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TUPDP021 Machine Protection System Upgrade for a New Timing System at ELBE timing, PLC, operation, controls 542
 
  • M. Justus, M. Kuntzsch, A. Schwarz, K. Zenker
    HZDR, Dresden, Germany
  • L. Krmpotić, U. Legat, Z. Oven, U. Rojec
    Cosylab, Ljubljana, Slovenia
 
  Running a CW electron accelerator as a user facility for more than two decades necessitates upgrades or even complete redesign of subsystems at some point. At ELBE, the outdated timing system needed a replacement due to obsolete components and functional limitations. Starting in 2019, with Cosylab as contractor and using hardware by Micro Research Finland, the new timing system has been developed and tested and is about to become operational. Besides the ability to generate a broader variety of beam patterns from single pulse mode to 26 MHz CW beams for the two electron sources, one of the benefits of the new system is improved machine safety. The ELBE control systems is mainly based on PLCs and industrial SCADA tools. This contribution depicts how the timing system implementation to the existing machine entailed extensions and modifications of the ELBE machine protection system, i.e. a new core MPS PLC, and how they are being realized.  
poster icon Poster TUPDP021 [0.731 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-TUPDP021  
About • Received ※ 04 October 2023 — Revised ※ 08 October 2023 — Accepted ※ 14 December 2023 — Issued ※ 16 December 2023
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TUPDP139 The Pointing Stabilization Algorithm for the Coherent Electron Cooling Laser Transport at RHIC laser, operation, electron, controls 913
 
  • L.K. Nguyen
    BNL, Upton, New York, USA
 
  Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy.
Coherent electron cooling (CeC) is a novel cooling technique being studied in the Relativistic Heavy Ion Collider (RHIC) as a candidate for strong hadron cooling in the Electron-Ion Collider (EIC). The electron beam used for cooling is generated by laser light illuminating a photocathode after that light has traveled approximately 40 m from the laser output. This propagation is facilitated by three independent optical tables that move relative to one another in response to changes in time of day, weather, and season. The alignment drifts induced by these environmental changes, if left uncorrected, eventually render the electron beam useless for cooling. They are therefore mitigated by an active "slow" pointing stabilization system found along the length of the transport, copied from the system that transversely stabilized the Low Energy RHIC electron Cooling (LEReC) laser beam during the 2020 and 2021 RHIC runs. However, the system-specific optical configuration and laser operating conditions of the CeC experiment required an adapted algorithm to address inadequate beam position data and achieve greater dynamic range. The resulting algorithm was successfully demonstrated during the 2022 run of the CeC experiment and will continue to stabilize the laser transport for the upcoming run. A summary of the algorithm is provided.
 
poster icon Poster TUPDP139 [2.129 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-TUPDP139  
About • Received ※ 05 October 2023 — Revised ※ 09 October 2023 — Accepted ※ 29 November 2023 — Issued ※ 08 December 2023
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