuning of 5-10 wigglers, each with three control variables (phase, amplitude, and period), which makes the tuning challenging. An upcoming experiment...
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Brahim Mustapha (Argonne National Laboratory)MC3.A02: Ion linac projectsPoster Presentation
The ongoing multi-user upgrade of the superconducting ion linac, ATLAS at Argonne, will enable simultaneous acceleration and delivery of two different ion beams to different experimental areas. One nearly continuous stable beam from the ECR ion source and one pulsed radioactive beam from the EBIS charge breeder of nuCARIBU will be interleaved in time via an electrostatic deflector at injection...
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Sungbin Park (Korea Multi-purpose Accelerator Complex)MC3.A04: Proton linac projectsPoster Presentation
As a possible option for 200 MeV energy upgrade in Korea Multi-purpose Accelerator Complex (KOMAC), separated drift tube linac (SDTL) type is considered. In this study, a prototype drift tube for the SDTL is developed and tested. Based on the optimum cell parameters, detailed design of drift tube is derived. Especially, cooling channels of the drift tube consist of central and side channels to...
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Mouda Tung (Lawrence Berkeley National Laboratory)MC2.A06: Other electron acceleratorsPoster Presentation
With the maturity of additive manufacturing (AM), it has been implemented in the production of accelerator components. A particular strength for AM is the optimization of internal geometries that is impossible to achieve with traditional means. A prototyping concept for a high-heat-load vacuum chamber section for the ALS-U project was manufactured using laser powder bed fusion in both CuCrZr...
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Andrew Chrysler (Los Alamos National Laboratory)MC4.A05: Other technologyPoster Presentation
The chopper pulsed power system at LANCE is a high speed, fast rise device which
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performs chopping operations in the medium energy beam transport. The chopper consists
of a negative and a positive pulse modulator which work synchronously to deliver pulses to
slow wave structures in the beamline. In the beamline, the pulse voltages sum in the
electric field which deflects H- beam under... -
Dr Xiaonan Du (GSI Helmholtz Centre for Heavy Ion Research)MC4.A07: Room temperature RFPoster Presentation
A novel bead-falling measurement method is proposed for precise and efficient electromagnetic field mapping in RF cavities for particle accelerators. Unlike the conventional bead-pull technique, which uses a complex wire-pulley system prone to perturbations and mechanical errors, this method employs free-falling beads to simplify the setup and significantly improve accuracy.A compact portable...
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Jiaru Shi (Tsinghua University)MC3.A06: Room temperature structuresPoster Presentation
X-band high-gradient accelerating technology is a key innovation for building more compact linacs. A prime example is the Very Compact Inverse Compton Scattering Gamma-ray Source (VIGAS) at Tsinghua University -- a light source where a high-quality electron beam, accelerated to over 320 MeV by X-band structures, collides with a laser pulse to generate tunable gamma-rays with photon energies up...
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Michael Mayerhofer (Universität der Bundeswehr München)MC4.A05: Other technologyPoster Presentation
Compared with subtractive manufacturing methods such as CNC machining, additive manufacturing (AM) enables the fabrication of highly complex monolithic geometries. As a result, AM can improve functionality and reduce manufacturing costs. For linear accelerator (linac) components, this potential has been demonstrated in a growing number of studies and prototype developments. At the same time,...
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Yiheng Ye (SLAC National Accelerator Laboratory)MC1.A04 Plasma and wakefield accelerationPoster Presentation
Emittance preservation is one of the biggest challenges in beam-driven plasma wakefield acceleration (PWFA), demanding extremely precise control of the transverse aspect of the electron beam. We will talk about recent experimental progress in transverse control and optimization for the PWFA experiment at FACET-II in order to demonstrate a collider-quality PWFA stage. We will talk about various...
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Erin Chen (Fermi National Accelerator Laboratory)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Quadrupole scans are a commonly used tool for beam second moment reconstruction. Limitations in the strength of the magnets and layout of the beamline elements frequently preclude simple quadrupole-drift-detector scans from collecting sufficient data for reconstruction. Using a normalized coordinate framework, we characterize the prerequisites for a robust simple quadrupole scan and expand...
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Chong Shik Park (Korea University Sejong Campus)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Precise orbit control in low- and medium-energy beam transport sections is essential for efficient beam delivery in heavy-ion linacs. In the RAON accelerator, the LEBT and MEBT sections are strongly affected by space charge effects, nonlinear beam dynamics, and variations in beam conditions, limiting the performance of conventional correction methods. In this work, we develop a reinforcement...
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GHAZAL RAO (Institute of High Energy Physics)MC4.A07: Room temperature RFPoster Presentation
Enhancing the accelerating gradient of electron linacs reduces facility size and cost. For the 100-km CEPC Higgs-factory ring, injector linac gradient is a critical parameter because, once final beam energy is fixed, accelerating gradient determines linac length and strongly influences overall system design. C-band accelerating structures are considered for the CEPC high-energy injector...
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Jinghe Yang (China Institute of Atomic Energy)MC3.A04: Proton linac projectsPoster Presentation
Proton linear accelerators are crucial in spallation neutron sources, CANS, proton therapy, etc. DTL, especially Alvarez-type, accelerates intense pulsed proton beams from several to tens of MeV. To meet CANS demands for higher time resolution and peak brightness, DTL must handle high-current pulsed beams. Improved DTL variants like IH and CH have been developed. IH-DTL suits lower-energy...
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Liang Lu (Sun Yat-sen University)MC1.A03 Other beamsPoster Presentation
Atmospheric muon imaging has low efficiency due to low flux (~70 m⁻²·s⁻¹·sr⁻¹ at 0° zenith), requiring long acquisition. This paper proposes two magnetic focusing systems to enhance muon flux and reduce collection time: a three-section superconducting solenoid and a triplet quadrupole lens (short- and long-range focusing). The solenoid has inlet (1m/0.5m/5.5T), middle (0.75m/1m/3.5T), outlet...
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Liang Lu (Sun Yat-sen University)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
The laser ion source (LIS) features a compact design, straightforward operation, and ease of maintenance. In this work, an inner-assembled solenoid is employed to confine the ion beam, thereby mitigating plasma expansion and reducing ion loss. The influence of laser power density on peak current, pulse width (FWHM) and total charge of Al, Cu, Fe and Ni ion beams in the range of 350 mJ-1450mJ...
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Zhijun Wang (Institute of Modern Physics, Chinese Academy of Sciences)MC3.A04: Proton linac projectsPoster Presentation
As the driver of the world's first under-construction Accelerator-Driven Subcritical System (ADS), the CIADS linear accelerator adopts an all-superconducting continuous wave (CW) technical route, with a designed beam current of 5 mA and energy of 500 MeV. This report presents the research on two core issues of the CIADS linear accelerator: beam loss and system reliability. It also provides the...
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Bum-Sik Park (Institute for Basic Science)MC3.A05: RFQsPoster Presentation
The Institute for Rare Isotope Science (IRIS) has developed and is operating an 81.25 MHz Radio Frequency Quadrupole (RFQ) equipped with two power couplers. Due to small installation errors, the two couplers exhibit slightly different coupling factors (β). As a result, the reflected powers from two couplers become unbalanced depending on the operating temperature of the Resonance Control...
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Changda Peng (Huazhong University of Science and Technology)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
High brightness and low transverse emittance are essential for achieving high signal-to-noise ultrafast electron diffraction (UED). In practice, however, asymmetries in the RF gun cavity and misalignments of the focusing solenoid introduce residual stray quadrupole fields, leading to transverse phase-space coupling that degrades beam quality and limits UED performance.Here we use a compact...
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Yuga Nakazawa (High Energy Accelerator Research Organization)MC4.A06: RF power sources and power couplersPoster Presentation
The development of a muon-dedicated traveling-wave disk-loaded structure (DLS) is in progress at the Japan Proton Accelerator Research Complex (J-PARC). Accelerating ultraslow muons to relativistic energies preserves low beam emittance and improves penetration capability, enabling new opportunities in precision particle physics experiments and muon imaging. However, unlike electrons, muons...
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Shahnam Gorgi Zadeh (European Organization for Nuclear Research)MC4.A08: Superconducting RFPoster Presentation
The higher-order mode (HOM) power generated in the 2-cell 400 MHz superconducting cavities and associated auxiliary components of the FCC-ee at the Z working point, with a beam current of 1.28 A, is estimated to reach approximately 60 kW per four-cavity cryomodule. Efficient extraction of this power is essential to ensure stable operation and to limit the thermal load on the cryogenic system....
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Pablo Martinez Reviriego (European Organization for Nuclear Research)MC2.A02: Electron linac projectsPoster Presentation
The high-energy linac of the Future Circular Collider electron–positron (FCC-ee) injector requires high-performance RF accelerating structures to efficiently reach 20 GeV with stable operation. A tapered travelling-wave structure operating at 3 GHz has been designed to optimize accelerating performance and suppress wakefields.
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This work focuses on the development of a full 3D model of the... -
Jindong Liu (Chinese Academy of Sciences)MC2.A01: CollidersPoster Presentation
To enhance the energy efficiency and cost-effectiveness of large-scale particle accelerator facilities, energy recovery has emerged as a key research direction. From the perspective of radio frequency (RF) power sources, this article reports on the latest research progress in this field at IHEP. First, the fundamental principles of energy recovery based on RF power sources are elaborated,...
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Andrea Passarelli (European Spallation Source)MC3.A04: Proton linac projectsPoster Presentation
Following the Beam on Dump (BOD) campaign, the European Spallation Source (ESS) is preparing for the subsequent BOD2 and Beam on Target (BOT) phases, which require higher levels of accelerator reliability, availability, and stability. Ensuring continuous operation demands not only effective maintenance but also advanced strategies for managing critical components.
This work focuses on RFQ...
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Andrea Latina (European Organization for Nuclear Research)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
This invited talk presents the current status and recent developments of RF-Track, a 6D macroparticle tracking code with modelling capabilities tailored to high-intensity injectors and linac-driven facilities. RF-Track targets machines operating at high brightness, high peak current, or high average power, where emittance preservation, halo control, and collective effects ultimately determine...
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Mr Yurii Lozeev (National Research Nuclear University MEPhI)MC3.A05: RFQsPoster Presentation
Over the past decade, several new generation radioactive isotope beam facilities have seen significant progress. Among them, FRIB, RIBF, and SPIRAL2 are already operational. RAON is currently undergoing commissioning, and HIAF is under construction. For brand‑new facilities that are not upgrades of existing ones, such as FRIB, RAON or HIAF, the operating frequency of the RFQ section is chosen...
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Wei Qin (Institute of Modern Physics, Chinese Academy of Sciences)MC3.A06: Room temperature structuresPoster Presentation
A novel 3 GHz single-periodic magnetically coupled standing-wave accelerating structure for β=0.26 particles with an optimized nose cone and six coupling holes was proposed for the compact proton therapy linac under development at the Institute of Modern Physics, Chinese Academy of Sciences (IMP, CAS). High-power tests demonstrated that the accelerating structure could operate stably at an...
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Wei Qin (Institute of Modern Physics, Chinese Academy of Sciences)MC3.A06: Room temperature structuresPoster Presentation
A novel 3 GHz single-periodic magnetically coupled standing-wave accelerating structure for β=0.26 particles with an optimized nose cone and six coupling holes was proposed for the compact proton therapy linac under development at the Institute of Modern Physics, Chinese Academy of Sciences (IMP, CAS). High-power tests demonstrated that the accelerating structure could operate stably at an...
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Jonathan Dumas (Commissariat à l'Energie Atomique)MC3.A07: Superconducting structuresPoster Presentation
SNRC and CEA are collaborating on developing SARAF Phase 2 to deliver 5 mA CW proton and deuteron beams up to 40 MeV. CEA is responsible for the design, fabrication and commissioning of the linac downstream of the RFQ. The linac includes four superconducting cryomodules (CM), comprising two low-β (β = 0.09) and two high-β (β = 0.18) units. All four cryomodules were successfully assembled and...
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Ana Durdevic (European Organization for Nuclear Research)MC4.A06: RF power sources and power couplersPoster Presentation
In fundamental power couplers for RF accelerators, secondary electron emission can give rise to multipacting (MP), leading to RF losses, heating, and performance degradation. A mitigation technique consists of superimposing an electrostatic DC field onto the RF field by applying a bias voltage between the inner and outer conductors of the coaxial power coupler. This approach alters electron...
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Chang-Kyu Sung (Pohang Accelerator Laboratory)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
X-ray free-electron lasers (XFELs) require electron beams with low emittance, high peak current, and low slice energy spread. In addition to these beam parameters, the longitudinal density profile is also crucial for high-performance FEL operation, since it affects stable beam transport to the undulator line by mitigating collective effects such as coherent synchrotron radiation, etc., as well...
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Dr Benzheng Chen (Institute of High Energy Physics, Chinese Academy of Sciences)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The Radio Frequency Quadrupole (RFQ) accelerator is a compact linear ion accelerator for high-current low-energy beams, widely used in particle physics, medical treatments, material research, and other fields. Currently, the RFQ primarily accelerates a single type of ion, utilizing only half a cycle of the input high-frequency power. Theoretically, the RFQ can also achieve two-beam...
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Zhiqiang Ren (Sichuan University)MC3.A05: RFQsPoster Presentation
Boron neutron capture therapy (BNCT) is attracting increasing attention. This paper presents the structural design and error analysis of a radio frequency quadrupole (RFQ) accelerator currently being fabricated for BNCT applications. The RFQ is designed to accelerate a 15 mA proton beam to 2.5 MeV, with a total length of 4.7 m divided into four segments, each approximately 1.2 m long. Various...
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Tao Zhang (Institute of Modern Physics)MC3.A05: RFQsPoster Presentation
This study aims to design a practical high-beam-current, high-transmission-efficiency Multi-Beam RFQ. Due to its complexity, current work focuses on a high-beam-current single-beam RFQ design and transverse stability analysis. Simplifying the RFQ transverse structure into a FODO periodic structure and combining the envelope equation with Floquet analysis, we study transverse beam stability,...
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Yaodan Hu (Huazhong University of Science and Technology)MC4.A01: Beam diagnosticsPoster Presentation
Precise characterization of the vectorial properties of THz electromagnetic wave packet serves as the essential foundation for materials electromagnetics research and accelerator physics. The complete vectorial properties of THz electromagnetic waves encompass the complex amplitude, the polarization, and the magnetic field characteristics. However, few current methods enable the complete...
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Zhuang Bi (Kyoto University)MC2.A04: FELsPoster Presentation
Extraction efficiency is a key parameter for oscillator FELs. To evaluate it in a single macro-pulse, both electron beam energy evolution with and without FEL lasing must be known. Previously, we developed a secondary electron emission monitor (SEEM) to measure the temporal energy evolution after the undulator with and without FEL lasing*. Since SEEM requires separate measurements with and...
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Andrew Chrysler (Los Alamos National Laboratory)MC4.A05: Other technologyPoster Presentation
This work discusses recent developments towards remanufacturing and improvement of the
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IGBT-based, CLIA compact Solid-State Marx Generator (SSM). The CLIA SSM as described in 2010
produced a 48-kV, 160-A, 5-usec square pulse at a 50-Hz rep rate to drive a magnetron. The new
upgrade will be a 48-kV, 110-A, 5-usec square pulse in a 200-Hz rep rate. The CLIA circuit
topology is posiVve... -
Jack Hirschman (Stanford University, SLAC National Accelerator Laboratory)MC2.A04: FELsPoster Presentation
Next-generation x-ray free-electron lasers will push ultrafast science to ultra-high repetition rates,* demanding flexible upstream control that adapts electron-beam properties in real time. The photoinjector laser (PIL), defining the electron beam's initial phase-space, represents a powerful and largely untapped actuator. We present results from a coordinated campaign at LCLS-II demonstrating...
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Ms Pallavi Priyadarshini (Bhabha Atomic Research Centre)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
A thorough experimental as well as theoretical study of space charge compensation for transport of 50 keV proton beam in the Low Energy Beam Transport (LEBT) line from ion source to RFQ has been done for the 20 MeV Low Energy High Intensity Proton Accelerator (LEHIPA) at BARC. A novel particle monitor probe for fast plasma diagnostics has been used for space charge compensation investigations...
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Wei Li (Institute of High Energy Physics)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Beam-driven plasma wakefield acceleration (PWFA) is a promising strategy for future high-energy electron–positron colliders. A critical challenge remains the generation of high-charge, highly stable double-bunch beams, as current methods often suffer from significant charge loss or charge limitations. In this paper, we propose a coherent synchrotron radiation (CSR)-free beam-merging scheme...
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Antonio Gilardi (European Organization for Nuclear Research)MC2.A02: Electron linac projectsPoster Presentation
CLEAR (CERN Linear Electron Accelerator for Research) is a versatile electron beam user facility operating at CERN, providing beams with energies up to 200 MeV across a broad range of bunch charges, emittances, and timing configurations.
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The facility serves a diverse and growing internal and external user community, supporting a wide experimental program spanning multiple domains of... -
Xingguang Liu (Chinese Academy of Sciences)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
A C-band test platform has been built at IHEP-Dongguan for studies of high-gradient RF structures and advanced beam manipulation techniques toward future light source projects. Prototypes of 3.6-cell C-band RF photocathode gun achieved high-power operation close to 150 MV/m and beam extraction at about 137 MV/m cathode gradient, representing the first reported beam extraction from a C-band RF...
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Dr Hendrik Hähnel (Goethe University Frankfurt)MC1.A03 Other beamsPoster Presentation
A compact neutron source comprising an RF-coupled RFQ and IH-cavity followed by a CH-cavity shall provide a neutron flux of 10^11 n/sec from primary protons at 2.0 MeV. The last two years saw intense efforts w.r.t. finalization of the beamline installation and its commissioning. A special challenge has been RF-tuning and high-power operation of the RF-coupled RFQ and IH-cavity.
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Maximilian Schuett (GSI Helmholtz Centre for Heavy Ion Research)MC3.A04: Proton linac projectsPoster Presentation
The proton linear accelerator (p-LINAC) is envisaged as the injector for the antiproton physics program at the FAIR facility in Darmstadt, Germany. The p-LINAC is designed to deliver a beam current of 70 mA at an energy of 68 MeV with a repetition rate of 4 Hz. The ion source has been developed in collaboration with CAE. The Ladder RFQ was designed by IAP Frankfurt, as were the...
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Dr Klaus Kuempel (Goethe University Frankfurt)MC3.A05: RFQsPoster Presentation
The IAP (Institute for Applied Physics) of the Goethe University Frankfurt has a long experience in the development of 4-Rod RFQs. In the course of a project funded by the Hessen Agentur as part of LOEWE funding line 3, the basic design of the 4-rod RFQs is now to be further developed. The aim is to investigate whether an improvement in Q-Value and vacuum can be achieved through new production...
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Frank Marhauser (Belgian Nuclear Research Centre)MC4.A08: Superconducting RFPoster Presentation
The qualification of the Minerva/Myrrah single spoke cavities is well advanced.
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Contribution should cover current status, performance statistics, challenges during the production and qualification and the path to cryomodule development and testing. -
Riccardo Boldrini (Sapienza University of Rome)MC3.A01: Industrial and medical acceleratorsPoster Presentation
FLASH radiotherapy is emerging as a transformative cancer-treatment modality, achieving tumor control while reducing normal-tissue toxicity and improving the therapeutic index. To exploit this effect, especially for deep-seated tumors, Very High-Energy Electrons (VHEE) in the 50–150 MeV range are required. Within the SAFEST project, aimed at a 100 MeV machine, Sapienza University of Rome, with...
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Mathieu Omet (High Energy Accelerator Research Organization)MC4.A08: Superconducting RFPoster Presentation
An ILC prototype cryomodule is presently being assembled at KEK, incorporating eight superconducting 1.3 GHz TESLA cavities. Accurate tuning and stable control of the resonance frequency of these narrow-bandwidth cavities, both prior to and during operation, require dedicated cavity tuners. The tuner concept is derived from the LCLS-II design. The specific requirements of the ILC prototype...
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Myung Ook Hyun (Institute for Basic Science)MC4.A05: Other technologyPoster Presentation
The Rare Isotope Accelerator Complex for ON-line (RAON) under the Institute for Basic Science (IBS) is currently operating the low-energy linear accelerator section successfully, and is preparing for the construction of the high-energy linear accelerator section. The fabrication of superconducting (SC) cryomodule prototypes is underway. In conjunction, the cryogenic, RF, magnet, and vacuum...
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Ryan Bodenstein (Thomas Jefferson National Accelerator Facility)MC4.A05: Other technologyPoster Presentation
The proposed energy upgrade of the Continuous Electron Beam Accelerator Facility (CEBAF) incorporates Fixed-Field Alternating-gradient (FFA) arcs utilizing permanent magnet technology. Given the radiation environment within the CEBAF tunnel enclosure, validating the long-term magnetic stability of these materials is a critical step for the project's technical feasibility. This contribution...
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Pierrick Hamel (CEA, Paris-Saclay University)MC3.A05: RFQsPoster Presentation
High-power radio-frequency (RF) cavities, such as RFQs, may require multiple input couplers to circumvent the breakdown limit. With advances in semiconductor amplifiers, each coupler is often connected to a single source. Although all amplifiers are synchronized in amplitude and phase by an LLRF system, calibration or control errors may persist. These errors, along with disparities in the...
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Masahiro Okamura (Brookhaven National Laboratory)MC3.A01: Industrial and medical acceleratorsPoster Presentation
A beam dynamics study was carried out for a compact proton accelerator system under development for accelerator-driven neutron source applications in Hungary. The accelerator consists of a proton ion source, a low-energy beam transport line, and a 200-MHz 4-vane RFQ linac.
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Numerical simulations were performed to evaluate beam transport and acceleration from the ion source extraction region to... -
zongyang He (Shanghai Synchrotron Radiation Facility)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
This work investigates the feasibility of generating electron cyclotron resonance in an ion source by replacing the conventional solenoid-produced axial magnetic field with the axial magnetic field of a selected resonant cavity mode. The study focuses on the electromagnetic design of the cavity, the formation of the required axial field distribution, and its capability to establish resonance...
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Jie Zeng (Institute of Modern Physics, Chinese Academy of Sciences)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
High-power particle accelerator beams have important applications in many fields. Multi-terminal beam delivery can improve beam utilization, while the extremely high peak current density on the target surface limits the safe and stable operation of target stations. To meet the demand for simultaneous multi-terminal beam delivery, RF beam separation was studied. A scheme based on a RF...
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Dr Amichay Perry (Soreq Nuclear Research Center)Poster Presentation
Soreq Applied Research Accelerator Facility (SARAF) aims to deliver up to 5 mA proton/deuteron beams at energies up to 40 MeV. SARAF is primarily a continuous wave (CW) machine, and thus, machine studies so far focused mainly on the steady state beam properties. However, the beam commissioning of the superconducting linac (scheduled to start in Q2 2026) will naturally commence with a...
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Yuanshuai Qin (Institute of Modern Physics, Chinese Academy of Sciences)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
ADS is considered as an effective way for the transmutation of nuclear waste. With multi-beam injecting into multi-target in the reactor, neutron distribution will become uniform, which is beneficial to the the safety and economy of the reactor. With transverse field RF cavities, the adjacent micro bunches in CW beam could be deflectied to different directions and 2D beam splitting could be...
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Nireimathiyan Sundaram Somu (Facility for Rare Isotope Beams)MC4.A04: Low level RFPoster Presentation
Modern superconducting radio frequency (SRF) cavities possess extremely high Q factors often exceeding ten billion, which allows increased efficiency but presents an operational challenge due to detuning effects such as Lorentz force detuning and microphonics. Uncompensated detuning will dramatically increase radio frequency (RF) power consumption. To be operable, SRF cavities must lower the Q...
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Hao Hu (Huazhong University of Science and Technology)MC2.A02: Electron linac projectsPoster Presentation
The Main Linac of the Super Tau-Charm Facility (STCF) injector comprises 36 series-connected constant-gradient traveling-wave accelerating structures. Variations in injection timing induce complex coupling between the independent RF transient filling and transient beam loading effects, systematically altering the beam energy spread. As a bunch traverses successive structures, these localized...
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Weihang Liu (Institute of High Energy Physics)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Sub-femtosecond electron beams would provide a powerful probe of ultrafast electronic and nuclear dynamics, but their generation with both high beam energy and pC-level charge remains challenging. Conventional longitudinal compression requires a large energy chirp and becomes increasingly impractical for hundred-MeV beams, whereas low-energy approaches are strongly limited by space-charge...
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Dr Lance Cooley (National High Magnetic Field Laboratory)MC4.A05: Other technologyPoster Presentation
The workshop strengthened connections across disciplines—linking accelerator physics, materials science, and engineering—and to mentor the next generation of researchers.
The event showcased new approaches in epitaxial photocathodes, including ultra-thin alkali antimonide and telluride films with improved quantum efficiency and durability. Researchers also shared progress on protective...
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Xinyuan Feng (Institute of High Energy Physics)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
This paper presents a compensation algorithm based on a Multi-Objective Genetic Algorithm (MOGA) for recovering beam parameters in high-intensity superconducting proton linacs when one or more radio-frequency cavities degrade or fail. The algorithm directly adjusts the amplitude and phase of adjacent or all cavities to restore the beam energy and energy spread at the linac exit. Compared with...
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Mr Benzheng Chen (Institute of High Energy Physics)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The contribution shall be on simulation of space charge compensation within a H- - LEBT beam. Special emphasis is put on revealing the relevance secondary electrons w.r.t. the relevance of secondary ions, both created in collisions of beam ions with hydrogen molecules of the residual gas. The build-up of space charge compensation is calculated time-wise as well as its 3d-distribution. Two...
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Konstantin Popov (Institute of Nuclear Physics)MC3.A03: Other proton/ionPoster Presentation
The tandem accelerator complex UKP-2-1 is double-ended electrostatic accelerator located at Kazakhstan. The accelerator complex contains 2 independent beamlines, which share a common 1 MV high voltage terminal, nitrogen pressure vessel and gas stripper. The first beamline is dedicated to supply continuous proton beam for surface and depth distribution analysis. The analysis is conducted at the...
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Spencer Gessner (SLAC National Accelerator Laboratory)MC2.A01: CollidersPoster Presentation
The 10 TeV Wakefield Collider Design Study responds to the P5 Report's call for the ``delivery of an end-to-end design concept, including cost scales, with self-consistent parameters throughout." The Design Study leverages recent experimental and theoretical progress. Wakefield Accelerators provide ultra-high accelerating gradients which enables an upgrade path to extend the reach of Linear...
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Alan Letchford (Science and Technology Facilities Council)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
Over the past four decades, the accelerator community has made substantial progress in advancing both normal-conducting and superconducting RF cavity design and fabrication technologies. As the global demand for new accelerator facilities continues to increase, the development of low-cost, high-efficiency RF cavities has become essential for ensuring the long-term sustainability of accelerator...
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John Schmidt (Los Alamos National Laboratory)MC3.A04: Proton linac projectsPoster Presentation
Proton radiography (pRad) has operated with 800 MeV protons from the Los Alamos Neutron Science Center’s LINAC since 1997. Having demonstrated its exceptional ability to see through high areal densities and high Z material, discussions are ongoing on best way to bring this facility into the future. Higher energy protons decrease multiple blur terms in the final radiographic image, and are...
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Morten Jensen (European Spallation Source)MC4.A06: RF power sources and power couplersPoster Presentation
ESS has achieved beam operation on the commissioning beam dump in 2025, after technical commissioning of the RF system providing RF power to the RFQ, 3 bunchers, 5 DTL tanks, 26 spoke cavities in 13 cryomodules and 56 elliptical cavities in 14 cryomodules of two different beta. 91 RF stations of different technologies (Klystrons, SSA and tetrodes) and two frequencies (352 MHz and 704 MHz)...
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Dr MengXu Fan (Institute of High Energy Physics, China Spallation Neutron Source)MC4.A06: RF power sources and power couplersPoster Presentation
The China Spallation Neutron Source upgrade project (CSNS-Ⅱ) uses 24 elliptical cavities in the LINAC section. Every cavity equipment a coaxial type fundamental power coupler with a character impedance of 50 Ohm and fixed coupling antenna. In this paper, the multiphysic design contain the electromagnetic optimization, the multipacting analysis, thermal and stress simulation, et al. will be...
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Prof. Holger Podlech (Goethe University Frankfurt, HFHF - Helmholtz Research Academy Hesse for FAIR, Campus Frankfurt)MC3.A04: Proton linac projectsPoster Presentation
Neutrons are an essential tool for studying the structure and dynamics of matter. The High Brilliance Neutron Source (HBS) project aims to develop a scalable Compact Accelerator-driven Neutron Source that will enable neutron fluxes at the corresponding instruments comparable to existing fission-based or spallation neutron sources. After positive project evaluation in 2025, the German Science...
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Dr Sergey Vaintraub (Soreq Nuclear Research Center)MC3.A04: Proton linac projectsPoster Presentation
The Soreq Applied Research Accelerator Facility (SARAF) is advancing to Phase II to deliver continuous wave proton and deuteron beams (5-40 MeV, ~5 mA). Handling the resulting ~200 kW beam power requires a robust dump capable of dissipating high power densities. To meet this challenge, a windowless liquid Gallium-Indium (Ga-In) jet target, GaLiT,* was designed. It generates a stable ~5 m/s...
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Dr Reza Kazimi (Thomas Jefferson National Accelerator Facility)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
The Continuous Electron Beam Accelerator Facility at Jefferson Lab recently underwent a significant injector upgrade to meet the stringent beam quality requirements of upcoming physics experiments and to enhance system reliability. Key modifications include replacing the 130 kV DC photo-cathode gun with a 200 kV version and installing a new SRF booster consisting of 2-cell and 7-cell cavities....
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Cong Zhang (Institute of High Energy Physics)MC4.A08: Superconducting RFPoster Presentation
The 80–300 MeV accelerating section of the CSNS-II linac is a superconducting accelerator, consisting of 10 double spoke modules and 8 elliptical cavity modules.For a user facility, the downtime associated with removing the module from the linac and returning it to the cleanroom for rinsing and reconditioning is unacceptable. Therefore, it is necessary to develop on-line performance recovery...
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Bruce Yee-Rendon (Japan Atomic Energy Agency)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
In recent years, the Japan Proton Accelerator Research Complex (J-PARC) has completed the design report for a Proton Beam Irradiation Facility (PBIF). This facility will be used for material irradiation, the manufacturing of medical radioactive isotopes, testing semiconductor soft errors, and providing proton beams for space applications, utilizing the H- beam generated by the J-PARC linac....
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Yanliang Han (Institute of High Energy Physics)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The CSNS is undergoing a beam power upgrade from 100~kW to 500 kW. In order to adapt this beam power upgrade, the beam current in the linac has to be increased from 10 mA to 40~mA and the beam energy has to be increased from 80 MeV to 300 MeV. Therefore, the ion source, RFQ and will be replace and 44 new superconducting cavities will be installed. During the new element installation, there is...
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Taekheon Kim (National Security Research Institute)MC4.A06: RF power sources and power couplersPoster Presentation
Microwave pulse compressors(MPCs) are used in linear accelerator RF systems to enhance peak power, as well as in other high power RF application such as IEMI testing. This paper presents a theoretical and experimental study on a low-power active MPC employing a spark gap switch. In particular, the change of resonant frequency as a function of spark gap length in an active MPC structure...
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Eduardo Moraes Ferrari (Brazilian Center for Research in Energy and Materials)MC3.A04: Proton linac projectsPoster Presentation
The design optimization of RFQ and DTL cavities involve expensive black-box simulations, difficult constraints coming from simulation failures and the absence of reliable derivative information. These characteristics make derivative-free optimization methods particularly interesting, yet their practical performance in a conjoint RFQ-DTL cavity design optimization remains insufficiently...
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Yimeng Chu (Institute of Modern Physics)MC2.A02: Electron linac projectsPoster Presentation
Superconducting radio-frequency (SRF) electron linear accelerators provide significant advantages for high-current beam acceleration and continuous-wave (CW) operation, but their miniaturization is limited by the requirement for large liquid helium cryogenic infrastructures. A liquid helium-free Nb₃Sn SRF cavity recently developed at the Institute of Modern Physics (IMP), eliminates the need...
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Yusuke Takeuchi (Nagoya University)MC1.A03 Other beamsPoster Presentation
This study investigates the transient evolution of accelerating fields in traveling-wave disk- loaded structures for muon acceleration driven by realistic RF pulse waveforms generated by a spherical cavity pulse compressor. Such compressed RF pulses may deviate significantly from an ideal flat-top profile due to transient effects associated with the energy storage and release process in the...
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Dong-O Jeon (Institute for Basic Science)MC3.A03: Other proton/ionPoster Presentation
This work compares results from transverse tomography based on profile measurements with results from Allison scanners. It considers perturbing effects from non-linear (dipole) fields and space charge.
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Thomas Lucas (Paul Scherrer Institute)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersPoster Presentation
Approximately 35 years after it was first conceptualised, a one-of-a-kind travelling-wave RF photogun has been designed, realised, and tested, achieving cathode peak fields of up to 180 MV/m. Installed at the C-band test stand at PSI, the system demonstrates robust and reliable high-power operation. We present an overview of the RF design, the unique tuning-free realisation, and the results of...
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Yiheng Ye (SLAC National Accelerator Laboratory)MC1.A04 Plasma and wakefield accelerationPoster Presentation
Generation and control of two electron bunches to achieve desired drive and witness quality is crucial for plasma-wakefield acceleration (PWFA) experiments. One scheme to generate two electron beams with desired spacing is to apply two laser pulses with ps delay on the photocathode and co-accelerated two electron beams in the same RF bucket. Such a method is used in e.g. two-color FEL and PWFA...
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Zachary Liptak (Hiroshima University)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
In particle accelerators, full knowledge of the six-dimensional (6D) beam phase space is crucial but difficult to obtain with conventional beam diagnostics. We have developed a two-stage convolutional neural network (CNN) that reconstructs the 6D phase space from only sixteen transverse x − y screen images taken at a place with dispersion by different phase space rotation angles. With these...
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Tylor Sové (Canadian Light Source (Canada))MC2.A02: Electron linac projectsPoster Presentation
In 2024 the Canadian Light Source (CLS) retired its ∼60 year old 2856 MHz, 250 MeV injector electron LINAC, and replaced it with a 3000 MHz LINAC designed and built by RI Research Instruments GmbH. The design includes a SLAC Energy Doubler (SLED) system to power two of the three main accelerating structures and is intended to produce a beam of the same energy. Many setbacks were encountered...
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Ersin Cicek (High Energy Accelerator Research Organization)MC4.A04: Low level RFPoster Presentation
At J-PARC LINAC, cavity phase monitors (CPMs) monitor RF phase variation between neighboring cavities; existing system remains reliable but requires dedicated hardware per station and supports only two RF inputs per monitor. As LLRF DFB system has been upgraded from cPCI to MicroTCA.4, RF pickup signals are aggregated in a common rack, requiring CPM upgrade to multi-channel monitoring; as an...
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Chengcheng Xiao (Shanghai Advanced Research Institute, Chinese Academy of Sciences)MC4.A04: Low level RFPoster Presentation
The X-band linearizer at the Shanghai Soft X-ray Free-Electron Laser (SXFEL) is used to compensate the nonlinear energy chirp of the electron beam and requires a highly stable low-level radio-frequency (LLRF) system. To improve the performance of the X-band RF system, the LLRF chain was upgraded in three aspects: the clock and local-oscillator electronics, the X-band solid-state power...
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Rong-Li Geng (Thomas Jefferson National Accelerator Facility)MC2.A02: Electron linac projectsPoster Presentation
User operation of the Nb3Sn cryomodule at JLAB will be described.
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Qiao Luo (Huazhong University of Science and Technology)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
We propose a scheme for generating femtosecond to sub-femtosecond ultrafast electron bunches by combining undulator technology with terahertz (THz) modulation. A theoretical model has been developed to describe the transport dynamics of relativistic electrons interacting with THz modulation fields and longitudinal space charge effects within the bunch. The proposed scheme successfully produces...
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Dr Yuki Abe (High Energy Accelerator Research Organization)MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The KEK-ATF is an R&D facility for the final focus system to develop nanometer beam technology for the International Linear Collider. The vertical beam size growth as a function of bunch intensity has been observed at the focal point (IP), mainly caused by wakefield effects. ATF provides an excellent environment for studying wakefield impacts on nanometer-scale beams. Mitigation and...
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Viatcheslav Grishin (European Spallation Source)MC4.A01: Beam diagnosticsPoster Presentation
The European Spallation Source (ESS) in Lund, Sweden, is a pulsed neutron source based on a proton linac. During beam commissioning in 2025, the 870 MeV protons of 6 mA current, 5 microsecond pulse length and 1 Hz repetition delivered to tuning beam dump.
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Beam Loss Monitoring (BLM) system is to protect the accelerator from beam-induced damage and unnecessary activation of the components....
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