Keyword: cryomodule
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TUPHA205 Control in EPICS for Conditioning Test Stands for ESS ion, EPICS, controls, timing 934
 
  • A. Gaget, A. Gomes
    CEA/DRF/IRFU, Gif-sur-Yvette, France
  • Y. Lussignol
    CEA/DSM/IRFU, France
 
  CEA Irfu Saclay is involved as partner in the ESS accelerator construction through different work-packages: controls for several RF test stands, for cryomodule demonstrators, for the RFQ coupler test and for the conditioning around 120 couplers and the tests of 8 cryomodules. Due to the high number of components it is really crucial to automatize the conditioning. This paper describes how the control of these test stands was done using the ESS EPICS Environment and homemade EPICS modules. These custom modules were designed to be as generic as possible for reuse in future similar platforms and developments. They rely on the IOxOS FMC ADC3111 acquisition card, Beckhoff EtherCAT modules and the MRF timing system.  
poster icon Poster TUPHA205 [1.381 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUPHA205  
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THPHA001 CEA Irfu EPICS Environment for the SARAF-LINAC Project ion, controls, PLC, EPICS 1335
 
  • F. Gougnaud, Y. Lussignol
    CEA/DSM/IRFU, France
  • J.F. Denis, F. Gohier, T.J. Joannem
    CEA/IRFU, Gif-sur-Yvette, France
 
  Our Institute CEA Saclay Irfu was in charge of the EPICS based control system platform for the accelerator projects Spiral2 at Ganil in Normandy and IFMIF/LIPAc at JAEA/Rokkasho (Japan). Our 3-year collaboration with ESS[*] has given us the opportunity to use new COTS hardware. We have made our CEA Irfu control platform evolve by retaining relevant and evolutive ESS solutions. Currently, CEA Irfu is in charge of the design, construction and commissioning at SNRC of the project SARAF-LINAC[**] (MEBT and Super Conducting Linac) including its control. This paper will present our proposition of architecture for the SARAF Linac using the new CEA Irfu hardware and software platforms.
[*]Status of the European Spallation Source , T. Korhonen October 2014
[**]The SARAF-LINAC project status, N. Pichoff, IPAC'16, Busan, Korean (2016).
 
poster icon Poster THPHA001 [1.112 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THPHA001  
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THPHA146 LCLS-II Cryomodule and Cryogenic Distribution Control ion, controls, PLC, cryogenics 1729
 
  • K.J. Mattison, M. Boyes, C. Cyterski, D. Fairley, B. Lam
    SLAC, Menlo Park, California, USA
  • C. Hovater
    JLab, Newport News, Virginia, USA
  • J.A. Kaluzny, A. Martinez
    Fermilab, Batavia, Illinois, USA
 
  LCLS-II is a superconducting upgrade to the existing Linear Coherent Light Source at the SLAC National Accelerator Laboratory. Construction is underway with a planned continuous wave beam rate of up to 1 MHz. Two cryogenic plants provide helium to a distribution system, and 37 cryomodules with superconducting cavities will operate with Liquid helium at 2.2K. The cryomodules and distribution system is controlled with networked PLC's and EPICS as an integrated system that work in concert for controlling valves, pressure, flow, and temperature. Interlocks and critical process information is communicated with the Low Level Radio Frequency, vacuum, and magnet systems. Engaging the controls community proved vital in advancing the controls architecture from a conventional design to a centralized, reliable, and cost-effective distributed platform.  
poster icon Poster THPHA146 [1.330 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THPHA146  
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THSH202 Design and Implementation of the LLRF System for LCLS-II ion, cavity, controls, LLRF 1969
 
  • C. Serrano, K.S. Campbell, L.R. Doolittle, Q. Du, G. Huang, J.A. Jones, V.K. Vytla
    LBNL, Berkeley, California, USA
  • S. Babel, A.L. Benwell, M. Boyes, G.W. Brown, D. Cha, J.H. De Long, J.A. Diaz Cruz, D.B. Greg, B. Hong, R.S. Kelly, A.L. McCollough, M. Petree, A. Ratti, C.H. Rivetta
    SLAC, Menlo Park, California, USA
  • R. Bachimanchi, C. Hovater, D.J. Seidman
    JLab, Newport News, Virginia, USA
  • B.E. Chase, E. Cullerton, J. Einstein, J.P. Holzbauer, D.W. Klepec, Y.M. Pischalnikov, W. Schappert
    Fermilab, Batavia, Illinois, USA
 
  Funding: This work was supported by the LCLS-II Project and the U.S. Department of Energy, Contract n. DE-AC02-76SF00515
The SLAC National Accelerator Laboratory is building LCLS-II, a new 4 GeV CW superconducting (SCRF) linac as a major upgrade of the existing LCLS. The SCRF linac consists of 35 ILC style cryomodules (eight cavities each) for a total of 280 cavities. Expected cavity gradients are 16 MV/m with a loaded QL of ~ 4 x 107. Each individual RF cavity will be powered by one 3.8 kW solid state amplifier. To ensure optimum field stability a single source single cavity control system has been chosen. It consists of a precision four channel cavity receiver and two RF stations (Forward, Reflected and Drive signals) each controlling two cavities. In order to regulate the resonant frequency variations of the cavities due to He pressure, the tuning of each cavity is controlled by a Piezo actuator and a slow stepper motor. In addition the system (LLRF-amplifier-cavity) was modeled and cavity microphonic testing has started. This paper will describe the main system elements as well as test results on LCLS-II cryomodules.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THSH202  
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