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Yu Du (Institute of Modern Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences)18/08/2026, 16:001MC1.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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Xiaoyu Huang (Advanced Energy Science and Technology Guangdong Laboratory)18/08/2026, 16:00MC4.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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Paula Desiré (European Organization for Nuclear Research, University of Groningen)18/08/2026, 16:00MC1.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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Ouzheng Xiao (Institute of High Energy Physics, National Synchrotron Radiation Laboratory)18/08/2026, 16:00MC4.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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Ruiying Luo (Huazhong University of Science and Technology)18/08/2026, 16:00MC2.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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Mikhail Vladimirov (National Research Nuclear University MEPhI)18/08/2026, 16:00MC2.A02: Electron linac projectsPoster Presentation
The fourth generation synchrotron radiation facility SYLA (Synchrotron&Linac) is now under development. 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 for an accelerating cell...
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Hao Hu (Huazhong University of Science and Technology)18/08/2026, 16:00MC2.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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Jiapeng Li (Huazhong University of Science and Technology)18/08/2026, 16:00MC1.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)18/08/2026, 16:00MC4.A07: Room temperature RFPoster Presentation
RF-conditioning is an essential pre-processing step of normal conducting cavities. This time-intensive work can pose great risks to the 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.... -
369. Bayesian Optimization for Constrained Beam Transport Line Design in the RAON Injector (TUPO003)Chanmi Kim (Institute for Basic Science)18/08/2026, 16:00MC1.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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Mariya Arsentyeva (Budker Institute of Nuclear Physics, Synchrotron Radiation Facility — Siberian Circular Photon Source «SKIF» Boreskov Institute of Catalysis, Novosibirsk State University)18/08/2026, 16:00MC1.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 Prach Boonpornprasert (Synchrotron Light Research Institute), Dr Thakonwat Chanwattana (Synchrotron Light Research Institute)18/08/2026, 16:00MC1.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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Yuxuan Yang (China Spallation Neutron Source)18/08/2026, 16:00MC1.A01: Beam Dynamics, beam simulations, beam transportPoster Presentation
The RF-focused interdigital (RFI) linac combines longitu-
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dinal acceleration and transverse RF quadrupole focusing in
a compact IH-type cavity without embedded magnets. In a
multicell RFI cavity, fringe fields and phase dependent focus-
ing make simplified beam dynamics models difficult to map
reliably onto the final three-dimensional geometry. A staged
electromagnetic beam dynamics... -
Jun Peng (Institute of High Energy Physics, Chinese Academy of Sciences, Spallation Neutron Source Science Center)18/08/2026, 16:00MC1.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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Dr Marion White (Argonne National Laboratory)18/08/2026, 16:00MC2.A04: FELsPoster Presentation
Cavity-based free-electron lasers (CBXFELs) have the potential to dramatically improve the stability and coherence of FELs. The CBXFEL project is an Argonne, SLAC, RIKEN collaboration to build a 65-m-long rectangular X-ray cavity at the LCLS, to demonstrate low-loss cavity ringdown and two-pass FEL gain. Argonne was responsible for design and construction of the X-ray cavity and SLAC was...
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Jiyoung Choi (Pohang University of Science and Technology)18/08/2026, 16:00MC4.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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Junyeong Jeong (Ulsan National Institute of Science and Technology)18/08/2026, 16:00MC1.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)18/08/2026, 16:00MC4.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)18/08/2026, 16:00MC4.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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Wei Li (Institute of High Energy Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences)18/08/2026, 16:00MC1.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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Dr Jibran Latif (Spallation Neutron Source Science Center, Institute of High Energy Physics, Chinese Academy of Sciences)18/08/2026, 16:00MC2.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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Mikhail Gorbunov (National Research Nuclear University MEPhI)18/08/2026, 16:00MC2.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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Dr Donghyun Kwak (Korea Atomic Energy Research Institute)18/08/2026, 16:00MC4.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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432. Design and simulation of a compact microtron for THz free-electron laser applications (TUPO082)geonwook park (Korea University of Science and Technology)18/08/2026, 16:00MC2.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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Namseok Go (Pohang Accelerator Laboratory)18/08/2026, 16:00MC1.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... -
Noman Habib (Institute of High Energy Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences)18/08/2026, 16:00MC2.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 115.1 kV, the designed electron gun produces a total space-charge-limited beam current of 134.8 A while maintaining an average cathode loading below 3.36 A/cm²,...
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Fu Ma (Institute of Modern Physics, Chinese Academy of Sciences)18/08/2026, 16:00MC3.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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Abhishek Pathak (Fermi National Accelerator Laboratory)18/08/2026, 16:00MC1.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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Ahong Li (Institute of High Energy Physics, Spallation Neutron Source Science Center)18/08/2026, 16:00MC2.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)18/08/2026, 16:00MC1.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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Kenta Futatsukawa (High Energy Accelerator Research Organization)18/08/2026, 16:00MC4.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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Alexander Plastun (Facility for Rare Isotope Beams)18/08/2026, 16:00MC4.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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Mathieu Omet (High Energy Accelerator Research Organization), Dr Rishabh Bajpai (High Energy Accelerator Research Organization)18/08/2026, 16:00MC4.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... -
211. Development of high power energy recovery absorbing load for large scale accelerators (TUPO033)yang zhao (Institute of High Energy Physics, Chinese Academy of Sciences)18/08/2026, 16:00MC2.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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Fu Ma (Institute of Modern Physics), Xuejun Yin (Institute of Modern Physics), Zhongshan Li (Institute of Modern Physics)18/08/2026, 16:00MC3.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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Holger Podlech (Goethe University Frankfurt, HFHF - Helmholtz Research Academy Hesse for FAIR, Campus Frankfurt)18/08/2026, 16:00MC3.A05: RFQsPoster Presentation
A dedicated heavy-ion Radio Frequency Quadrupole (RFQ) accelerator is currently under development at GSI Darmstadt and IAP Frankfurt for the SIBAF (Superconducting Ion accelerator as BAsis technology for Fusion research) project. From an injection energy of 4 keV/u to a final energy of 300 keV/u, the SIBAF RFQ is designed to accelerate heavy ions with a mass-to-charge ratio of up to 8.5 at...
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Buse Naz Temizel Ozdemir (Northern Illinois University)18/08/2026, 16:00MC1.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)18/08/2026, 16:00MC4.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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Hooman Hassanzadegan (European Spallation Source)18/08/2026, 16:00MC4.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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Deeksha Sinha (Northern Illinois University)18/08/2026, 16:00MC1.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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DAON LEE (Kangwon National University)18/08/2026, 16:00MC4.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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Xingguang Liu (Chinese Academy of Sciences)18/08/2026, 16:00MC2.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)18/08/2026, 16:00MC3.A04: Proton linac projectsPoster Presentation
The CSNS linac delivers a primary H- beam to the rapid cycling synchrotron (RCS), while stripped proton beams are also produced during beam transport. Protons generated naturally by residual-gas stripping are extracted to the Associated Proton beam Experiment Platform (APEP) and used for low-intensity irradiation of devices and materials. Controlled carbon-foil stripping in the LRBT removes...
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Yu Zhao (Institute of High Energy Physics, Chinese Academy of Sciences, Spallation Neutron Source Science Center)18/08/2026, 16:00MC2.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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Geonyeong Mun (Pohang Accelerator Laboratory)18/08/2026, 16:00MC4.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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Borut Baricevic (Instrumentation Technologies (Slovenia))18/08/2026, 16:00MC4.A04: Low level RFPoster Presentation
LLRF control of accelerating cavities with microsecond-scale pulses is challenging because short pulses limit the effectiveness of FPGA-based intra-pulse feedback, restricting control to pulse-to-pulse corrections. This is often insufficient to compensate RF-chain-induced jitter and achieve the required field stability. We propose a novel intra-pulse feedback scheme for short pulses, featuring...
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Paula Desiré (European Organization for Nuclear Research, University of Groningen)18/08/2026, 16:00MC2.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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Mr Yutaro Kubo (Kyoto University)18/08/2026, 16:001MC1.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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Mikhail Nozdrin (Joint Institute for Nuclear Research)18/08/2026, 16:00MC2.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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Ji-Ho Jang (Institute for Basic Science)18/08/2026, 16:00MC1.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)18/08/2026, 16:00MC3.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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Dr Konstantin Popov (Joint Institute for Nuclear Research, Institute of Nuclear Physics)18/08/2026, 16:00MC4.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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Won Jang (Pohang University of Science and Technology)18/08/2026, 16:001MC1.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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Andrea Passarelli (European Spallation Source)18/08/2026, 16:00MC3.A04: Proton linac projectsPoster Presentation
Following the Beam on Dump (BOD) and BOD2 campaigns, the European Spallation Source (ESS) is preparing for the subsequent BOD3 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...
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Ahong Li (Institute of High Energy Physics, Spallation Neutron Source Science Center)18/08/2026, 16:00MC3.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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Vyacheslav Yakovlev (Fermi National Accelerator Laboratory)18/08/2026, 16:00MC4.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 instabilities appearing in the beam. We discussed the practical limitations imposed by HOMs for large accelerator projects, such as the Large...
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Dong-O Jeon (Institute for Basic Science)18/08/2026, 16:00MC1.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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Gyuhaeng Jo (Korea Multi-purpose Accelerator Complex)18/08/2026, 16:00MC4.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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Motoki Sato (High Energy Accelerator Research Organization)18/08/2026, 16:001MC2.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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Fu Ma (Institute of Modern Physics, Chinese Academy of Sciences), Prof. Xiaodong Yang (Institute of Modern Physics, Chinese Academy of Sciences)18/08/2026, 16:00MC2.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)18/08/2026, 16:00MC1.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,... -
Andrea Passarelli (European Spallation Source)18/08/2026, 16:00MC4.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... -
Junwon Choi (Kangwon National University)18/08/2026, 16:00MC4.A05: Other technologyPoster Presentation
A permanent magnet quadrupole (PMQ) that generates its magnetic field without an external power supply and allows the gradient to be varied mechanically was designed. The two-dimensional pole shape was obtained using Non-dominated Sorting Genetic Algorithm II (NSGA-II) with objective functions of $1/|B_2|$ and $|B_6/B_2|$, and an end-edge chamfer angle was selected to minimize the integrated...
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Yue Yuan (Institute of High Energy Physics, Chinese Academy of Sciences, Spallation Neutron Source Science Center)18/08/2026, 16:00MC3.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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Han Xiao (Institute of High Energy Physics)18/08/2026, 16:00MC4.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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Brahim Mustapha (Argonne National Laboratory)18/08/2026, 16:00MC3.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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Zachary Liptak (Hiroshima University)18/08/2026, 16:00MC1.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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Lars Groening (GSI Helmholtz Centre for Heavy Ion Research)18/08/2026, 16:00MC4.A07: Room temperature RFPoster Presentation
Radio-frequency cavity field mapping is conventionally performed by pulling a perturbing bead through the cavity on a dielectric wire. Although well established, this procedure requires cavity-specific mechanics and can introduce perturbations, vibration, and alignment errors. We demonstrate a compact wire-free alternative in which repeatable liquid drops fall through the cavity under gravity....
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Michael Mayerhofer (Universität der Bundeswehr München)18/08/2026, 16:00MC4.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)18/08/2026, 16:00MC1.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)18/08/2026, 16:00MC1.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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Liang Lu (Sun Yat-sen University)18/08/2026, 16:001MC1.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)18/08/2026, 16:00MC1.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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Bum-Sik Park (Institute for Basic Science)18/08/2026, 16:00MC3.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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Yuga Nakazawa (High Energy Accelerator Research Organization)18/08/2026, 16:00MC4.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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Wei Qin (Institute of Modern Physics, Chinese Academy of Sciences)18/08/2026, 16:00MC3.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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Yaodan Hu (Huazhong University of Science and Technology)18/08/2026, 16:00MC4.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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Dr Hendrik Hähnel (Goethe University Frankfurt, HFHF - Helmholtz Research Academy Hesse for FAIR, Campus Frankfurt)18/08/2026, 16:00MC1.A03 Other beamsPoster Presentation
The Frankfurt Neutron Source FRANZ is a compact-accelerator driven neutron source based on the $^7Li(p,n)^7Be$ reaction using a 2 MeV proton beam. Following successful stand-alone RF conditioning of the IH-DTL up to 10 kW cw, the coupled RFQ-IH-DTL cavity was assembled, tuned and conditioned up to 200 kW. First beam experiments have been performed, demonstrating proton acceleration to 2 MeV....
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Maximilian Schuett (GSI Helmholtz Centre for Heavy Ion Research)18/08/2026, 16:00MC3.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)18/08/2026, 16:00MC3.A05: RFQsPoster Presentation
The Institute for Applied Physics (IAP) at Goethe University Frankfurt has a long experience in the development of 4-rod RFQs. Within the LOEWE funding programme, funded by the Hessen Agentur under funding line 3, the conventional 4-rod RFQ design has been further developed. By implementing a series of improvements to the RF design and introducing metallic sealing technology, a demonstrator...
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Mathieu Omet (High Energy Accelerator Research Organization)18/08/2026, 16:00MC4.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)18/08/2026, 16:00MC4.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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Viatcheslav Grishin (European Spallation Source)18/08/2026, 16:001MC4.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.... -
379. Study of beam mismatch effects in a 2.5-MeV 200-MHz 4-Vane RFQ for neutron generation (TUPO071)Masahiro Okamura (Brookhaven National Laboratory)18/08/2026, 16:00MC3.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... -
Weihang Liu (Institute of High Energy Physics)18/08/2026, 16:00MC1.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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Konstantin Popov (Institute of Nuclear Physics)18/08/2026, 16:00MC3.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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Cong Zhang (Institute of High Energy Physics)18/08/2026, 16:00MC4.A08: Superconducting RFPoster Presentation
In this paper, the design of a ferroelectric fast reactive tuner for superconducting cavities has been presented.
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Prof. Holger Podlech (Goethe University Frankfurt, HFHF - Helmholtz Research Academy Hesse for FAIR, Campus Frankfurt)18/08/2026, 16:00MC3.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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Jonathan Dumas (Commissariat à l'Energie Atomique)18/08/2026, 16:00MC3.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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Yanliang Han (Institute of High Energy Physics)18/08/2026, 16:00MC1.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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