Characterization and optimization of the transverse phase space is crucial for the performance of photoinjectors. To this end, many measurements of the transverse phase spaces are taken. Often, the x and y 2D phase spaces are measured separately because they are assumed to be primarily uncoupled. However, there will be some 4D coupling due to solenoid fields, asymmetries in the beamline, or...
This paper presents the enhancement of photon beam position stability at the Siam Photon Source (SPS) synchrotron through a real-time feedback control system incorporating a fault-tolerant control (FTC) algorithm. The system utilizes Photon Beam Position Monitor (pBPM) measurements within a global orbit feedback loop to minimize beam position fluctuations. The FTC algorithm plays a critical...
The Synchrotron Light Research Institute (SLRI) in Thailand aims to operate a 6-MeV electron linear accelerator for irradiation, supporting various agricultural and industrial applications. This study presents a method for measuring electron beam energy using the existing dipole magnet in the beamline, originally designed for scanning X-rays on samples through a scan horn. An aluminum sheet...
Sudden beam loss (SBL) is one of the obstacles to improving the luminosity of SuperKEKB. SBL cause damage to collimators and other accelerator components, QCS quench, and large background to the Belle II detector. It also causes beam abort and prevents the accumulation of high currents. Therefore, it is an important issue to investigate and resolve the causes of SBL events. In order to...
The Korea-4GSR (4th Generation Synchrotron Radiation Source) is under construction since 2021 to be a state-of-the-art research facility requiring exceptional stability for its electron beam to ensure high-quality experimental data. Ground vibrations originating from both natural and artificial sources can significantly impact the stability of critical components, particularly the accelerator...
Optical Cherenkov Radiation (ChR) is a well-known type of radiation, which is utilized in different fields of physics such as charged particle detection or generation of intense THz radiation. It is also widely used in beam diagnostics, for instance, in beam loss monitors or for bunch length measurements. In addition, it is of potential interest for transverse beam profile diagnostics as an...
China Spallation Neutron Source (CSNS) accelerator complex will employ a new superconducting accelerating section to achieve high beam power. To protect the superconducting cavity from contamination, the second phase of the CSNS superconducting linac section will adopt laser stripping technology for transverse distribution measurements of the negative hydrogen beam at nine stations. In 2024, a...
The Super Tau-Charm Facility (STCF) is a next-generation electron-positron collider designed to explore tau-charm physics within a center-of-mass energy range of 1 to 3.5 GeV. To achieve a peak luminosity exceeding 5 × 10^34 cm^-2s^-1, STCF adopts advanced beam dynamics techniques, including large Piwinski angle collisions to mitigate the hourglass effect and crab waist correction to...
At the Center for Nuclear Study, The University of Tokyo, the experiments to measure the Electric Dipole Moment (EDM) of Francium is in progress. Francium is produced via a nuclear fusion reaction by bombarding a gold target with an oxygen-18 ion beam, requiring a beam intensity of 18 eμA or higher. However, the current beamline's transport efficiency decreases to approximately 66 % when the...
At Diamond, it was previously observed that the response of the beam changes with mode number when excited by the transverse multi-bunch feedback (TMBF). This study presents the results of various experimental campaigns carried out to investigate the behaviour of tune-sweep waveforms for a variety of stored beam conditions and TMBF settings. We demonstrate that it is unlikely that wakefields...
This study presents the design, specifications, and experimental validation of the Allison scanner installed at the injector of the 100 MeV proton accelerator operated by the Korea Multi-purpose Accelerator Complex (KOMAC). The Allison scanner was developed to enable precise characterization of the proton beam’s phase space at the injector stage. Detailed design parameters and operational...
During the pre-research phase of China Spallation Neutron Source (CSNS) upgrade project (CSNS-II), in order to conduct beam commissioning of the Radio Frequency Quadrupole (RFQ) under high-intensity beam conditions, The structure of the last-stage wire scanner of the Medium Energy Beam Transport (MEBT) was innovatively modified. This modification not only added a Beam Stop but also...
Diamond-II will require two types of stripline kickers during normal operation: the kicker actuators for the transverse multibunch feedback system; and the injection stripline kickers which enable transparent injection. Both are very similar in design as they need to kick individual bunches without disturbing the following bunches. The main difference is the voltage requirements. The feedback...
The design of low-level feedback (LLRF) controllers used to stabilize amplitude and phase of the field inside the RF cavities are customized in nature depending upon the frequency and mode of operation. IUAC, India, operates accelerators with RF structures in the range from 12.125-97 MHz in normal and superconducting mode. Currently, all the LLRF controllers operational for many years, are...
The CSNS RCS (Rapid Cycling Synchrotron) is a proton accelerator designed to achieve a target beam energy of 1.6 GeV, with a typical operating intensity of 140 kW, which is expected to increase to 500 kW after the CSNS II upgrade. However, a significant current instability has been observed during the 100 kW beam operation. To mitigate this instability, techniques such as operational tuning...
After the success of 80 MeV negative hydrogen beam profile measurement based on laser wire monitor, in order to further realize the beam emissivity measurement, an emissivity measurement system combining the laser wire monitor and LGAD (low-Gain Avalanche Diode) sensor has been designed. The idea is to use the LGAD sensor to detect and reconstruct the H0 distribution, combined with the...
As part of the new Proton Improvement Plan (PIP-II), Fermilab is undertaking the development of a new 800 MeV, 2 mA H- superconducting RF linac to replace its present normal conducting 400 MeV linac. The PIP-II linac consists of a series of superconducting RF cryomodules from 2.1 MeV to 800 MeV. To limit the potential damage to the superconducting RF cavities, PIP-II will utilize non-invasive...
Linear wire scanners are an essential instrument for beam profile measurements in the CERN accelerator complex. However, in the Large Hadron Collider, an aging design has led to performance issues in recent years. This study presents a next-generation wire scanner design that enhances reliability and measurement accuracy through advancements in motion technology. A key innovation is replacing...
Transverse beam-profile monitoring is crucial for the safe and efficient operation of particle accelerators. In high-radiation zones near fixed targets and beam dumps, imaging sensors—especially cameras used for beam-profile measurements—degrade rapidly, compromising beam diagnostics.
In this study, we propose using a single multimode fiber (MMF) to relay optical signals from an...
This work presents the development and experimental validation of a control system for synchrotron X-ray beam stabilization. A laboratory-scale replica of a beamline was constructed using an analog oscilloscope to emulate beam dynamics. Electrical actuation was implemented via deflection plates, while disturbances were introduced using an electromagnet. Beam position monitoring was performed...
In order to test the Standard Model through a precision measurement of the muon anomalous magnetic moment, a 212 MeV muon accelerator is being developed and constructed for the J-PARC muon g−2/EDM experiment. During the early stage of commissioning, the number of muons per pulse could be fewer than 100, necessitating a highly sensitive monitor. In addition, muon identification must be...
We have developed a highly sensitive beam profile monitor, the High-Gain Residual Gas Ionization Profile Monitor (HGRGIPM). The HGRGIPM detects electrons ionized by the proton beam in residual gas, which are guided by electric fields to a phosphor screen. The fluorescence is collected by an optical system. RGIPMs have proven to be powerful diagnostic tools for high-intensity beams because they...
The increasing demands for high-resolution beam diagnostics necessitate advanced simulation tools capable of modeling complex wave-optics phenomena. We present an optical simulation toolkit based on the angular spectrum propagation method, validated through comparisons with SRW. For synchrotron radiation interferometer simulations, the toolkit demonstrates excellent agreement with SRW results,...
Materials with a minimal interaction with particle beams are widely used in accelerators in interceptive instruments such as screens, secondary emission grids and wire scanners. Material damage limits are already exceeded in energy frontier and high brightness machines.
A new generation of ‘low density’ materials with nano-structures are becoming available at scales of interest for use in...
Accurate measurement of photon beam position and profile is crucial for beamline users to achieve precise alignment and efficient utilization of the desired photon beam. In low-emittance storage rings, however, the power density of the photon beam has increased, making it challenging for conventional profile monitors such as wire scanners and scintillating screens to withstand the high power...
Wire Scanner profile Monitor (WSM) has been developed for the demonstration ring of Fixed Field Alternating gradient (FFA) accelerator, called FETS-FFA. From previous studies, Carbon Nano Tube (CNT) wire is selected for the FETS-FFA WSM, durable for the heat damage of low energy proton beams on FETS-FFA test ring (3-12 MeV). The bias voltages are required to prevent secondary electrons...
In order to improve our transverse diagnostic tools, two new pinhole
beamlines will be designed. The pinhole arrays will be in air for easier
maintenance: this will result in a significant loss of X-Ray photons
when passing through the vacuum window. To overcome this issue, the
option to directly illuminate a CCD/CMOS camera with X-Ray radiation
without prior conversion into visible...
Understanding the transverse emittance of the beam emerging from the RFQ is an important step in commissioning the Front End Test Stand (FETS) accelerator and ensuring proper matching into the downstream transport line. In this work, we present transverse emittance measurements taken at the output of the 3 MeV RFQ using the quadrupole scan method. To complement the RMS analysis, a tomographic...
We propose an innovative method for measuring beam profiles at the Iranian Light Source Facility (ILSF) Synchrotron, which produces 3 GeV electron bunches. In this new generation of synchrotrons, short bunches require more precise detection techniques. The X-rays generated by dipole sources provide sufficient resolution for accurate diagnostics of the beam profile. This study explores the...
To enhance the performance of next-generation X-ray Free Electron Lasers (XFELs), it is crucial to produce high-quality electron beams with low emittance, particularly for attaining emittances below 0.2 mm.mrad for 100 pC bunch charges. This study introduces an emittance measurement method using an orthogonal dual-slit technique, aimed at enhancing measurement efficiency and achieving the...
The objective of this work is to assess the accuracy of measurements made by the Electron Beam Profile Scanner (EBPS), which captures the trajectory of an electron beam with and without a proton beam present. The proton beam induces deflection in the electron beam, which is influenced by proton charges.
For high-resolution images, the probe beam needs to be of high intensity, small diameter,...
In radiotherapy, treatment beams warrant fine margins due to the goal of sparing the patient’s healthy tissue. Studies have found that to counteract Bragg peak range deviations, safety margins of approximately less than 5% around the target volume are normally used in clinical settings. Hence, diagnostics would be improved if they cause as close to zero beam perturbation as possible. A...
We recently introduced a novel interferometric method inspired by radio astronomy, utilizing a Non-Redundant Aperture (NRA) mask with self-calibration to fully characterize the two dimensional transverse shape of electron beams from a single-shot interferogram.
This paper reports the latest advancements in this technique, including a new data analysis approach based on closure amplitudes,...
The Diamond-II upgrade will enhance the performance of the Diamond Light Source synchrotron, including improved beam stability by the Fast Orbit Feedback system. Achieving the targeted closed-loop bandwidth of 1 kHz necessitates an open-loop actuator bandwidth of approximately 10 kHz, which presents significant design challenges for the corrector magnet vacuum vessel. Additionally, subsystems...
Orbit feedback system of the Taiwan Photon Source (TPS) had been deployed one decade ago and upgraded from 10 kHz to 30 kHz in 2020. To further improve orbit feedback performance, the FOFB system is proposed to upgraded to 48 kHz. The integration of BPM, power supply control and fast orbit feedback will be summarized in this report.
The Low Energy RHIC Electron Cooler (LEReC), the world’s first RF-based non-magnetized electron cooler successfully provided cooling of gold ions at γ-factors 4.1 and 4.9 during RHIC Runs 2019-2021, substantially increasing RHIC luminosity. Since then, LEReC has been routinely used for numerous cooling studies. Development of trajectory and energy feedbacks for electron beam was an important...
A Gas Sheet Beam Profile Monitor (GSBPM) was designed and developed for the Integrable Optics Test Accelerator (IOTA) at Fermilab. IOTA will receive 2.5 MeV protons, with an average beam current of 8 mA. Before implementation at IOTA, the GSBPM performance was tested at the Crocker Nuclear Laboratory cyclotron at UC Davis, CA. The cyclotron proton energy produces at the range from 60-5.45 MeV...
In proton FLASH therapy the beam monitoring is crucial to ensure the conformal dose deposition to the tumour and effective Organ at Risk (OAR) sparing. A non- invasive real time beam monitoring improves the efficacy as the dose is delivered in shorter time scales. To achieve this, gas-jet based Ionization Profile Monitor (IPM) is developed with potential capability towards real time beam...
Transverse beam profile diagnostics constitute a critical component in free-electron laser (FEL) operation and optimization. As a standard diagnostic tool, optical transition radiation (OTR) has been widely adopted in FEL facilities. However, as the bunch longitudinal length below 500 fs, the OTR method becomes significantly affected by coherent effects. This paper presents a systematic...
The SOLARIS synchrotron light source has commissioned a transverse bunch-by-bunch feedback system designed to suppress coupled-bunch instabilities and serve as a diagnostic tool for accelerator studies. The system was successfully installed and integrated with the existing infrastructure, including timing and control systems. After a series of commissioning steps, it was brought into operation...
A new orbit feedback system has been introduced to the PF-ring, a synchrotron radiation source at KEK, starting from the third operation period of FY2024. The new system is built with state-of-the-art digital signal processing circuits based on the MicroTCA.4 standard. The stored beam’s closed orbit distortion (COD) is measured at a 10 kHz rate using the circuits matched to the number of BPMs,...
As one of the most valuable noninvasive profile monitors in proton and heavy ion facilities， 6 Ionization Profile Monitors (IPM) have been installed in two synchrotrons of High Intensity heavy ion Accelerator Facility (HIAF). Among them, 5 IPMs are equipped with the Micro Channel Plates (MCPs) 、Phosphor screen (P46) and camera acquisition. The goal is to obtain the large envelop with good...
Beam imaging systems are integral parts of beam instru-
mentation at CERN, measuring the shape, size, and position
of particle beams in accelerators. Following the worldwide
phasing out of analog cameras and vidicon tubes (which the
system was initially based on and still partially uses), part
of the ongoing consolidation program involves developing a
new camera system based on digital...
A laser wire monitor has bean developed at the China Spallation Neutron Source (CSNS).The monitor utilizes a 1064 nm laser source to measure the horizontal and vertical profiles of a negative hydrogen ion (H-) beam with an energy of 80 MeV in the injection zone. This paper describes the design of the laser optical path layout and the characterization of the transport performance. The...
A low energy experimental bench called LEEx-B is being developed at IPHC-CNRS of Strasbourg, France. The bench is composed of a CS+ ion gun mounted on a HV platform and beams up to 25 keV are provided. The main objective of this bench is to support the advancement of beam diagnostics, including the ongoing development of the Allison-type emittance-meter. This paper presents the progress of the...
Beam Halo Monitoring (BHM) is essential for high-intensity accelerators like the HL-LHC. Carbon Nanotube (CNT) wires offer a promising alternative to traditional carbon fibre scanners due to their lower density, improved thermal properties, and reduced beam interaction. This work evaluates the performance of CNT wires in beam halo diagnostics, focusing on their energy and intensity range,...
The measurement of transverse profiles of the electron beam is key to measuring and optimizing the emittance of a linear accelerator. Also, transverse profile monitors are used in conjunction with an RF deflecting structure to measure bunch length and slice emittance. An RF deflector and a profile monitor behind the undulator can furthermore be used to reconstruct the FEL pulse profile. I will...
The Alternating Gradient Synchrotron (AGS) at Brookhaven National Lab is equipped with two types of Ionization Profile Monitors (IPMs): ion-collecting and electron-collecting. Ion-collecting IPMs are susceptible to significant distortions in the measured beam size due to the space charge of the passing beam. Conversely, electron-collecting IPMs are much less affected but can only be operated...
A model-based optimal control approach has been developed for the slow orbit feedback (SOFB) system to enhance orbit stability in the Siam Photon Source (SPS) storage ring. The control strategy utilizes a linear quadratic regulator (LQR) based on a multi-input, multi-output (MIMO) state-space model of the linear SPS storage ring, derived through system identification using MATLAB and SIMULINK....
Transverse beam diagnostics with standard imaging techniques represent a challenge for next-generation accelerators and colliders due to the extremely small beam sizes, and X-ray interferometry offers an interesting method to overcome this challenge. In this regard, the X-ray Heterodyne Near Field Speckles (X-HNFS) technique has successfully been used to resolve few-micrometer beam sizes and...
An ECR microwave H+ source has been built at the HUN-REN EK-CER that targets medium current (20mA) and 35 keV beam energy in continuous or pulsed mode (0.1-10ms @ 0.01-25Hz) and low normalized beam emittance (< 1 π mm.mrad).
A new gas jet-based diagnostic system installed on the proton source provides non-invasive beam profile measurement * and allows a novel way for emittance evaluation with...
As part of our search for radiation-hard techniques for beam profile monitoring, we have conducted a novel experiment using microstructured optical fibres, which are known for their extremely high radiation tolerance, filled with scintillation gases, which are also inherently radiation hard. We tested this new technique at the CLEAR accelerator at CERN, demonstrating its potential for beam...
Optical Transition Radiation (OTR) is a widely used diagnostic technique in accelerator particle beam applications, providing high-resolution beam profile measurements. This work focuses on the development and implementation of OTR-based beam profile monitors for the transfer lines at the Advanced Light Source (ALS) and its upgrade (ALS-U), with the goal of enabling real-time, online beam...
The Synchrotron Light Research Institute (SLRI) operates the SPS-I facility located in Nakhon Ratchasima, Thailand, which provides synchrotron light for various scientific and industrial applications. The linac injector, serving as the primary injector, is responsible for electron beam bunching and acceleration to 40 MeV, after which the beam is transported to the booster ring via the...
Pinhole cameras serve as the primary diagnostic for emittance and energy spread measurements in the storage ring of Diamond Light Source. Similar pinhole cameras will be employed for the Diamond-II upgrade, to enable direct imaging of the stored beam while also allowing for the monitoring of skew, profile, position, and instabilities. The emittance and coupling are calculated from the acquired...
Real-time beam monitoring is essential for enhancing the efficacy and reliability of radiotherapy. FLASH radiotherapy has shown a strong potential in improving treatment effectiveness by delivering doses at ultrahigh dose rates (>40 Gy/s). Beam monitoring at FLASH is challenging, as existing devices like Ionization chambers face saturation. We are developing an all-optical monitor for...
PEPITES* is an ultra-thin and wide dynamic range charged particle beam profiler. Its signal uses secondary electron emission, effective with only O(10 nm) of matter and highly linear with beam intensity. Thin film techniques are used for the sensitive area, enabling multiple monitor variants. Typical electrodes are membranes with 50 nm thick gold strips or fully metallized. Several systems...
The Beam Gas Curtain (BGC) is an instrument for transverse diagnostics in operation at the Large Hadron Collider (LHC). The transverse beam profile is obtained by imaging the fluorescence light resulting from the interaction between the beam and a thin supersonic neon gas jet. This technique can provide minimally invasive and absolute measurements of both proton and ion beams, throughout the...
This paper investigates the signal characteristics of Titanium, Tungsten, and Carbon materials used in a secondary electron emission grid setup at CERN's North Area. Periodic scans were conducted to reconstruct beam profiles and assess the performance of these materials, configured as wires and bands, under slow-extracted 400 GeV protons. The study aims to inform the design and optimization of...
In the framework of SOLEIL-II, the project of SOLEIL's storage ring upgrade towards lower emittances, preliminary studies were performed to pinpoint the resolution limits of the exisiting pinhole cameras.
However, while reducing the vertical emittance from the SOLEIL's nominal 50 pm.rad value to 8 pm.rad, unexpected filaments were observed in the image plane of the pinhole cameras, severely...
The beam halo can contribute to beam losses in accelerators and is very difficult to measure. With an increase in beam intensity following the PIP-II upgrade at Fermilab, the beam losses are expected to be higher with some coming from beam halo. Therefore, it is important to measure the sources of beam halo to minimize the beam losses. A modified Halo Monitor developed by J-PARC will be...
In the China Spallation Neutron Source (CSNS), an Ion Profile Monitor (IPM) was installed in the Rapid Cycling Synchrotron (RCS) to address challenges in measuring strong-current beam profiles and enable real-time monitoring. This study focuses on the preliminary analysis of IPM data signals, aiming to accurately extract critical beam information from the signals. Residual gas components in...
A non-invasive photon-detection beam profile monitor using a gas sheet, named the gas sheet monitor, has been developed. Our gas sheet is formed based on rarefied gas dynamics. To obtain a beam profile quantitatively, we have also devised a beam reconstruction method with a response function measurement method. These methods gave a 2-D beam profile of a high-intensity 3 MeV beam at the J-PARC...
SuperKEKB is a high luminosity electron-positron collider that aims to achieve an instantaneous luminosity ten times higher than the present world luminosity record by SuperKEKB itself. However, stable operation is hampered by a phenomenon known as Sudden Beam Loss (SBL), where beam instability occurs within tens of microseconds, resulting in significant beam loss and triggering a beam abort....
SIRIUS, the Brazilian 4th generation synchrotron light source, has been in operation since 2020. Over time, insertion devices (IDs) are expected to populate its straight sections. To supress edge effects from undulators and support overall beam stability, a feedforward correction system is currently available through EPICS layer for the first installed ID. However, performance could be...
Space charge effect was considered a driving force for emittance growth in high-intensity beams. To understand it, the emittance needs to be measured. In the past, the quadruple scan was one of the simple and efficient methods to measure beam emittance, but it is difficult to apply to high-intensity beams where the space charge plays a dominant role due to the deviation from the quadratic...
The Electron Ion Collider (EIC) requires an electron cooler operating at the EIC injection energy to obtain the design proton beam emittances. A non-magnetized RF-based electron cooler, the EIC Low Energy Cooler (LEC), is currently under design. It will be operating at γ-factor 25 and will be delivering 70 mA electron current to a 170 m long cooling section (CS). To obtain required cooling an...
The CERN Beam Instrumentation group is currently investigating a radiation-hard beam profile monitor for the CERN North Area. Our main efforts are now focused on straw tubes, a type of wire chamber detector that offers the advantage of being vacuum-compatible and easily equipped with in/out motorisation. We have launched an extensive testing campaign across several CERN accelerators to...
A new harp has been installed in the Ring To Target Beam line (RTBT) section of Spallation Neutron Source. The Harp is made of two planes with 30 titanium 50 micron wide wires each plane. The narrow, low-Z wires versus the 100 micron tungsten wires of the original harp, are to minimize the beam scattering. This harp will be both a backup and a complement to the existing harp further...
The bunch-by-bunch feedback system is now an key function in high-current, multi-bunch storage rings to suppress coupled-bunch instability and/or to reduce the effects of injection vibration. In high-luminosity e+e- colliders such as SuperKEKB, strong beam-beam interactions occur due to collisions, which usually introduce very wide frequency response on the transverse bunch motion far out of...
NanoTerasu is a 3 GeV light source newly constructed in Sendai, Japan. The circumference is 349 m and the natural emittance is 1.1 nm rad, which is realized by a double-double-bend achromat lattice. The commissioning of the storage ring started in June 2023. The longitudinal instability was observed when the stored beam current reached 150 mA in August 2023. The temperature of RF cavity was...
Oscillating arm wire monitors are in use at PSIs HIPA facility since the 1970s. Molybdenum wires or foils, carbon fibres, or tungsten blades are passed through the proton beam in the 0.87 MeV, 72 MeV and 590 MeV beam lines to measure secondary electron emission current. We are developing an improved monitor to serve in the new proton beam lines of the IMPACT project, as spares, and later as...
Accurate and continuous measurement of the transverse beam profile is essential for optimizing the performance of particle accelerators. At the Large Hadron Collider (LHC), this task is performed non-invasively by the Synchrotron Radiation Telescope (BSRT). Operational since Run 2, the BSRT has undergone upgrades enhancing its reliability and performance. It operates under conditions that pose...
We present a robust simulation framework for using Optical Synchrotron Radiation (OSR) as a non-invasive tool to extract the transverse emittance of relativistic electron beams in advanced accelerator facilities. As next-generation accelerators target higher brightness and lower emittance, conventional diagnostics may fall short. OSR, coupled with an optimized optical transport system, offers...
A beam gas curtain (BGC) monitor was installed in the LHC for continuous transverse beam profile and emittance measurement. A molecular gas curtain was injected into the LHC continuously. In this work, a pulsed gas jet operation was proposed to minimize the introduction of gas molecules to the beam line and optimize the background pressure. The study was conducted on a gas curtain beam profile...
In the Karlsruhe Research Accelerator (KARA), electron beams of up to 200 mA are stored with an energy of 2.5 GeV, while injection is performed at 500 MeV. At the injection energy, the beam life time and the injection efficiency depend largely on Touschek scattering. As a counter-measure, the beam size can be enlarged transversally by an excitiing modulation, e.g. applied via a strip-line....
High-brightness, megahertz-rate electron sources are a curial component of future light sources, including the Linac Coherent Light Source II High Energy project, the continuous wave (cw) operation mode of the European X-ray Free-Electron Laser, or the superconducting rf (SRF) photoinjector at SEALAB at Helmholtz-Zentrum Berlin. The Helmholtz-Zentrum Dresden-Rossendorf has employed an SRF gun...
Organic scintillators offer high sensitivity and fast response but face challenges in achieving both high spatial resolution and rapid acquisition, and are prone to radiation damage. We present a novel beam profiler based on silicon microchannels filled with scintillating resin, each individually read out by a photodiode array connected to custom microcontroller-based electronics. The...
During CERN’s Long Shutdown 2 (LS2) in 2022, the Anti-Proton Decelerator (AD) target area underwent major renovations, including a significant upgrade to its beam imaging system. The previous tube-based camera, used in a high-radiation environment, had limitations in sensitivity and resolution for continuous measurements.
The upgraded design uses an innovative in-air light-emitting screen...
Siam Photon Source I (SPS-I) is a 1.2-GeV synchrotron facility in Thailand, operated by the Synchrotron Light Research Institute (SLRI), providing synchrotron radiation for various applications to the user community. The SPS-I linac injector generates 40-MeV electron bunches, which are then transported to the booster synchrotron via the Low-Energy Beam Transport line (LBT). To ensure effective...
We present an upgraded beam monitoring system designed for use in high-radiation environments where conventional imaging solutions rapidly degrade. In the presented device the radiation-sensitive P47 phosphor screen of the previous system* is replaced with a radiation-hard Chromox ceramic scintillator and relocates the CMOS camera outside the irradiation zone by transmitting the optical signal...
Non-destructive methods for measuring beam qualities like transverse beam profile are at times preferable for a range of reasons, including less down time and more reliability. These methods are, however, not always viable, for example for lack of space at the interaction point, where users typically place instrumentation needed for their experiment. In this paper we present a Machine Learning...
Shifting RF phases is a common task in particular at particle accelerators. Which RF frequencies need to be shifted is highly facility dependent, which demands a wide range phase shifter. The phase shifter presented in this contribution consists of a custom board, that includes a high-performance quadrature modulator, voltage regulators and an 16-bit digital-to-analogue converter that offers...
The High Energy Photon Source (HEPS) is the fourth-generation synchrotron light source with a beam energy of 6 GeV, developed by the Institute of High Energy Physics. As a essential partment of the HEPS, The Fast Orbit Feedback (FOFB) systemhas been developed to maintain the beam orbit stability. In this work, a neural network-based algrithm has been designed and developed to replace the...
