Keyword: timing
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MOPV005 Towards a New Control System for PETRA IV controls, interface, hardware, software 108
 
  • R. Bacher, T. Delfs, D. Mathes, T. Tempel, T. Wilksen
    DESY, Hamburg, Germany
 
  At DESY, an upgrade of the PETRA III synchrotron light source towards a fourth-generation, low emittance machine PETRA IV is currently being actively pursued. The basic concept of the control system of PETRAIV is to exploit synergies between all accelerator facilities operated by DESY. The key figures of PETRAIV’s new accelerator control system include the DOOCS control system framework, high-end MTCA.4 technology compliant hardware interfaces for triggered, high-performance applications and hardware interfaces for conventional slow-control applications compliant with industrial process control standards such as OPC UA, and enhanced data acquisition and data storage capabilities. In addition, the suitability of standards for graphical user interfaces based on novel Web application technologies will be investigated. Finally, there is a general focus on improving quality management and quality assurance measures, including proper configuration management, requirements management, bug tracking, software development, and software lifetime management. The paper will report on the current state of development.  
poster icon Poster MOPV005 [0.189 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-MOPV005  
About • Received ※ 01 October 2021       Accepted ※ 03 November 2021       Issue date ※ 10 March 2022  
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MOPV013 A Dynamic Beam Scheduling System for the FAIR Accelerator Facility controls, storage-ring, experiment, interlocks 138
 
  • S. Krepp, J. Fitzek, H.C. Hüther, R. Mueller, A. Schaller, A. Walter
    GSI, Darmstadt, Germany
 
  The new Accelerator Control System for GSI/FAIR is now being used productively for the GSI accelerator facility. As the central component for online beam orchestration, the Beam Scheduling System (BSS) is situated between the FAIR Settings Management System and the FAIR timing system. Besides device settings, the Settings Management System provides timing schedules for beam production. The primary purpose of the BSS is to define which of the beam schedules are executed by the timing system, how often and in which order. To provide runtime decisions in pre-planned execution options (e.g. skipping of a particular beam), it processes external signals like user input, experiment requests or beam prohibits provided by the interlock system. More recently, advanced features have been added that allow for dynamic execution control required by storage ring mode features such as breakpoints, repetitions, skipping and manipulations. This contribution gives an overview of the Beam Scheduling System including its interfaces.  
poster icon Poster MOPV013 [0.366 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-MOPV013  
About • Received ※ 10 October 2021       Revised ※ 01 November 2021       Accepted ※ 03 November 2021       Issue date ※ 11 March 2022
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MOPV020 Digitisation of the Analogue Waveform System at ISIS controls, Linux, real-time, diagnostics 169
 
  • W.A. Frank, B.R. Aljamal, R.A. Washington
    STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
 
  Funding: UKRI/STFC
The Analogue Waveform System (AWS) at the ISIS Neutron and Muon Source is a distributed system that allows operators to select and monitor analogue waveforms from equipment throughout the facility on oscilloscopes in the Main Control Room (MCR). These signals originate from key accelerator systems in the linear accelerator and synchrotron such as the ion source, magnets, beam diagnostics, and radio frequency (RF) systems. Historical data for ISIS is available on the control system for many relevant channels. However, at present, to avoid disrupting the oscilloscope displays in the MCR, only an hourly image capture of the AWS waveforms is stored. This is largely inadequate for potential data-intensive applications such as anomaly detection, predictive maintenance, post-mortem analysis, or (semi-)automated machine setup, optimization, and control. To address this, a new digital data acquisition (DAQ) system is under development based on the principle of large channel count, simultaneous DAQ. This paper details the proposed architecture of the system and the results of initial prototyping, testing, and commissioning.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-MOPV020  
About • Received ※ 08 October 2021       Revised ※ 21 October 2021       Accepted ※ 16 December 2021       Issue date ※ 04 February 2022
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MOPV044 Lessons Learned Moving from Pharlap to Linux RT Linux, network, hardware, Windows 257
 
  • C. Charrondière, O.O. Andreassen, D. Sierra-Maíllo Martínez, J. Tagg, T. Zilliox
    CERN, Meyrin, Switzerland
 
  The start of the Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) facility at CERN in 2016 came with the need for a continuous image acquisition system. The international scientific collaboration responsible for this project requested low and high resolution acquisition at a capture rate of 10Hz and 1 Hz respectively. To match these requirements, GigE digital cameras were connected to a PXI system running PharLap, a real-time operating system, using dual port 1GB/s network cards. With new requirements for a faster acquisition with higher resolution, it was decided to add 10GB/s network cards and a Network Attached Storage (NAS) directly connected to the PXI system to avoid saturating the network. There was also a request to acquire high-resolution images on several cameras during a limited duration, typically 30 seconds, in a burst acquisition mode. To comply with these new requirements PharLap had to be abandoned and replaced with Linux RT. This paper describes the limitation of the PharLap system and the lessons learned during the transition to Linux RT. We will show the improvement of CPU stability and data throughput reached.  
poster icon Poster MOPV044 [0.525 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-MOPV044  
About • Received ※ 08 October 2021       Revised ※ 18 October 2021       Accepted ※ 20 November 2021       Issue date ※ 28 February 2022
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WEAL03 The Status of Fast Obit Feedback System of HEPS power-supply, hardware, feedback, controls 540
 
  • P. Zhu, Y.C. He, D.P. Jin, L. Zeng, Y.L. Zhang
    IHEP, Beijing, People’s Republic of China
  • D.Y. Wang
    DNSC, Dongguan, People’s Republic of China
  • L. Wang, X. Wu, Z.X. Xie, K. Xue
    IHEP CSNS, Guangdong Province, People’s Republic of China
 
  In order to further meet the needs of major national strategies and basic scientific research, High Energy Photon Source (HEPS) will be a high-performance fourth-generation synchrotron radiation source in Beijing, which will build more than 90 high-performance beamline stations. In order to ensure the high-performance operation of each beam line, the stability of the beam orbit near the light source output point is extremely important. As one of the key guarantees for the stability of the electron beam orbit, The FOFB system can suppress the beam orbit disturbance within a certain bandwidth to an acceptable range. This article introduces the currently progress of the FOFB system, including: the overall architecture scheme and key technical routes; the substation design following the ATCA mechanical architecture; the BPM data acquisition and high-speed transmission using high-performance Rocket I/O transmission Mechanism; embedded high-performance DSP for fast multiplication calculation to realize SVD, etc. The entire system design is progressing in an orderly manner.  
slides icon Slides WEAL03 [40.593 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-WEAL03  
About • Received ※ 19 October 2021       Revised ※ 22 October 2021       Accepted ※ 21 November 2021       Issue date ※ 23 February 2022
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WEPV033 Architecture of a Multi-Channel Data Streaming Device with an FPGA as a Coprocessor FPGA, controls, real-time, hardware 724
 
  • J.M. Nogiec, P. Thompson
    Fermilab, Batavia, Illinois, USA
 
  Funding: This work was supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics
The design of a data acquisition system often involves the integration of a Field Programmable Gate Array (FPGA) with analog front-end components to achieve precise timing and control. Reuse of these hardware systems can be difficult since they need to be tightly coupled to the communications interface and timing requirements of the specific ADC used. A hybrid design exploring the use of FPGA as a coprocessor to a traditional CPU in a dataflow architecture is presented. Reduction in the volume of data and gradual transitioning of data processing away from a hard real-time environment are both discussed. Chief design concerns, including data throughput and precise synchronization with external stimuli, are addressed. The discussion is illustrated by the implementation of a multi-channel digital integrator, a device based entirely on commercial off-the-shelf (COTS) equipment.
 
poster icon Poster WEPV033 [0.489 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-WEPV033  
About • Received ※ 09 October 2021       Accepted ※ 21 November 2021       Issue date ※ 08 December 2021  
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WEPV047 Supporting Flexible Runtime Control and Storage Ring Operation with the FAIR Settings Management System storage-ring, controls, operation, experiment 768
 
  • R. Mueller, J. Fitzek, H.C. Hüther, H. Liebermann, D. Ondreka, A. Schaller, A. Walter
    GSI, Darmstadt, Germany
 
  The FAIR Settings Management system has now been used productively for the GSI accelerator facility operating synchrotrons, storage rings, and transfer lines. The system’s core is being developed in a collaboration with CERN, and is based on CERN’s LHC Software Architecture (LSA) framework. At GSI, 2018 was dedicated to integrating the Beam Scheduling System BSS. Major implementations for storage rings were performed in 2019, while 2020 the main focus was on optimizing the performance of the overall control system. Integrating with the BSS allows us to configure the beam execution directly from the settings management system. Defining signals and conditions enables us to control the runtime behavior of the machine. The storage ring mode supports flexible operation with features allowing to pause the machine and execute in-cycle modifications, using concepts like breakpoints, repetitions, skipping, and manipulation. After providing these major new features and their successful productive use, the focus was shifted on optimizing their performance. The performance was analyzed and improved based on real-word scenarios defined by operations and machine experts.  
poster icon Poster WEPV047 [0.692 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-WEPV047  
About • Received ※ 09 October 2021       Accepted ※ 23 November 2021       Issue date ※ 22 December 2021  
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THAR03 Automated Scheduler Software Based on Metro UI Design for MACE Telescope software, controls, interface, experiment 814
 
  • M. Punna, S. Mohanan, P. Sridharan
    BARC, Trombay, Mumbai, India
  • P. Chandra, S.V. Godambe
    Bhabha Atomic Research Centre (BARC), Mumbai, India
 
  MACE Scheduler software generates automated schedule for the observations of preloaded high energy gamma-ray sources. The paper presents the design of MACE Scheduler software covering; source rise/set time calculation algorithms; auto and manual schedule generation; various data visualizations provided for schedule and source visibility reports. The schedule generation for a specific period is automated using a filter workflow. The sources are selected for scheduling by processing the sources through a series of customizable user defined filters; source visibility filter, priority filter, priority resolution filter. The workflow provides flexibility to apply any user tailored filter criteria that can be loaded dynamically using XML schema. Loosely coupled design allowed decoupling the astronomical timing calculation algorithms from schedule preparation workflow. Scheduler provides metro UI based interface for source filtering workflow generating auto-schedule, updating the generated schedules. Tree-map visualization helped to represent hierarchical multi-dimensional schedule information for the selected date range. WPF flat UI control templates focused more on content than chrome  
slides icon Slides THAR03 [0.501 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-THAR03  
About • Received ※ 09 October 2021       Revised ※ 19 October 2021       Accepted ※ 21 November 2021       Issue date ※ 03 March 2022
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THBR01 Renovation of the Trigger Distribution in CERN’s Open Analogue Signal Information System Using White Rabbit network, controls, hardware, interface 839
 
  • D. Lampridis, T. Gingold, A. Poscia, M.H. Serans, M.R. Shukla, T.P. da Silva
    CERN, Geneva, Switzerland
  • D. Michalik
    Aalborg University, Aalborg, Denmark
 
  The Open Analogue Signal Information System (OASIS) acts as a distributed oscilloscope system that acquires signals from devices across the CERN accelerator complex and displays them in a convenient, graphical way. Today, the OASIS installation counts over 500 multiplexed digitisers, capable of digitising more than 5000 analogue signals and offers a selection of more than 250 triggers for the acquisitions. These triggers are mostly generated at a single central place and are then distributed by means of a dedicated coaxial cable per digitiser, using a "star" topology. An upgrade is currently under way to renovate this trigger distribution system and migrate it to a White Rabbit (WR) based solution. In this new system, triggers are distributed in the form of Ethernet messages over a WR network, allowing for better scalability, higher time-stamping precision, trigger latency compensation and improved robustness. This paper discusses the new OASIS trigger distribution architecture, including hardware, drivers, front-end, server and application-tier software. It then provides results from preliminary tests in laboratory installations.  
slides icon Slides THBR01 [2.229 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-THBR01  
About • Received ※ 09 October 2021       Accepted ※ 21 December 2021       Issue date ※ 06 February 2022  
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THBR03 Prototype of White Rabbit Based Beam-Synchronous Timing Systems for SHINE network, FEL, electron, controls 853
 
  • P.X. Yu, Y.B. Yan
    SSRF, Shanghai, People’s Republic of China
  • G.H. Gong
    Tsinghua University, Beijing, People’s Republic of China
  • G. Gu, Z.Y. Jiang, L. Zhao
    USTC, Hefei, Anhui, People’s Republic of China
  • Y.M. Ye
    TUB, Beijing, People’s Republic of China
 
  Shanghai HIgh repetition rate XFEL aNd Extreme light facility (SHINE) is under construction. SHINE requires precise distribution and synchronization of the 1.003086MHz timing signals over a long distance of about 3.1 km. Two prototype systems were developed, both containing three functions: beam-synchronous trigger signal distribution, random-event trigger signal distribution and data exchange between nodes. The frequency of the beam-synchronous trigger signal can be divided according to the accelerator operation mode. Each output pulse can be configured for different fill modes. A prototype system was designed based on a customized clock frequency point (64.197530MHz). Another prototype system was designed based on the standard White Rabbit protocol. The DDS (Direct Digital Synthesis) and D flip-flops (DFFs) are adopted for RF signal transfer and pulse configuration. The details of the timing system design and test results will be reported in this paper.  
slides icon Slides THBR03 [3.344 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-THBR03  
About • Received ※ 11 October 2021       Revised ※ 19 October 2021       Accepted ※ 22 December 2021       Issue date ※ 10 February 2022
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THPV015 New Timing Sequencer Application in Python with Qt - Development Workflow and Lessons Learnt controls, GUI, interface, MMI 904
 
  • Zs. Kovari, G. Kruk
    CERN, Meyrin, Switzerland
 
  PyQt is a Python binding for the popular Qt framework for the development of desktop applications. By using PyQt one can leverage Qt’s aspects to implement modern, intuitive, and cross-platform applications while benefiting from Python’s flexibility. Recently, we successfully used PyQt 5 to renovate the Graphical User Interface (GUI) used to control the CERN accelerator timing system. The GUI application interfaces with a Java-based service behind the scenes. In this paper we introduce the generic architecture used for this project, our development workflow as well as the challenges and lessons we learned from using Python with Qt. We present our approach to delivering an operational application with a particular focus on testing, quality assurance, and continuous integration.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-THPV015  
About • Received ※ 07 October 2021       Accepted ※ 06 February 2022       Issue date ※ 11 March 2022  
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THPV022 MRF Timing System Design at SARAF controls, EPICS, operation, interface 912
 
  • A. Gaget
    CEA-IRFU, Gif-sur-Yvette, France
 
  CEA Saclay Irfu is in charge of an important part of the control system of the SARAF LINAC accelerator based at Soreq (Israel). This includes, among other, the control of the timing system (synchronization and timestamping). CEA has already installed and uses successfully the timing distribution with MRF on test benches for ESS or IPHI, so it has been decided to use the same technologies. The reference frequency will be distributed along the accelerator by a master oscillator Wenzel and the UTC time will be based on a Meridian II GPS, these 2 devices will be connected to the Event Master (EVM) card which is the main element of the timing system architecture. Through an optical fiber network, the MRF timing system allows to distribute downstream and upstream events with a µs propagation time. Currently, we are working on development in order to also use it for the machine protection system of the accelerator. In this paper, hardware, timing architecture, software developments and tests will be presented.  
poster icon Poster THPV022 [1.539 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-THPV022  
About • Received ※ 08 October 2021       Revised ※ 20 October 2021       Accepted ※ 23 January 2022       Issue date ※ 01 March 2022
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THPV025 A New Timing System for PETRA IV controls, FEL, hardware, synchrotron 916
 
  • T. Wilksen, A. Aghababyan, K. Brede, H.T. Duhme, M. Fenner, U. Hurdelbrink, H. Kay, H. Lippek, H. Schlarb
    DESY, Hamburg, Germany
 
  At DESY an upgrade of the PETRA III synchrotron light source towards a fourth-generation, low emittance machine PETRA IV is currently being actively pursued. The realization of this new machine implies a new design of the timing and synchronization system since requirements on beam quality and controls will significantly change from the existing implementation at PETRA III. The technical design phase of the PETRA IV project is in mid-phase and supposed to deliver a Technical Design Report by end of next year. The conceptual layout of the timing system will follow the successful MTCA.4-based approach as in use at the European XFEL. It will be enhanced to meet the requirements of a synchrotron facility and its booster and linac pre-accelerators. We present general concepts of the timing system, its integration into the control system as well as first specifications of the MTCA.4-based hardware components.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-THPV025  
About • Received ※ 10 October 2021       Revised ※ 21 October 2021       Accepted ※ 21 November 2021       Issue date ※ 11 January 2022
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THPV027 Application of the White Rabbit System at SuperKEKB distributed, operation, controls, linac 919
 
  • H. Kaji
    KEK, Ibaraki, Japan
  • Y. Iitsuka
    EJIT, Hitachi, Ibaraki, Japan
 
  We employ the White Rabbit system to satisfy the increasing requests from the SuperKEKB operations. The SuperKEKB-type slave node was developed based on the SPEC board and FMC-DIO card. The firmware was customized slightly to realize the SuperKEKB needs. The device/driver for EPICS was developed. The five slave nodes have been operated since the 2021 autumn run. The delivery of the beam permission signal from the central control building to the injector linac is taken care of by new slave nodes. The timing of the abort request signal and the trigger for the abort kicker magnet are recorded with the distributed TDC system. More slave nodes will be installed in the next year to enhance the role of the distributed TDC system.  
poster icon Poster THPV027 [1.186 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-THPV027  
About • Received ※ 10 October 2021       Revised ※ 25 October 2021       Accepted ※ 21 November 2021       Issue date ※ 08 January 2022
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THPV028 Analysis of AC Line Fluctuation for Timing System at KEK injection, linac, operation, positron 923
 
  • D. Wang
    Sokendai, Ibaraki, Japan
  • Y. Enomoto, K. Furukawa, H. Kaji, F. Miyahara, M. Sato, H. Sugimura
    KEK, Ibaraki, Japan
 
  The timing system controls the injection procedure of the accelerator by performing signal synchronization and trigger delivery to the devices all over the installations at KEK. The trigger signals is usually generated at the same phase of an AC power line to reduce the unwanted variation of the beam quality. This requirement originates from the power supply systems. However, the AC line synchronization conflicts with the bucket selection process of SuperKEKB low energy ring (LER) which stores the positron beam. The positron beam is firstly injected into a damping ring (DR) to lower the emittance before entering desired RF bucket in LER. A long bucket selection cycle for DR and LER makes it difficult to coincide with AC line every injection pulse. This trouble is solved by grouping several injection pulses into various of injection sequences and manipulating the length of sequences to adjust the AC line arrival timing. Therefore, the timing system is sensitive to drastically AC line fluctuation. The failure of timing system caused by strong AC line fluctuation and solutions are introduced in this work.  
poster icon Poster THPV028 [1.010 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-THPV028  
About • Received ※ 17 October 2021       Revised ※ 28 October 2021       Accepted ※ 21 November 2021       Issue date ※ 09 December 2021
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THPV029 Development of Timing Read-Back System for Stable Operation of J-PARC operation, LLRF, proton, controls 927
 
  • M. Yang
    Sokendai, Ibaraki, Japan
  • N. Kamikubota
    KEK, Ibaraki, Japan
  • N. Kikuzawa
    JAEA/J-PARC, Tokai-mura, Japan
  • K.C. Sato
    J-PARC, KEK & JAEA, Ibaraki-ken, Japan
  • Y. Tajima
    Kanto Information Service (KIS), Accelerator Group, Ibaraki, Japan
 
  Since 2006, the Japan Proton Accelerator Research Complex (J-PARC) timing system has been operated successfully. However, there were some unexpected trig-ger-failure events, typically missing trigger events, during the operation over 15 years. When a trigger-failure event occurred, it was often tough to find the one with the fault among many suspected modules. To solve the problem more easily, a unique device, triggered scaler, was devel-oped for reading back accelerator signals. The performance of the module has been evaluated in 2018. In 2021, we measured and observed an LLRF sig-nal as the first signal of the read-back system for beam operation. After firmware upgrades of the module, some customized timing read-back systems were developed, and successfully demonstrated as coping strategies for past trigger-failure events. In addition, a future plan to apply the read-back system to other facilities is discussed. More details are given in the paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-THPV029  
About • Received ※ 20 October 2021       Accepted ※ 21 November 2021       Issue date ※ 13 January 2022  
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THPV031 Upgrade of Timing System at HZDR ELBE Facility hardware, operation, controls, GUI 931
 
  • Ž. Oven, L. Krmpotić, U. Legat, U. Rojec
    Cosylab, Ljubljana, Slovenia
  • M. Justus, M. Kuntzsch, A. Schwarz, K. Zenker
    HZDR, Dresden, Germany
 
  The ELBE center for high power radiation sources is operating an electron linear accelerator to generate various secondary radiation like neutrons, positrons, intense THz and IR pulses and Bremsstrahlung. Timing system, that is currently in operation, has been modified and extended in the last two decades to enable new experiments. At the moment parts of this timing system are using obsolete components which makes maintenance a very challenging endeavour. To make ELBE timing system again a more homogenous system, that will allow for easier adaption to new and more complex trigger patterns, an upgrade based on Micro Research Finland (MRF) hardware platform is currently in progress. This upgrade will enable parallel operation of two electron sources and subsequent kickers to serve multiple end stations at the same time. Selected hardware enables low jitter emission of timing patterns and a long-term delay compensation of the distribution network. We are currently in the final phase of development and with plans for commissioning to be completed in 2022.  
poster icon Poster THPV031 [2.801 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-THPV031  
About • Received ※ 11 October 2021       Revised ※ 20 October 2021       Accepted ※ 21 November 2021       Issue date ※ 11 January 2022
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