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259. 4D transverse coupling measurements of an 18 MeV photo-injector electron beam at PITZ (THPO010)Christopher Richard (Deutsches Elektronen-Synchrotron DESY)20/08/2026, 16:00MC4.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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Prof. Ji-Gwang Hwang (Kangwon National University)20/08/2026, 16:00MC4.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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Julius Storch (Goethe University Frankfurt)20/08/2026, 16:00MC3.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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Ziga Kroflic (Cosylab)20/08/2026, 16:00MC4.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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Jiapeng Li (Huazhong University of Science and Technology)20/08/2026, 16:00MC1.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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Dmitry Kayran (Brookhaven National Laboratory)20/08/2026, 16:00MC1.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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189. Beam dynamics simulation and lattice optimization for the Siam Photon Source injector (THPO026)Dr Thakonwat Chanwattana (Synchrotron Light Research Institute)20/08/2026, 16:00MC1.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))20/08/2026, 16:001MC3.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)20/08/2026, 16:00MC1.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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387. Beam-Dynamics Design of a Zero-Phase Accelerating Linac with Electrode-Based Focusing (THPO069)guangxian li (Institute of Modern Physics)20/08/2026, 16:00MC3.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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Dou Wang (Institute of High Energy Physics, Chinese Academy of Sciences)20/08/2026, 16:00MC2.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)20/08/2026, 16:00MC2.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... -
Lei Du (Institute of High Energy Physics)20/08/2026, 16:00MC2.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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Deeksha Sinha (Northern Illinois University)20/08/2026, 16:00MC4.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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Jeongil Heo (Institute for Basic Science)20/08/2026, 16:00MC1.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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Mathieu Omet (High Energy Accelerator Research Organization)20/08/2026, 16:00MC4.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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Woohyeong Kim (Gangneung–Wonju National University)20/08/2026, 16:00MC4.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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Huan Jia (Institute of Modern Physics, Chinese Academy of Sciences)20/08/2026, 16:00MC3.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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Ki Taek Son (Institute for Basic Science)20/08/2026, 16:00MC4.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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Ruiying Luo (Huazhong University of Science and Technology)20/08/2026, 16:001MC2.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)20/08/2026, 16:00MC2.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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Buse Naz Temizel Ozdemir (Northern Illinois University)20/08/2026, 16:00MC1.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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hengjun cao (Institute of High Energy Physics)20/08/2026, 16:00MC4.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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Minseo Jung (Pohang University of Science and Technology)20/08/2026, 16:00MC4.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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Sang-Hee Kim (Pohang Accelerator Laboratory)20/08/2026, 16:00MC2.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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Dr Konstantin Popov (Joint Institute for Nuclear Research)20/08/2026, 16:00MC1.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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Yasuhiro Kondo (Japan Atomic Energy Agency)20/08/2026, 16:00MC3.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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232. Development of high-gradient booster linac for multi-GeV proton radiography at LANSCE (THPO006)Sergey Kurennoy (Los Alamos National Laboratory)20/08/2026, 16:00MC3.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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Bum-Sik Park (Institute for Basic Science), Dr Yeongheum Yeon (Institute for Basic Science)20/08/2026, 16:00MC3.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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Jinyul Hu (Pohang Accelerator Laboratory)20/08/2026, 16:00MC4.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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Dr Sung-Ju Park (Pohang Accelerator Laboratory)20/08/2026, 16:00MC4.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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Chunyi Wu (National Synchrotron Radiation Research Center)20/08/2026, 16:00MC4.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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Mr Ilya Polikarpov (Soreq Nuclear Research Center)20/08/2026, 16:001MC3.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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Davide Lanaia (ALBA Synchrotron (Spain)), Raquel Muñoz Horta (ALBA Synchrotron (Spain))20/08/2026, 16:00MC2.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)20/08/2026, 16:00MC1.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... -
Marten Koopmans (European Spallation Source)20/08/2026, 16:00MC3.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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Peter Gerhard (GSI Helmholtz Centre for Heavy Ion Research)20/08/2026, 16:00MC4.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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Mr Phani Deep Meruga (Instrumentation Technologies (Slovenia), Sapienza University of Rome)20/08/2026, 16:00MC4.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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Dr Hui Liao (China Spallation Neutron Source)20/08/2026, 16:00MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
In high-intensity proton accelerators such as the China Spallation Neutron Source (CSNS), emittance control in the low-energy beam transport (LEBT) section is essential for improving beam quality and achieving high transmission efficiency. The electrostatic beam chopper originally installed in the CSNS LEBT has been shown to increase beam emittance by disrupting space charge compensation...
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Sergey Kutsaev (RadiaBeam Technologies (United States))20/08/2026, 16:00MC2.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)20/08/2026, 16:00MC2.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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Osman Emre Delialioglu (The Graduate University for Advanced Studies, SOKENDAI)20/08/2026, 16:00MC4.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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Dr Anne Oppelt (Deutsches Elektronen-Synchrotron DESY), Christopher Richard (Deutsches Elektronen-Synchrotron DESY)20/08/2026, 16:00MC2.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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mengxue li (Institute of Modern Physics, Chinese Academy of Sciences)20/08/2026, 16:00MC3.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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Ryan Bodenstein (Thomas Jefferson National Accelerator Facility)20/08/2026, 16:00MC1.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)20/08/2026, 16:00MC4.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)20/08/2026, 16:00MC4.A05: Other technologyPoster Presentation
A reliable device interface is essential for long-term accelerator operation. In the RIKEN Radioactive Isotope Beam Factory (RIBF) control system, many devices are integrated with Experimental Physics and Industrial Control System (EPICS) input/output controllers (IOCs) through TCP/IP-based socket communication. Although this approach is flexible and cost-effective, reconnection after an...
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Dr Young-Gi Song (Korea Multi-purpose Accelerator Complex)20/08/2026, 16:00MC4.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,... -
Maleesh Shehan Rathnasiri Dissanayake Mudiyanselage (Lancaster University)20/08/2026, 16:00MC4.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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Mikhail Nozdrin (Joint Institute for Nuclear Research)20/08/2026, 16:00MC1.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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Yiming Xu (Shanghai Synchrotron Radiation Facility)20/08/2026, 16:00MC4.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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Peter Braun (Goethe University Frankfurt)20/08/2026, 16:00MC1.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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David Kleinjan (Los Alamos National Laboratory), Isaac Wiens (Los Alamos National Laboratory)20/08/2026, 16:00MC3.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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Pablo Martinez Reviriego (European Organization for Nuclear Research)20/08/2026, 16:00MC4.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... -
Hao Hu (Huazhong University of Science and Technology)20/08/2026, 16:00MC2.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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Seunghyun Lee (Korea Atomic Energy Research Institute)20/08/2026, 16:00MC3.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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Ivan Rajkovic (SLAC National Accelerator Laboratory)20/08/2026, 16:00MC1.A04 Plasma and wakefield accelerationPoster Presentation
FACET-II is a National User Facility offering unique capabilities for the advancement of accelerator science. Utilizing high-energy electron beams, it enables state-of-the-art research in advanced acceleration methods, ultra-high-brightness beam generation, and novel radiation sources. Here, we provide an overview of the FACET-II facility and highlight its experimental infrastructure, which is...
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Victor Cajus Kröger (Deutsches Elektronen-Synchrotron DESY)20/08/2026, 16:00MC4.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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Eric Viklund (High Energy Accelerator Research Organization)20/08/2026, 16:00MC4.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)20/08/2026, 16:00MC1.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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William Bishop (University of Warwick, Science and Technology Facilities Council)20/08/2026, 16:00MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The target system for a proposed Muon Collider must withstand multi-MW pulsed proton beams, at 5 GeV for 2 MW or 10 GeV for 4 MW scenarios, to produce muons through pion decay. It must also maintain long-term reliability while providing the required particle yield, with performance depending on its ability to sustain high thermal and radiation loads.
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This study presents optimised... -
Yulin Ge (Sun Yat-sen University)20/08/2026, 16:00MC1.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... -
Deepak Raparia (Brookhaven National Laboratory)20/08/2026, 16:00MC1.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... -
Robert Laxdal (TRIUMF)20/08/2026, 16:00MC3.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)20/08/2026, 16:00MC3.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... -
Hayato Ito (High Energy Accelerator Research Organization)20/08/2026, 16:00MC4.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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Buse Naz Temizel Ozdemir (Northern Illinois University)20/08/2026, 16:00MC1.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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Changda Peng (Huazhong University of Science and Technology)20/08/2026, 16:00MC1.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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Mr Geunwoo Kim (Pohang University of Science and Technology)20/08/2026, 16:00MC4.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. Low-power RF tuning is required before high-power conditioning because the input-coupler response and deflecting-mode field distribution...
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Shahnam Gorgi Zadeh (European Organization for Nuclear Research)20/08/2026, 16:00MC4.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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Jindong Liu (Chinese Academy of Sciences)20/08/2026, 16:00MC2.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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Dr Hui Liao (China Spallation Neutron Source)20/08/2026, 16:00MC1.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)20/08/2026, 16:00MC3.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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Zhuang Bi (Kyoto University)20/08/2026, 16:00MC2.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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Pierrick Hamel (CEA, Paris-Saclay University)20/08/2026, 16:00MC3.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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Jie Zeng (Institute of Modern Physics, Chinese Academy of Sciences)20/08/2026, 16:00MC1.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 MengXu Fan (Institute of High Energy Physics, China Spallation Neutron Source)20/08/2026, 16:00MC4.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. Each cavity is equipped with a coaxial fundamental power coupler featuring a characteristic impedance of 50 Ω and a fixed coupling antenna. The coupler must withstand a minimum peak power of 600 kW with 5% duty factor and an equivalent average power of at least 40 kW. This paper...
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Eduardo Moraes Ferrari (Brazilian Center for Research in Energy and Materials)20/08/2026, 16:00MC3.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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Yusuke Takeuchi (Nagoya University)20/08/2026, 16:00MC1.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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Yiheng Ye (SLAC National Accelerator Laboratory)20/08/2026, 16:00MC1.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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Qiao Luo (Huazhong University of Science and Technology)20/08/2026, 16:00MC1.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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