WEP —  Wednesday Poster Session   (14-Sep-22   14:30—16:00)
Paper Title Page
WEP04 Dual channel FMC High-Voltage Supply 383
 
  • W. Viganò, J. Emery, M. Saccanipresenter
    CERN, Meyrin, Switzerland
  
  The Beam Loss Monitoring (BLM) detectors and electronics are installed along the CERN accelerators to provide measurements of the beam loss as well as protection from them when excessive. Majority of the BLM detector types require voltage biasing up to 2000VDC with the possibility to generate voltage modulation patterns to verify the connection chain of the detectors to the front-ends. Currently, the power supply solution consists of COTS large format power supplies with additional custom electronics and various interconnections to provide monitoring and remote control. For this reason, a market search has been done to identify a high reliability module suitable for dedicated BLM installations composed by a few detectors. The outcome of the market search has justified the need to design a low cost custom board, compatible with the CERN infrastructure and different detector types, as well as allow easy customization to cover various installation architectures and voltage range needs. Main characteristics could be summarized with the following points: completely remote controlled and autonomous system, common hardware for different applications, only need to change DC\DC converter.
Other characteristics: few more components for different application and make a model smaller than what is currently used as high voltage power supplies. 		 
poster icon Poster WEP04 [1.216 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP04  
About • Received ※ 06 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 05 November 2022
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WEP05
 Online Machine Learning Version of the SNS Differential Beam Current Monitor  
 
  • W. Blokland, F. Liu, N.R. Miniskar, P. Ramuhalli, A.R. Young, A.P. Zhukov
    ORNL, Oak Ridge, Tennessee, USA
  • K. Rajput, M. Schram
    JLab, Newport News, Virginia, USA
  • Y.A. Yucesan
    ORNL RAD, Oak Ridge, Tennessee, USA
  
  Funding: This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE).
We have duplicated the Spallation Neutron Source (SNS) Differential beam Current Monitor (DCM) and included Machine Learning algorithms to observe the beam condition by looking for errant beam event precursors. The new system runs in parallel to the existing operational system and receives the same beam current signals but can be modified without affecting Operations. The archived data from the operational DCM was used to prove the existence of precursors and to generate the models. The new system has implemented Siamese Twin models on the real-time OS and a Random Forest model in the FPGA of the system. The system can also stream all acquired data at full rates to a data server for archival and online analysis. We discuss the setup and initial results. 		 
poster icon Poster WEP05 [1.258 MB]  
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WEP06 An LHC Protection System Based on Fast Beam Intensity Drops 387
 
  • M. Gąsior, T.E. Levens
    CERN, Meyrin, Switzerland
  
  The Large Hadron Collider (LHC) is protected against potentially dangerous beam losses by a distributed system based on some four thousand beam loss monitors. To provide an additional level of safety, the LHC has been equipped with a system to detect fast beam intensity drops and trigger a beam dump for potentially dangerous rates. This paper describes the architecture of the system and its signal processing, optimized to cope with dump thresholds in the order of 0.01 % of the circulating beam intensity. The performance of the installed system is presented based upon beam measurements.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP06  
About • Received ※ 10 September 2022 — Revised ※ 11 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 22 November 2022
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WEP07 Influence of the Beam Induced Irradiation on the Critical Current Phenomena in Superconducting Elements 391
 
  • J. Sosnowski
    NCBJ, Świerk/Otwock, Poland
  
  Currently developed nuclear accelerators more and more widely use superconducting elements especially in windings of superconducting electromagnets and current leads to them. These elements are however sensitive to the irradiation caused by primary beam as well as by secondary particles, as it is the case for PolFEL. In the paper it is discussed how this irradiation damages the subtle structure of superconducting materials, leading to columnar defects formation in 2D HTc superconductors. It is analysed, in which way created nano-sized structural defects influence the critical current properties of the superconducting materials, in the process of capturing of the magnetic pancake vortices. Various initial positions of the captured vortices are analysed; their movement leads to potential barrier variations. Influence of the irradiation effects on the current-voltage characteristics of superconductors are investigated then and maximal current density detected as the function of irradiation dose, nano-defects size and physical parameters as magnetic field and temperature.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP07  
About • Received ※ 07 September 2022 — Revised ※ 13 September 2022 — Accepted ※ 15 September 2022 — Issue date ※ 11 December 2022
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WEP08 Upgrade of the BPM Long Term Drift Stabilization Scheme Based on External Crossbar Switching at PETRA III 395
 
  • G. Kube, F. Schmidt-Föhre, K. Wittenburg
    DESY, Hamburg, Germany
  • A. Bardorfer, L. Bogataj, M. Cargnelutti, P. Leban, M.O. Oblak, P. Paglovec, B. Repič
    I-Tech, Solkan, Slovenia
  
  PETRA IV at DESY will be an upgrade of the present synchrotron radiation source PETRA III into an ultra low-emittance source with beam emittance of about 20 pm.rad which imposes stringent requirements on the machine stability. In order to measure beam positions and control orbit stability to the required level of accuracy, a high resolution BPM system will be installed which consists of about 800 monitors with the readout electronics based on MTCA.4. In order to fulfill the requested long-term drift requirement (< 1 micron over 7 days), also the BPM cable paths have to be stabilized because of the PETRA-specific machine geometry. To achieve this, the crossbar switching concept was extended such that the analogue switching part is separated from the read-out electronics and brought as close as possible to the BPM pickup. While first measurements were presented before, meanwhile the system has undergone a major revision, especially the external switching matrix changed from a prototype setup to a system close to the final design. This contribution summarizes the latest measurements from PETRA III, demonstrating the high performance of the external stabilization concept.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP08  
About • Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 11 September 2022 — Issue date ※ 18 October 2022
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WEP09 Preliminary Evaluation of the MTCA.4 BPM Electronics Prototype for the PETRA IV Project 399
 
  • P. Leban, A. Bardorfer, L. Bogataj, M. Cargneluttipresenter, M.O. Oblak, P. Paglovec, B. Repič
    I-Tech, Solkan, Slovenia
  • G. Kube, F. Schmidt-Föhre, K. Wittenburg
    DESY, Hamburg, Germany
  
  Within the PETRA IV project at DESY, the synchrotron radiation source PETRA III will be upgraded into a low-emittance source. The small beam emittance and reduced beam size imply stringent requirements on the machine stability. To meet the requirements on position measurement and orbit stability, a high-resolution BPM system will be installed in the new machine, with about 800 BPMs and MTCA.4-based readout electronics. In the TDR phase of the project, I-Tech and DESY are cooperating on the realization of a BPM prototype that will demonstrate the feasibility of reaching the PETRA IV requirements. Several analog, digital and SW parts are taken from the Libera Brilliance+ instrument and are reused in the MTCA.4 BPM prototype, with some innovations. One of them is the separation of the RF switch matrix used for long-term stabilization: placing it near the BPM enables also the long RF cables to be stabilized. An 8 channel RTM board, able to acquire signals from two BPMs was developed and is also tested. This paper presents an overview of the BPM electronics prototype and the promising test results achieved in the Instrumentation Technologies’ laboratory with the first boards produced.  
poster icon Poster WEP09 [3.499 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP09  
About • Received ※ 01 September 2022 — Revised ※ 11 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 23 September 2022
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WEP10 Detection of a DC Electric Field Using Electro-Optical Crystals 403
 
  • A. Cristiano, M. Krupa
    CERN, Meyrin, Switzerland
  • R. Hill
    University of Huddersfield, Huddersfield, United Kingdom
  
  Standard beam position monitors (BPM) are intrinsically insensitive to beams with no temporal structure, so-called DC beams, which many CERN experiments rely on. We therefore propose a novel detection technique in which the usual BPM electrodes are replaced with electro-optic (EO) crystals. When exposed to an electric field, such crystals change their optical properties. This can be exploited to encode the electric field magnitude onto the polarisation state of a laser beam crossing the crystal. An additional EO crystal, placed outside the vacuum chamber, can be used to control the system’s working point and to introduce a sinusoidal modulation, allowing DC measurements to be performed in the frequency domain. This contribution presents the working principle of this measurement technique, its known limitations, and possible solutions to further increase the system’s performance. Analytical results and simulations for a double-crystal optical chain are benchmarked against the experimental data taken on a laboratory test bench.  
poster icon Poster WEP10 [0.940 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP10  
About • Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 15 September 2022 — Issue date ※ 03 December 2022
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WEP11
 Beam Based Calibration of Button Type Beam Position Monitor at MEBT of RAON  
 
  • J.W. Kwon, G.D. Kim
    IBS, Daejeon, Republic of Korea
  • E.H. Lim
    Korea University Sejong Campus, Sejong, Republic of Korea
  
  The RAON(Rare-isotope Accelerator complex for ON-line experiments) is an accelerator for heavy ions, such as uranium, oxygen and argon. 60 button beam position monitors was fabricated for the SCL3 that accelerate and deliver the beam from 0.5 MeV/u to 18.5 MeV/u in a uranium case. The beam has bunch structure after the RFQ at 0.5 MeV/u, the lowest energy measurable by BPM. Developed electronics measure positions using IQ method for 1st, 2nd and 3rd harmonic frequencies of 81.25 MHz. Calibration factors of BPM for the three frequency harmonic components were obtained taking into account the frequency dependence of the electronics at wire test bench. To measure the correction factor based on the acceleration beam, a movable stage equipped with a micrometer was prepared on a one-dimensional plane. We present the beam-based calibration test results of button-type BPM for low-beta and heavy-ion beams at MEBT of RAON.  
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WEP12 HL-LHC BPM System Development Status 408
 
  • M. Krupa, I. Degl’Innocenti, D. Gudkov, G. Schneider
    CERN, Meyrin, Switzerland
  • D.R. Bett
    JAI, Oxford, United Kingdom
  
  The demanding instrumentation requirements of the future High Luminosity LHC (HL-LHC) require 44 newly designed Beam Position Monitors (BPM) to be installed around the ATLAS and CMS experiments in 2026-2028. Three BPM types are now in pre-series production, with two more variants under design. Close to the collision point, a set of cryogenic directive coupler BPMs equipped with a brand new acquisition system based on nearly-direct digitization will resolve the position of the two counter-rotating LHC beams occupying a common vacuum chamber. Other new button and stripline BPMs will provide not only the transverse beam position, but also timing signals for the experiments, and diagnostics for the new HL-LHC crab cavities. This contribution summarizes the HL-LHC BPM specifications, gives an overview of the new BPM designs, reports on the pre-series BPM production status and plans for series manufacturing, outlines the foreseen acquisition system architecture, and highlights the first beam measurements carried out with the proof-of-concept electronics for the directive stripline BPMs.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP12  
About • Received ※ 09 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 11 September 2022 — Issue date ※ 03 October 2022
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WEP13
 Status of the uTCA Digitizer BPM Design for SARAF Phase II  
 
  • P. Gil, J. Fernández
    7S, Peligros (Granada), Spain
  • G. Desmarchelier, R.D. Duperrier
    CEA-DRF-IRFU, France
  • G. Ferrand, N. Pichoff, C. Simon
    CEA-IRFU, Gif-sur-Yvette, France
  
  One of the crucial monitoring systems of any particle accelerator is the Beam Position Monitor (BPM). The purpose of a BPM is to provide information on the position, phase and current of the beam along the accelerator line. CEA Saclay must provide all beam diagnostics for SARAF-LINAC PHASE II in particular BPM. Based on the technical specifications of the CEA, Orolia-Spain is in charge of the design, development, manufacture and testing of the electronic system. A preliminary version of this system has been already tested at Orolia’s and CEA installations and the first results are going to be shown. The architecture, design and development as well as the performance of the BPM system will be presented in this paper. The benefits of the proposed architecture and the first results obtained under different conditions will be detailed  
poster icon Poster WEP13 [0.972 MB]  
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WEP14 Cavity BPM Electronics for SINBAD at DESY 413
 
  • B. Lorbeer, H.T. Duhme, I. Krouptchenkov, T. Lensch, D. Lipka, S. Vilcins, M. Werner
    DESY, Hamburg, Germany
  
  The SINBAD(Short and INnovative Bunches and Accelerators at DESY ) R&D accelerator is planned for studying new concepts for high gradient electron beam acceleration and the generation of ultra-short electron bunches. The accelerator called ARES(Accelerator Research Experiment At DESY) is composed of S-band accelerating structures. In order to achieve the goal of very short electron bunches the electron beam charges generated in the RF Gun can vary in a range from 1nC down to 500fC. In order to measure the beam position with good resolution at the small charge end of 500fC a new cavity BPM(beam position monitor) has been developed. One key component in the BPM system is the custom RF electronics to meet the resolution requirements in the entire charge range. The entire BPM system with a focus on the system design requirements and the utca based RF electronics are presented in this paper.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP14  
About • Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 12 December 2022
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WEP15 XFEL Photon Pulse Measurement Using an All-Carbon Diamond Detector 416
 
  • C. Bloomer, L. Bobb
    DLS, Oxfordshire, United Kingdom
  • W. Freund, J. Grünert, J. Liu
    EuXFEL, Schenefeld, Germany
  • M.E. Newton
    University of Warwick, Coventry, United Kingdom
  
  The European XFEL can generate extremely intense, ultra-short X-ray pulses at MHz repetition rates. Single-crystal CVD diamond detectors have been used to transparently measure the photon beam position and pulse intensity. The diamond itself can withstand the power of the beam, but the surface electrodes can be damaged since a single pulse can already exceed the damage threshold of the electrode material. Presented in this work are pulse intensity and position measurements obtained at the European XFEL using a new type of all-carbon single-crystal diamond detector developed at Diamond Light Source. Instead of traditional surface metallisation, the detector uses laser-written graphitic electrodes buried within the bulk diamond. There is no metallisation in the XFEL X-ray beam path that could be damaged by the beam. The results obtained from a prototype detector are presented, capable of measuring the intensity and 1-dimensional X-ray beam position of individual XFEL pulses. These successful measurements demonstrate the feasibility of all-carbon diagnostic detectors for XFEL use.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP15  
About • Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 23 September 2022
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WEP16 PSF Characterization of the ALBA X-Ray Pinholes 421
 
  • U. Iriso, A.A. Nosych, M. Zeus
    ALBA-CELLS, Cerdanyola del Vallès, Spain
  • A.C. Cazorla
    ICMAB, Bellatera, Spain
  • I. Mases Solé
    CERN, Meyrin, Switzerland
  
  ALBA is currently equipped with two x-ray pinhole cameras for continuous beam size monitoring using the synchrotron radiation from two different bending magnets. The first pinhole was installed in day-1 and it is working properly since 2012 as the work-horse for the ALBA emittance measurements, while the second one has been commissioned in beginning 2021 for redundancy purposes. This paper summarizes the exercises to characterize the Point Spread Function (PSF) of both pinhole cameras using analytical calculations, SRW simulations, and experimental measurements using the beam lifetime.  
poster icon Poster WEP16 [1.447 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP16  
About • Received ※ 06 September 2022 — Revised ※ 12 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 18 September 2022
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WEP17 Electron Emission (SEM) Grids for the FAIR Proton Linac 426
 
  • J. Herranz
    Proactive Research and Development, Sabadell, Spain
  • I. Bustinduy, Á. Rodríguez Páramo
    ESS Bilbao, Zamudio, Spain
  • P. Forck, T. Sieber
    GSI, Darmstadt, Germany
  • A. Navarro Fernandez
    CERN, Meyrin, Switzerland
  
  New SEM-Grid has been developed for FAIR Proton Linac, the instrument consists of 2 harps fixed together in an orthogonal way. This SEM-Grid will provide higher resolution and accuracy measurements as each harp consists of 64 tungsten wires 100 micro-meter in diameter and 0.5 mm pitch. Each wire is fixed to a ceramic PCB with an innovative dynamic stretching system, this system assures wire straightness under typical thermal expansion due to beam heat deposition. Electric field distribution has been performed, 3 main parameters have been optimized, wires distribution, quantity of polarization electrodes and distance between electrodes and wires. The design and production of the SEM-Grids have been performed by the company Proactive R&D that has count on the expertise of ESS-Bilbao to define safe operation limits and signal estimation by means of a code developed specifically for this type of calculations. Preliminary validations of the first prototypes shown good values of electric field behaviour signal. After additional beam test validations to be performed on June 2022, final series of the SEM-Grid will be produced and installed on FAIR proton LINAC.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP17  
About • Received ※ 07 September 2022 — Revised ※ 15 September 2022 — Accepted ※ 18 September 2022 — Issue date ※ 22 September 2022
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WEP18
 Diagnostic Station of Proton Beam at KAHVELab (PTAK)  
 
  • D. Halis, M. Serin
    YTU, Istanbul, Turkey
  • A. Adiguzel, S. Esen, S. Oz
    Istanbul University, Istanbul, Turkey
  • H. Cetinkaya
    Dumlupinar University, Faculty of Science and Arts, Kutahya, Turkey
  • T.B. Ilhan
    Bogaziçi University, Kandilli Accelerator, Istanbul, Turkey
  • S. Ogur
    Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
  • E.V. Ozcan
    Bogazici University, Bebek / Istanbul, Turkey
  • G. Unel
    UCI, Irvine, California, USA
  
  Funding: This study is supported by Istanbul University Scientific Research Commission Project ID 33250 and TUBITAK Project no : 119M774.
A testbeam using a Radio Frequency Quadrupole (RFQ) operating at 800 MHz, to accelerate a 1.5mA proton beam to 2MeV energy has been designed, manufactured and is currently being commissioned at KAHVELab, Istanbul. The beam from the microwave discharge ion source (IS) must be matched to the RFQ via an optimized Low Energy Beam Transport (LEBT) line which also contains an integrated measurement station, called MBOX. The MBOX is designed to measure the beam current and profile, as well as the beam emittance, to ensure an accurate match between IS and RFQ. It includes a number of diagnostic tools: a Faraday Cup, a scintillator screen, and a pepper pot plate (PPP). During the commissioning, beam images were taken at different points on the beamline. Other measurements were also taken with different screen materials and different plates in the MBOX box. The analysis software was also developed and tested for the PP photo analysis. This contribution will present the proton beamline components, MBOX diagnostic tools and will focus on the measurements, especially on the PPP emittance analysis. 		 
poster icon Poster WEP18 [12.135 MB]  
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WEP19
 A Raster Scanning Laser-Sculptor for Hydrogen Ion Beam Diagnostics  
 
  • S.M. Gibson, L.J. Nevay
    Royal Holloway, University of London, Surrey, United Kingdom
  • S.E. Alden
    JAI, Egham, Surrey, United Kingdom
  
  Funding: We acknowledge funding by the STFC Grant ST/P003028/1 and the John Adams Institute’ at Royal Holloway, University of London.
A novel scheme for laser sculpting a neutralised hydrogen beam from a parent beam of hydrogen ions circulating in a racetrack accelerator was proposed at IPAC19*. Such a method was shown in simulation to produce a particle beam with reduced transverse emittance, based on a simple static laser sculptor geometry. This paper investigates effects of translating or raster scanning a focussed laser-sculptor transversely within the hydrogen ion beam, which creates new possibilities for non-invasive beam diagnostics of the transverse phase space. The optimisation of the optical geometry, intensity and the temporal characteristics of the laser beam are investigated for laser-induced extraction of neutralised beamlets, from which the beam profile and emittance can be reconstructed. Photo-detachment simulations are performed in a photon-particle interaction framework that has been implemented in BDSIM, a Geant4 based particle tracking code**. We evaluate the design of a potential experimental demonstration at a hydrogen ion linac, the Front End Test Stand, at Rutherford Appleton Laboratory, UK.
* Laser sculpted cool proton beams, S. Gibson, S. Alden, L. Nevay.
** A simulation framework for photon-particle interactions for laserwires and further applications
S. Alden, L. Nevay, S. Gibson 		 
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WEP20 Emittance Diagnostics at PETRA IV 430
 
  • M. Marongiu, G. Kube, M. Lantschner, A.I. Novokshonov, K. Wittenburg
    DESY, Hamburg, Germany
  
  The PETRA IV project will be a Diffraction Limited Light Source designed to be the successor of PETRA III, the 6 GeV 3rd generation hard X-Ray synchrotron light source at DESY in Hamburg. It will operate at a beam energy of 6 GeV with a design emittance of 20/4 pm rad. For a precise emittance online control, two dedicated diagnostics beamlines will be built up to image the beam profile with synchrotron radiation in the X-Ray region. With two beamlines, it will be possible to extract both the transverse beam emittances and the beam energy spread. Both beamlines will be equipped with two interchangeable X-Ray optical systems: a pinhole camera system to achieve high dynamic range and a Fresnel Diffractometry system for high resolution measurements in the range 1-18 um. This paper describes the planned setup and deals with the possible limitations.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP20  
About • Received ※ 05 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 11 September 2022 — Issue date ※ 26 September 2022
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WEP21 Merits of Pulse Mode Operation of Residual Gas Ionization Profile Monitor for J-PARC Main Ring 434
 
  • K. Satou, Y. Sato
    J-PARC, KEK & JAEA, Ibaraki-ken, Japan
  • S. Igarashi
    KEK, Ibaraki, Japan
  
  Funding: Accelerator and Beamline Research and Technology Development for High-Power Neutrino Beams in the U.S.-Japan Science and Technology Cooperation Program in High Energy Physics.
The measurement accuracy of the ionization profile monitor (IPM) of J-PARC main ring (MR) depends on the flatness and stability of the gain of the position-sensitive microchannel plate (MCP). The flatness of the MCP deteriorates after long-term operation; the gain of the central area selectively decreases as the integrated output charge increases. The beam-based calibration, where the local bump shifts the beam and the reconstructing beam profiles determine the gain distribution, is used to calibrate the flatness. The immediate gain drop occurs when the output current from the MCP becomes comparable to the bias current is problematic. This gain drop depends on the bias voltage and the output current; thus, it is difficult to calibrate. A pulsed HV module of 30 kV, which collects ionized electrons and ions, was installed to solve these problems. The pulse mode operation can modulate the averaged output current from the MCP to improve gain stability. Profiles of the intense beam up to 3.3·1013 ppb were measured and compared with those measured by destructive profile monitors in beam transport lines 3’50 BT, and the Abort line. Estimated emittances were consistent at ±20%. 		 
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP21  
About • Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 16 October 2022
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WEP22 Experimental Investigation of Gold Coated Tungsten Wires Emissivity for Applications in Particle Accelerators 438
 
  • A. Navarro Fernandez, M. Martin Nieto, F. Roncarolo
    CERN, Meyrin, Switzerland
  
  The operation of wire grids and wire scanners as beam profile monitors can be heavily affected, both in terms of measurement accuracy and wire integrity, by the thermal response of the wires to the energy deposited by the charged particles. Accurate measurements of material emissivity are crucial, as Radiative Cooling represent the most relevant cooling process. In this work, we present a method for emissivity measurements of gold-coated tungsten wires based on calorimetric techniques. The dedicated electrical setup allowed allowed transient and steady state measurements for temperatures up to 2000 K. A theoretical description of the measurement technique will be followed up by the electrical set up description and a detailed discussion about the measured results and uncertainties.  
poster icon Poster WEP22 [1.586 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP22  
About • Received ※ 06 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 16 September 2022
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WEP23 Assessing the Performance of the New Beam Wire Scanners for the CERN LHC Injectors 443
 
  • S. Di Carlo, W. Andreazza, D. Belohrad, J. Emery, J.C. Esteban Felipe, A. Goldblatt, D. Gudkov, A. Guerrero, S. Jackson, G.O. Lacarrere, M. Martin Nieto, A.T. Rinaldi, F. Roncarolo, C. Schillinger, R. Veness
    CERN, Meyrin, Switzerland
  
  The ability of reliably measuring the transverse beam profile in its injectors is essential for the operation of the LHC. This report aims to assess the reliability, stability, and reproducibility of the new generation of beam wire scanners developed at CERN in the framework of the LHC Injectors Upgrade (LIU). The study includes data from the over 60000 scans performed in 2021 and 2022, with a special focus on reproducibility, investigation of optimal operational settings to ensure a large dynamic range, and evaluation of absolute accuracy through comparison with other instruments present in the injectors.  
poster icon Poster WEP23 [1.590 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP23  
About • Received ※ 06 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 11 September 2022 — Issue date ※ 10 December 2022
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WEP24 Modeling and Experimental Evaluation of a Bunch Arrival-Time Monitor with Rod-Shaped Pickups and a Low-Pi-Voltage Ultra-Wideband Traveling Wave Electro-Optic Modulator for X-Ray Free-Electron Lasers 447
 
  • K. Kuzmin, E. Bründermann, A.-S. Müller, G. Niehues
    KIT, Karlsruhe, Germany
  • W. Ackermann, H. De Gersem
    TEMF, TU Darmstadt, Darmstadt, Germany
  • M.K. Czwalinna, H. Schlarb
    DESY, Hamburg, Germany
  • C. Eschenbaum, C. Koos, A. Kotz, A. Schwarzenberger
    IPQ KIT, Karlsruhe, Germany
  • A. Penirschke, B.E.J. Scheiblepresenter
    THM, Friedberg, Germany
  
  X-ray Free-Electron Laser (XFEL) facilities, such as the 3.4-km European XFEL, use all-optical links with electro-optic bunch arrival-time monitors (BAM) for a long-range synchronization. The current BAM systems achieve a resolution of 3.5 fs for 250 pC bunches. Precise bunch arrival timing is essential for experiments, which study ultra-fast dynamical phenomena with highest temporal resolution. These experiments will crucially rely on femtosecond pulses from bunch charges well below 20 pC. The state-of-the-art BAMs are not allowing accurate timing for operation with such low bunch charges. Here we report on the progress in development of an advanced BAM (system) based on rod-shaped pickups mounted on a printed circuit board and ultra-wideband travelling-wave electro-optic modulators with low operating voltages. We perform modeling and experimental evaluation for the fabricated pickups and electro-optic modulators and analytically estimate timing jitter for the advanced BAM system. We discuss an experimental setup to demonstrate joint operation of new pickups and wideband EO modulators for low bunch charges less than 5 pC.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP24  
About • Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 13 October 2022
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WEP25 Installation and Commissioning of the Pulsed Optical Timing System Extension 451
 
  • F. Rossi, M. Ferianis
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  
  At the FERMI FEL user facility, a fully optical timing system has been operated, to synchronize it, since the start of machine commissioning, back in 2009. In the past years the system has been progressively extended to support more clients. The latest upgrade is focusing on the pulsed subsystem which provides the phase reference to remote lasers and the bunch arrival monitor diagnostic stations. In origin the pulsed subsystem had a capacity to feed simultaneously six stabilized fiber links. The upgrade to the original layout makes it possible to install up to eight new additional links. Here we will describe the new setup and the results achieved in terms of short- and long-term stability.  
poster icon Poster WEP25 [3.843 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP25  
About • Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 08 November 2022
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WEP26 Status of a Monitor Design for Single-Shot Electro-Optical Bunch Profile Measurements at FCC-ee 455
 
  • M. Reißig, E. Bründermann, S. Funkner, B. Härer, A.-S. Müller, G. Niehues, M.M. Patil, R. Ruprecht, C. Widmann
    KIT, Eggenstein-Leopoldshafen, Germany
  
  Funding: Supported by the Doctoral School KSETA. C. W. achnowledges funding by BMBF contract number 05K19VKD. FCCIS is funded by the EU’s Horizon 2020 research and innovation programme under grant No 951754.
At the KIT electron storage ring KARA (Karlsruhe Research Accellerator) an electro-optical (EO) near-field monitor is in operation performing single-shot, turn-by-turn measurements of the longitudinal bunch profile using electro-optical spectral decoding (EOSD). In context of the Future Circular Collider Innovation Study (FCCIS), a similar setup is investigated with the aim to monitor the longitudinal bunch profile of each bunch for dedicated top-up injection at the future electron-positron collider FCC-ee. This contribution presents the status of a monitor design adapted to cope with the high-current and high-energy lepton beams foreseen at FCC-ee. 		 
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP26  
About • Received ※ 05 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 11 September 2022 — Issue date ※ 24 September 2022
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WEP28 Studies on Radially Coupled Fast Faraday Cups to Minimize Field Dilution and Secondary Electron Emission at Low Intensities of Heavy Ions 460
 
  • G.O. Rodrigues, S. Kumar, K. Mal, R. Mehta, C.P. Safvan
    IUAC, New Delhi, India
  • R. Singh
    GSI, Darmstadt, Germany
  
  Fast Faraday Cups (FFCs) are interceptive beam diagnostic devices used to measure fast signals from sub-nanosecond bunched beams and the operation of these devices is a well-established technique. However, for short bunch length measurements in non-relativistic regimes with ion beams, the measured profile is diluted due to field elongation and distortion by the emission of secondary electrons. Additionally, for short bunches with the expected intensities envisaged in the High Current Injector at the Inter University Accelerator Centre, the impedance matching of the EM structure puts severe design constraints. This work presents a detailed study on the modification of a radially-coupled coaxial FFC [1]. The field dilution and secondary electron emission aspects are modelled through EM simulations and techniques to minimise these effects are explored. This has resulted in a new design, which has a better signal to noise ratio and benefits from a more accurate bunched beam measurement.
[1] Carneiro, J.-P., et al. ’Longitudinal Beam Dynamics Studies at the Pip-II Injector Test Facility.’ International Journal of Modern Physics A, vol. 34, no. 36, 2019, p.1942013 		 
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP28  
About • Received ※ 03 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 25 October 2022 — Issue date ※ 28 November 2022
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WEP29 Optimization Study of Beam Position and Angular Jitter Independent Bunch Length Monitor for Awake Run 2 465
 
  • C. Davut
    The University of Manchester, Manchester, United Kingdom
  • Ö. Apsimon
    The University of Liverpool, Liverpool, United Kingdom
  • P. Karataev
    Royal Holloway, University of London, Surrey, United Kingdom
  • T. Lefèvre, S. Mazzoni
    CERN, Meyrin, Switzerland
  • G.X. Xia
    UMAN, Manchester, United Kingdom
  
  In this paper, a study using the Polarization Current Approach (PCA) model is performed to optimize the design of a short bunch length monitor using two dielectric radiators that produce coherent Cherenkov Diffraction Radiation (ChDR). The electromagnetic power emitted from each radiator is measuring a different part of the bunch spectrum using Schottky diodes. For various bunch lengths, the coherent ChDR spectrums are calculated to find the most suitable frequency bands for the detection system. ChDR intensities measured by each detector are estimated for different impact parameters to explore the dependence of bunch length monitor on beam position and angular jitter. It is found that, in the present configuration, the effects of beam position and angular jitter are negligibly small for bunch length measurement.
* Shevelev, M. V., & Konkov, A. S. (2014). Journal of Experimental and Theoretical Physics, 118(4), 501-511.
** Curcio, A. et al. (2020). Physical Review Accelerators and Beams, 23(2), 022802. 		 
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP29  
About • Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 09 November 2022
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WEP30 Creation of the First High-Inductance Sensor of the New CCC-Sm Series 469
 
  • V. Tympel, T. Stöhlker
    HIJ, Jena, Germany
  • L. Crescimbeni, D.M. Haider, M. Schwickert, T. Sieber, T. Stöhlker
    GSI, Darmstadt, Germany
  • F. Machalett, T. Stöhlker
    IOQ, Jena, Germany
  • M. Schmelz, T. Schönau, R. Stolz, V. Zakosarenko
    IPHT, Jena, Germany
  • F. Schmidl, T. Schönau, P. Seidel
    FSU Jena, Jena, Germany
  • V. Zakosarenko
    Supracon AG, Jena, Germany
  
  Funding: Supported by the BMBF, project number 05P21SJRB1.
Cryogenic Current Comparators (CCC) are presently used at CERN-AD (100 mm beamline diameter) and in the FAIR project at CRYRING (150 mm beamline diameter) for non-destructive absolute measurement of beam currents below 20 ’A (current resolution 10 nA). Both sensor versions (CERN-Nb-CCC and FAIR-Nb-CCC-XD) use niobium as superconductor for the DC-transformer and magnetic shielding. The integrated flux concentrators have an inductance of below 100 ’H at 4.2 Kelvin. The new Sm-series (smart & small) is designed for a beamline diameter of 63 mm and uses lead for the superconducting shield. The first sensor (IFK-Pb-DCCC-Sm-200) has two core-based pickup coils (2x 100 µH at 4.2 K) and two SQUID units, to eliminate Barkhausen current jumps as part of the low frequency 1/f-noise. During the construction some basic experiments on noise behavior (fluctuation’dissipation theorem, white noise below 2 pA/sqrt(Hz)) and magnetic shielding (flux concentrator and shielding as LC circuit resonance , additional mu-metal shielding) were undertaken, the results of which are presented here. Finally, a current resolution of 500 pA could be achieved in the laboratory. 		 
poster icon Poster WEP30 [1.474 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP30  
About • Received ※ 05 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 11 September 2022 — Issue date ※ 12 September 2022
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WEP31 Booster Fillpattern Monitor 473
 
  • F. Falkenstern, J. Kuszynski, G. Rehm
    HZB, Berlin, Germany
  
  The "Booster Fillpattern Monitor" is used to measure currents in each individual electron bunch in the booster of the BESSY II machine. The booster with its circumference of 96 meters has space for max.160 electron bunches. The distance between the electron bunches of 60cm (96m/160) is determined by the RF Master Clock ~ 499, 627MHz. In practice, fill patterns of a one to five equally spaced bunches are in use. The fill pattern monitor digitizes electrical pulses generated from a strip line using a broadband ADC. The sampling frequency is selected as an integer fraction of the bunching frequency, acquiring the full fill pattern over a number of turns. Experiments performed at BESSY II demonstrate the performance of the setup and will be discussed.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP31  
About • Received ※ 06 September 2022 — Revised ※ 12 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 24 October 2022
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WEP32 Secondary Emission Monitor Simulation, Measurements and Machine Learning Application Studies for CERN Fixed Target Beamlines 476
 
  • L. Parsons França, M. Duraffourg, F. Roncarolo, F.M. Velotti
    CERN, Meyrin, Switzerland
  • E. Kukstas, C.P. Welsch, H.D. Zhang
    The University of Liverpool, Liverpool, United Kingdom
  • C.P. Welsch, H.D. Zhang
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  
  Funding: This work was supported by CERN and the STFC Liverpool Centre for Doctoral Training on Data Intensive Science (LIV. DAT) under grant agreement ST/P006752/1.
The CERN fixed target experimental areas have recently acquired new importance thanks to newly proposed experiments, such as those linked to Physics Beyond Colliders (PBC) activities. Secondary Emission Monitors (SEMs) are the instruments currently used for measuring beam current, position and size in these areas. Guaranteeing their reliability, resistance to radiation and measurement precision is challenging. This paper presents the studies being conducted to understand ageing effects on SEM devices, to calibrate and optimise the SEM design for future use in these beamlines. These include feasibility studies for the application of machine learning techniques, with the objective of expanding the range of tools available for data analysis. 		 
poster icon Poster WEP32 [1.173 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP32  
About • Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 02 October 2022
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WEP33 Operational and Beam Study Results of Measurements with the Transverse Feedback System at the Canadian Light Source 481
 
  • S.J. Martens
    University of Saskatchewan, Saskatoon, Canada
  • T. Battenpresenter, D. Bertwistle, M.J. Boland
    CLS, Saskatoon, Saskatchewan, Canada
  
  A transverse bunch-by-bunch feedback system has been installed in the storage ring at the Canadian Light Source (CLS) to counteract beam instabilities. The 2.9 GeV electron storage ring is 171~m in circumference with 13 insertion devices currently installed, each contributing to the impedance of the ring and lowering the instability threshold. The new Transverse Feedback System (TFBS) provides improved bunch isolation, higher bandwidth amplification and diagnostics to study, understand and damp these instabilities. This paper will show and overview of the system setup, examples of operational performance and results of the diagnostic capabilities, including tune feedback, grow/damp measurements and excite/damp measurements.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP33  
About • Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 18 September 2022
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WEP34 Orbit Correction Upgrade at the Canadian Light Source 485
 
  • T. Batten, M. Bree, J.M. Vogt
    CLS, Saskatoon, Saskatchewan, Canada
  
  The Canadian Light Source is a 3rd generation synchrotron that began user operations in 2005 and now supports 22 operational beamlines. The orbit correction system was upgraded in 2021 to improve machine reliability and performance. This upgrade has also increased the diagnostic capabilities and supports easy integration of new functionality, providing the foundation for future enhancements.  
poster icon Poster WEP34 [1.209 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP34  
About • Received ※ 02 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 15 September 2022 — Issue date ※ 26 September 2022
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WEP35
 Design and Status of Fast Orbit Feedback System at SOLARIS  
 
  • G.W. Kowalski, K. Gula, R. Panaś, A.I. Wawrzyniak, J.J. Wiechecki
    NSRC SOLARIS, Kraków, Poland
  
  SOLARIS storage ring has been built with basic set of diagnostic and feedback systems. FOFB system, as much more advanced and not as critical for startup was envisioned as later addition to the design. Now, we are in the process of implementing this addition. The system’s workhorse is Instrumentation Technologies Libera Brilliance+ with its Fast Acquisition data path and customizable FPGA modules. Feedback algorithm running in hardware provides fast calculations and direct communication with fast power supplies. The hardware installation is almost finished with configuration and software works running in parallel. First measurements of response matrix and proof-of-concept tests were performed.  
poster icon Poster WEP35 [4.336 MB]  
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WEP36 Conceptual Design of the Transverse Multi-Bunch Feedback for the Synchrotron Radiation Source PETRA IV 488
 
  • S. Jabłoński, H.T. Duhme, B. Dursun, J. Klute, S.H. Mirza, S. Pfeiffer, H. Schlarb
    DESY, Hamburg, Germany
  
  PETRA IV will be a new, fourth-generation, high-brilliance synchrotron radiation source in the hard X-ray range. To keep the emittance low at high beam current an active feedback system to damp transverse multi-bunch instabilities is required. The particular challenge to the system is the very low-noise, while maintaining high bandwidth, which is defined by the 2 ns bunch spacing. In this paper, we present the conceptual design of the transverse multi-bunch feedback (T-MBFB) system and technical challenges to fulfill the performance require-ments. An overview is given on the hardware and the method for detecting and damping the coupled-bunch oscillations. Using modern high-speed ADCs enables direct sampling of pulses from beam pick-ups, which removes the necessity for down-converters. Powerful digital signal processing allows not only for the effective feedback implementation, but also for developing versa-tile tools for the machine diagnostics.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP36  
About • Received ※ 06 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 11 December 2022 — Issue date ※ 12 December 2022
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WEP37 Measurements for Emittance Feedback based on Resonant Excitation at Diamond Light Source 492
 
  • S. Preston, L. Bobbpresenter, A.F.D. Morgan, T. Olsson
    DLS, Oxfordshire, United Kingdom
  
  In the Diamond storage ring, the vertical emittance is kept at 8 pm rad by an emittance feedback which modifies the strengths of skew quadrupoles. A new feedback using a stripline kicker to control the vertical emittance by exciting the beam resonantly at a synchrotron sideband is planned to avoid modification of the optics. This is crucial for the anticipated Diamond-II upgrade of the storage ring, which will have a much smaller equilibrium emittance than the existing machine. A larger coupling is therefore needed to keep the vertical emittance at the same level, potentially reducing the off-axis injection efficiency and lifetime. Measurements of the beam oscillation and emittance have been performed at the existing storage ring to characterise the effects of chromaticity and impedance on the optimal excitation frequency, where the emittance is increased significantly while the beam oscillation is kept low. The implications for simulating the emittance feedback for the Diamond-II storage ring are also discussed.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP37  
About • Received ※ 02 September 2022 — Revised ※ 12 September 2022 — Accepted ※ 16 September 2022 — Issue date ※ 30 November 2022
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WEP38 Control System Suite for Beam Position Monitors at MAX IV 496
 
  • Á. Freitas, V. Hardion, M. Lindberg, R. Lindvall, R. Svärd, C. Takahashi
    MAX IV Laboratory, Lund University, Lund, Sweden
  
  MAX IV is a fourth generation synchrotron facility at Lund, Sweden. It is composed by a full energy linear accelerator and two storage rings with 1.5 GeV and 3 GeV, which requires hundreds of beam position monitors. In this context, Libera Single Pass E and Libera Brilliance+ are employed as BPM instruments. This paper will present an overview of the control system suite used in the facility, including the communication, data acquisition and storage pipelines, monitoring, configuration and software maintainability.  
poster icon Poster WEP38 [4.895 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP38  
About • Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 25 October 2022
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WEP39
 Development of a Sticker Sealed Microfluidic Device for In Situ Analytical Measurements Using Synchrotron Radiation  
 
  • L. Castro
    Université Paris Science et Lettres, Paris 6ème, France
  
  Funding: The authors would like to thank the financial support from CNPq, CAPES, Brazilian Center for Research in Energy and Materials (CNPEM)/29’ summer scholarship program-PBV) and FAPESP
Shedding synchrotron light on microfluidic systems, exploring several contrasts in situ/operando at the nanoscale, like X-ray fluorescence, diffraction, luminescence, and absorption, has the potential to reveal new properties and functionalities of materials across diverse areas. In this work, we present the micro-fabrication and characterization of a multifunctional polyester/glass sealed microfluidic device well-suited to combine with analytical X-ray techniques. The device consists of smooth microchannels patterned on glass, where three gold electrodes are deposited into the channels to serve in situ electrochemistry analysis or standard electrical measurements. It has been efficiently sealed through an ultraviolet-sensitive sticker-like layer based on a polyester film, and the burst pressure is determined by pumping water through the microchannel (up to 0.22 MPa). The device potentialities, and its high transparency to X-rays, have been demonstrated by taking advantage of the X-ray nanoprobe Carnaúba/Sirius/LNLS, by obtaining 2D X-ray nanofluorescence maps on the microchannel filled with water and after an electrochemical nucleation reaction.
*Whitesides, G. M. Te origins and the future of microfuidics. Nature 442, 368’373. https://doi.org/10.1038/nature05058 (2006). 		 
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WEP40 A Modern Ethernet Data Acquisition Architecture for Fermilab Beam Instrumentation 500
 
  • R.R. Santucci, J.S. Diamond, N. Eddy, A. Semenov, D.C. Voy
    Fermilab, Batavia, Illinois, USA
  
  The Fermilab Accelerator Division, Instrumentation Department is adopting an open-source framework to replace our embedded VME-based data acquisition systems. Utilizing an iterative methodology, we first moved to embedded Linux, removing the need for VxWorks. Next, we adopted Ethernet on each data acquisition module eliminating the need for the VME backplane in addition to communicating with a rack mount server. Development of DDCP (Distributed Data Communications Protocol), allowed for an abstraction between the firmware and software layers. Each data acquisition module was adapted to read out using 1GbE and aggregated at a switch which up linked to a 10GbE network. Current development includes scaling the system to aggregate more modules, to increase bandwidth to support multiple systems and to adopt MicroTCA as a crate technology. The architecture was utilized on various beamlines around the Fermilab complex including PIP2IT, FAST/IOTA and the Muon Delivery Ring. In summary, we were able to develop a data acquisition framework which incrementally replaces VxWorks & VME hardware as well as increases our total bandwidth to 10Gbit/s using off the shelf Ethernet technology.  
poster icon Poster WEP40 [0.738 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP40  
About • Received ※ 08 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 04 October 2022
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WEP41 ENeXAr: An EPICS-Based Tool for User-Controlled Data Archiving 504
 
  • J.F. Esteban Müller
    ESS, Lund, Sweden
  
  ENeXAr is a data archival tool for EPICS-based systems. It is intended as a complement for traditional data archiving solutions, to cover use cases for which they are usually not designed: mainly for limited-duration high-data rates from a subset of signals. The service is particularly useful for activities related to machine commissioning, beam studies, and system integration testing. Data acquisition is controlled via PV Access RPC commands and the data is stored in standard HDF5-based NeXus files. The RPC commands allow users to define the acquisition parameters, the data structure, and the metadata. The usage of EPICS RPC commands means that the users are not required to install additional software. Also, acquisitions can be automatized directly from EPICS IOCs.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP41  
About • Received ※ 07 September 2022 — Revised ※ 11 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 20 October 2022
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WEP42 Application of Machine Learning towards Particle Counting and Identification 508
 
  • S.E. Engel
    University of Essex, Physics Centre, Colchester, United Kingdom
  • P. Boutachkov, R. Singh
    GSI, Darmstadt, Germany
  
  An exploration into the application of three machine learning (ML) approaches to identify and separate events in the detectors used for particle counting at the GSI Helmholtz Centre for Heavy Ion Research. A convolutional neural network (CNN), a shape-based template matching algorithm (STMF) and Peak Property-based Counting Algorithm (PPCA) were developed to accurately count the number of particles without domain-specific knowledge required to run the currently used algorithm. The three domain-agnostic ML algorithms are based on data from scintillation counters commonly used in beam instrumentation and represent proof-of-work for an automated particle counting system. The algorithms were trained on a labelled set of over 150 000 experimental particle data. The results of the three classification approaches were compared to find a solution that best mitigates the effects of particle pile-ups. The two best-achieving algorithms were the CNN and PPCA, achieving an accuracy of 99.8\%.
This project has received funding from the European Union’s Horizon 2020 Research and Innovation programme under GA No 101004730. 		 
poster icon Poster WEP42 [1.370 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP42  
About • Received ※ 11 September 2022 — Revised ※ 25 October 2022 — Accepted ※ 01 December 2022 — Issue date ※ 08 December 2022
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WEP43 Control Systems of DC Accelerators at KAHVELab 512
 
  • T.B. Ilhan, A. Caglar, D. Halis
    YTU, Istanbul, Turkey, Turkey
  • A. Adiguzel, S. Oz
    Istanbul University, Istanbul, Turkey
  • H. Cetinkaya
    Dumlupinar University, Faculty of Science and Arts, Kutahya, Turkey
  • E. Elibollar, M.F. Er, A. Inanc, E.V. Ozcan
    Bogazici University, Bebek / Istanbul, Turkey
  • U. Kaya
    Istinye University, Institute of Sciences, Istanbul, Turkey
  • A. Ozbey
    IUC, Istanbul, Turkey
  • G. Türemen
    TENMAK-NUKEN, Ankara, Turkey
  • G. Unel
    UCI, Irvine, California, USA
  
  KAHVE Laboratory has two functional particle sources: thermal electrons and ionized hydrogen. Each of these are followed by DC acceleration sections, for obtaining an electron beam to accelerate electrons MeV energy level and for providing protons to the radio frequency quadrupole accelerator which are being built. So far both systems have keV energy levels. Both systems employ LabVIEW based GUIs to interact with the user and to control and monitor the DC power supplies. The vacuum gauges, turbomolecular pumps, stepper motors and high voltage power supplies are all controlled with PLCs. The equipment under high voltage, are monitored and controlled via Arduino based wifi and bluetooth wireless communication protocols. The proton beamline has additional devices for beam diagnostics which are being commissioned like pepper pot plate, scintillator screen and faraday cup. Both systems are being standardize before MeV energy level for generalize to national labs which are working on detectors and accelerators. We believe such a setup could be a low budget control and readout example for modern small experiments and educational projects.  
poster icon Poster WEP43 [14.645 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP43  
About • Received ※ 11 October 2022 — Revised ※ 18 October 2022 — Accepted ※ 25 October 2022 — Issue date ※ 07 November 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)