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Jiuqing Wang (Institute of High Energy Physics)01/09/2026, 16:20MC06: Feedback Systems and Beam StabilityPoster Presentation
BEPCII, the upgrade project of the Beijing electron positron collider, is operated not only as a collider for high energy physics research but also as a synchrotron radiation source. Orbit stability is critical for high performance operation. In recent years, an orbit feedback method leveraging neural network was studied and tested on BEPCII, demonstrating improvements in orbit stability....
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Sergey Kuzikov (Thomas Jefferson National Accelerator Facility)01/09/2026, 16:20MC06: Feedback Systems and Beam StabilityPoster Presentation
We propose an AI-driven control architecture that sustains resonance among magnetrons and SRF cavi-ties, enabling efficient accelerator operation. Injection locking will be achieved by extracting pick-up signals from normal-conducting cavities integrated into a beamline with the main SRF cavities. A bunched elec-tron beam behind injector section will excite these resonators to deliver...
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Heather Andrews (Los Alamos National Laboratory)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
For high power ion accelerators such as the machine at the heart of the Los Alamos Neutron Science Center (LANSCE), beam “tails” and “halo” can pose significant problems. Such small fractions of the beam current are easy to lose and difficult to measure, yet can contain enough charge to generate significant radiation; thus, halo and tails can pose a direct threat to instrumentation through...
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Hussein Al-Mohammad (Synchrotron-Light for Experimental Science and Applications in the Middle East)01/09/2026, 16:20MC06: Feedback Systems and Beam StabilityPoster Presentation
Since becoming a user facility in 2017, SESAME has
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employed a Slow Orbit Feedback (SOFB) system, implemented in MATLAB, to stabilize the global orbit of the Storage Ring (SR) at a low correction rate of 0.2 Hz. However, achieving improved synchrotron performance requires sub-micron beam orbit stability across a broader frequency
range, extending up to 100 Hz. To address this, the... -
Laura Torino (ALBA Synchrotron (Spain))01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
The ALBA Synchrotron is preparing its upgrade to ALBA II, requiring reliable diagnostics of longitudinal beam properties. Bunch length measurements are currently performed using a streak camera, providing a precise determination of the bunch profile. In addition, a new method has been implemented to deliver complementary and more readily available measurements during routine operation. The...
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Jangwon Kwon (Institute for Basic Science)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
RAON is a heavy-ion accelerator facility that delivers beams with various energies to experimental areas. To measure bunch lengths shorter than 1 ns, a 50 Ω-matched stripline fast Faraday cup (FFC) was developed. The FFC signal was amplified using a 4 GHz broadband amplifier with a gain of 42 dB and measured with an oscilloscope having a sampling rate of 25 GS/s and a bandwidth of 4 GHz. The...
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Makoto Tobiyama (High Energy Accelerator Research Organization)01/09/2026, 16:20MC06: Feedback Systems and Beam StabilityPoster Presentation
At the SuperKEKB collider, many challenging phenomena arise from the high current and narrow bunch spacing. In particular, there are urgent issues that require clarification and resolution, such as the sudden beam loss (SBL) phenomenon, in which the beam suffers significant loss within the first one or two circuits, and the betatron tune shift along the bunch train due to wake fields. Using...
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Chloe Mertin (Canadian Light Source (Canada))01/09/2026, 16:20MC01: Beam Charge and Current MonitorsPoster Presentation
In 2025, the Canadian Light Source (CLS) began replacing some traditional oscilloscopes with digital oscilloscopes from Pico Technology. These headless oscilloscopes have been exposed via process variables (PVs) in an Experimental Physics and Industrial Control System (EPICS) Input/Output Controller (IOC) application. This allows secondary control, visualization, and analysis software to...
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Atharva Kulkarni (Particle Beam Physics Lab (PBPL))01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
Characterizing bunches non-destructively is extremely useful in a variety of accelerator use cases. In single-event effects testing with pulsed electrons, the bunch charge (~1-10 fC) needs to be measured precisely so that the microelectronic device response can be well correlated with the delivered dose. Cavity-based beam monitors, based on wake field excitation from the beam, offer a highly...
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Muhammad Abdul Rehman (Institute of High Energy Physics)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
For the CSNS-II upgrade, which targets a beam power of 500 kW by increasing the linac output energy from 80 MeV to 300 MeV and the peak current to 50 mA, the Medium Energy Beam Transport (MEBT) line will undergo a major redesign. The new MEBT features an optimized lattice with enhanced collimation to effectively manage the stronger space charge effects at higher beam intensity. Precise bunch...
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Xiaoyu Liu (Institute of High Energy Physics)01/09/2026, 16:20MC06: Feedback Systems and Beam StabilityPoster Presentation
This paper presents a method to improve the shunt impedance of a transverse feedback kicker within a constrained longitudinal space. By modifying the internal geometry of the electrodes to transition from a conventional wideband traveling-wave design to a quasi-resonant configuration, the efficiency of the kicker is enhanced at the expense of operational bandwidth. The proposed design aims to...
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Longwei Lai (Shanghai Advanced Research Institute)01/09/2026, 16:201MC06: Feedback Systems and Beam StabilityPoster Presentation
The Materials Science Synchrotron Light Source is a newly proposed accelerator facility, aimed at providing a powerful platform for materials science research. Two kickers are installed in the booster for tune measurement, while another two kickers in the storage ring serve for transverse feedback and tune measurement. All four kickers adopt a stripline‑type structure. This paper presents the...
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Sankalp Shinde (Friedrich Schiller University Jena)01/09/2026, 16:20MC01: Beam Charge and Current MonitorsPoster Presentation
The Cryogenic Current Comparator (CCC) is a non-interceptive beam diagnostic device for measuring low-intensity ion beams down to the nanoampere range. This work focuses on developing a compact CCC system for CRYRING@ESR at GSI, where installation space inside the ring is limited. A key constraint is integration close to a correction solenoid and dipole magnet, where magnetic perturbations can...
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Si-Won Jang (Pohang Accelerator Laboratory)01/09/2026, 16:20MC01: Beam Charge and Current MonitorsPoster Presentation
Stable top-up operation requires bunch-by-bunch fill-pattern control as well as total beam current regulation. In PLS-II, time-based top-up injection makes it difficult to promptly identify under-filled buckets, over-filled buckets, or abnormal injection shots, which can cause fill-pattern modulation and beamline micro-flux variations.
We developed a bunch-by-bunch current diagnostic IOC...
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liang xu (Institute of High Energy Physics, Chinese Academy of Sciences)01/09/2026, 16:20MC06: Feedback Systems and Beam StabilityPoster Presentation
This paper presents the design of a parameter-tunable turn-by-turn feedback system, integrating front-end analog and digital signal processing modules onto a single functional board. Tailored for storage rings such as BEPCII and HEPS, the system is capable of filtering the revolution frequency and adjusting the feedback phase within 0.5 ms to generate correction signals. Building upon existing...
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Toshinori ABE (Japan Synchrotron Radiation Research Institute)01/09/2026, 16:20MC06: Feedback Systems and Beam StabilityPoster Presentation
Strong suppression of beam instabilities and real-time betatron tune monitoring are crucial for the 4th-generation light source, SPring-8-II. We developed a transverse Bunch-by-Bunch Feedback (TBBF) and a real-time betatron tune monitor based on the AMD RFSoC platform to replace the current legacy systems. Integrating ADCs/DACs, an FPGA, and ARM processors, the RFSoC enables low-latency...
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Thomas Sieber (GSI Helmholtz Centre for Heavy Ion Research)01/09/2026, 16:20MC01: Beam Charge and Current MonitorsPoster Presentation
The Cryogenic Current Comparator (CCC) was proposed and first tested as a low intensity diagnostics in the mid 90s at GSI. After proof of principle, the device was considered having high potential but also high costs and difficult handling. Nonetheless, further research work was done to optimize pickup material and operation stability. With start of the plannings for FAIR, the necessity for a...
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Svenja Kolbe (Ernst Abbe University of Applied Sciences Jena)01/09/2026, 16:20MC01: Beam Charge and Current MonitorsPoster Presentation
Highly sensitive measurement systems based on Cryogenic Current Comparators (CCCs) and SQUID sensors enable the detection of extremely small currents and weak spill signals. However, the beam signal is often superimposed by mechanical and electrical disturbances, such as the 1.4 Hz interference introduced by the helium reliquefier, making reliable signal extraction challenging.
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This work... -
Micha Reissig (Karlsruhe Institute of Technology)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
The Ferninfrarot Linac- und Test-Experiment (FLUTE) is a linac-based accelerator test facility at the Karlsruhe Institute of Technology (KIT). It is designed for electron bunches with energies up to 90 MeV over a wide range of bunch charges, tailored to a variety of accelerator studies. Its bunch compressor enables bunch length adjustments and is designed to compress the bunch length towards...
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Spencer Kelham (Northern Illinois University)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
Electro-optic sampling (EOS) is an attractive technique for non-destructive measurement of electron bunch profiles. Its importance continues to grow for next generation high-energy accelerators, where intercepting diagnostics are no longer viable. In EOS, the measured signal corresponds to the phase retardance, rather than a direct measurement of the electric field. The electro-optic (EO)...
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Jack McGunigal (University of Manchester)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
A non-invasive bunch length monitor based on Cherenkov diffraction radiation (ChDR) was initially designed for 150 MeV, sub-ps bunches and is now also being considered for the AWAKE Run 2c 18 MeV seed electron beam line to measure RMS bunch lengths in the ps range. The monitor consists of dielectric radiators that generate polarization radiation when an electron bunch passes in close proximity...
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Micha Reissig (Karlsruhe Institute of Technology)01/09/2026, 16:20MC01: Beam Charge and Current MonitorsPoster Presentation
The development of minimally invasive beam diagnostics to characterise Ultra-High Dose Rate (UHDR) beams is essential in the increasingly relevant field of FLASH Radiotherapy. In this work we report on the results of irradiation experiments with the BMA580 Micro-Electro-Mechanical Systems (MEMS) accelerometer sensor at the in-air experimental section of the *Ferninfrarot LINAC- und...
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Oliver Grimm (MAX IV Laboratory)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
This contribution describes design and results obtained with newly installed longitudinal diagnostics at the MAX IV linear electron accelerator: a Bunch Compression Monitor (BCM) and an Electro-Optical Arrival Time Monitor (EO-BAM). Both are part of a concerted effort to improve longitudinal stability to a level commensurate with the shortest available bunch lengths of about 3 fs. As MAX IV is...
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Daniele Felici (Paul Scherrer Institute)01/09/2026, 16:20MC01: Beam Charge and Current MonitorsPoster Presentation
The commissioning of the next-generation Swiss Light Source, SLS 2.0, at the Paul Scherrer Institut (PSI) required advanced diagnostic tools*. Built on established Avalanche Photodiode-based (APD) fill pattern monitoring principles used in previous storage ring diagnostic systems, we present an upgraded Filling Pattern Monitor (FPM) designed specifically for real-time evaluation of the SLS...
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Boris Keil (Paul Scherrer Institute)01/09/2026, 16:20MC06: Feedback Systems and Beam StabilityPoster Presentation
The upgraded Swiss Light Source storage ring, SLS 2.0, has employed a newly developed fast orbit feedback (FOFB) system since July 2025. This paper reports on the first year of operational experience and the resulting beam stability. We also detail the FOFB system design — including RF frequency correction and the decoupling of synchrotron oscillation frequencies within the FOFB bandwidth —...
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Alessandro Curcio (Sapienza University of Rome, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati)01/09/2026, 16:20MC01: Beam Charge and Current MonitorsPoster Presentation
Accurate bunch-charge measurement is essential for FLASH and ultra-high-dose-rate (UHDR) electron accelerators, where therapeutic doses exceeding 40Gy/s are delivered in nanosecond-to-microsecond macropulses. We present the calibration and characterization of a non-intercepting charge measurement chain, based on a Bergoz integrating current transformer (ICT) coupled to a Libera ADC-500...
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Hussein Al-Mohammad (Synchrotron-Light for Experimental Science and Applications in the Middle East)01/09/2026, 16:20MC01: Beam Charge and Current MonitorsPoster Presentation
Efficient beam injection from the Booster into the Storage Ring is essential for reducing injection time and extending the life time of Microtron’s cathode and auxiliary gun. A range of beam diagnostic instruments including the Parametric Current Transformer (PCT), Fast Current Transformers (FCTs), and Beam Position Monitors (BPMs) have been employed to characterize and monitor the injection...
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Simon Mattiazzi (Instrumentation Technologies (Slovenia))01/09/2026, 16:20MC01: Beam Charge and Current MonitorsPoster Presentation
In an electron synchrotron, precise charge data in bunch-by-bunch domain allows real-time monitoring of bunch-selective charge operations and fill patterns. For ESRF, a new software release for Libera Digit 500 instrument was developed to provide high quality averaged bunch-by-bunch charge data without the need of very fast ADCs. The working principle is based on locking the ADC sampling rate...
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Brandon Cathey (Oak Ridge National Laboratory)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
The Spallation Neutron Source is developing a particle accelerator digital twin called Virac (Virtual Accelerator) for testing control room applications and training personnel and machine-learning models. Currently, Virac consists of PyORBIT, a Particle-in-Cell accelerator model, with model parameters read from and written to an EPICS server. As part of being a true digital twin, Virac maps...
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Sinchul Kang (Institute for Basic Science)01/09/2026, 16:20MC01: Beam Charge and Current MonitorsPoster Presentation
Rare Isotope Accelerator complex for On-line experiments (RAON) is a heavy-ion accelerator facility designed to provide stable and rare isotope beams in Korea. Nuclear Data Production System (NDPS) is one of the experimental systems at RAON and provides neutron beams for nuclear data measurements and other applications. At NDPS, an Ar-40 ion beam with an energy of about 18 MeV/u is delivered...
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Ryan Allinson (ISIS Neutron and Muon Source)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
The ISIS Neutron and Muon Source is a particle accelerator located at the Rutherford Appleton Laboratory in the UK. Protons are energised to 70MeV through the linear accelerator, before accelerating in the synchrotron to 800MeV; with the facility providing beam at a rep rate of 50 Hz. At this energy, protons are delivered to two target stations to produce neutrons and muons (TS1 at 40 Hz and...
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Jiri Kral (Deutsches Elektronen-Synchrotron DESY)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
Electro-optical bunch arrival time monitor design at DESY has undergone a wide R&D effort, in order to improve its resolution below 1 fs level. The electronics of the BAM system is responsible for capturing and digitizing the optical pulses that result from laser modulation with the RF signal generated by the passing beam. Development and performance of the new electronics for BAM is presented...
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Daiki Nagao (High Energy Accelerator Research Organization)01/09/2026, 16:20MC06: Feedback Systems and Beam StabilityPoster Presentation
The J-PARC Main Ring (MR) is being upgraded toward a beam power of 1.3 MW. As the beam intensity increases, higher-frequency intrabunch oscillations are expected to become more pronounced. To suppress these oscillations, the intrabunch feedback (IBFB) system is being upgraded.
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The current IBFB system operates at a sampling rate of approximately 110$~$MS/s synchronized with the circulating... -
Xiaodong Yang (Institute of Modern Physics, Chinese Academy of Sciences)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
In the cooling storage ring, a low-temperature electron beam from the electron cooling device overlaps with a high-temperature ion beam over a finite interaction length at matched average velocities. Through Coulomb interactions, electrons absorb excess thermal energy from the ions, thereby reducing the transverse emittance and longitudinal momentum spread of the ion beam and increasing its...
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Carlos Sarabia-Cardenas (Facility for Rare Isotope Beams)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
A magnetic quadrupole pick-up structure has been assessed for creation and future use at The Facility for Rare Isotope Beams (FRIB) at Michigan State University (MSU). This device has been optimized for use in the FRIB beamline. Following the optimizations came changes due to manufacturing constraints. Due to the constraints, three smaller, but still suitable, pick-ups will be used instead....
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Bernhard Scheible (Technische Hochschule Mittelhessen)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
A novel planar pickup structure on a printed circuit board (PCB) with an integrated combination network has been developed for the electro-optical bunch arrival-time monitors (EO-BAMs) used at the European XFEL and other free-electron laser (FEL) facilities. The design aims for single-digit fs resolution during 1 pC operation in FEL and ultrafast electron diffraction facilities, as well as an...
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MingDong Ma (University of Science and Technology of China)01/09/2026, 16:201MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
Conventional TCSPC bunch-length measurements are degraded by low-frequency longitudinal phase drift. A previously proposed dynamic compensation method based on BPM zero crossing extraction was validated in single bunch mode, but multi bunch operation introduces additional challenges: system delay misassignment and baseline superposition in BPM waveforms. This paper extends the method to the...
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James FitzGibbon (Science and Technology Facilities Council)01/09/2026, 16:20MC01: Beam Charge and Current MonitorsPoster Presentation
The ISIS Neutron and Muon Source at the Rutherford Appleton Laboratory (UK), operated by STFC, is a pulsed neutron spallation facility that employs a rapid cycling synchrotron to accelerate protons to 800 MeV before delivering them to two fixed targets at a combined repetition rate of 50 Hz. As part of an ongoing upgrade programme, a Medium Energy Beam Transport (MEBT) line is being installed...
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Yun Liu (Oak Ridge National Laboratory)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
We experimentally investigated turn-resolved longitu-dinal bunch dynamics in the Spallation Neutron Source (SNS) linac using laser-wire diagnostics. The measure-ments revealed distinct turn-to-turn variations in both the rms bunch width and bunch-center delay. These re-sults demonstrate a novel capability of laser-wire diag-nostics to resolve the longitudinal properties of the oper-ational...
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Bernhard Scheible (Technische Hochschule Mittelhessen)01/09/2026, 16:20MC05: Longitudinal Diagnostics and SynchronizationPoster Presentation
Free‑electron lasers rely on extremely high‑quality, ultrafast electron bunches. Among various diagnostic tools, THz detectors play an essential role in longitudinal diagnostics of electron bunches, such as during the bunch compression process. To address both the existing and future machines, we are developing ultra-broadband THz detectors. Here, we present the development of Schottky diodes...
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