Author: Einstein, J.
Paper Title Page
TUPOA18 Low Level RF Control for the PIP-II Injector Test RFQ 323
 
  • J.P. Edelen, B.E. Chase, E. Cullerton, J. Einstein, P. Varghese
    Fermilab, Batavia, Illinois, USA
  
  The PIP-II injector test radio frequency quadrupole (RFQ) arrived at Fermilab in the fall of 2015. The RFQ is a 162.5MHz H− accelerator with a nominal drive power of 100kW, which produces a bunched H− beam at 2.1MeV. In this paper we discuss commissioning, operational performance, and improvements to the low level RF (LLRF) control system for the RFQ. We begin by describing the general system configuration and initial simulation results. We will then highlight temperature related issues in the high power RF system, which necessitate active control over the phase balance of the two amplifiers. Finally we demonstrate performance of the RF feedback and feed-forward compensation needed to meet specification during a 20-microsecond beam pulse.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOA18  
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TUPOA52 Updates to the Low-Level RF Architecture for Fermilab 394
 
  • J. Einstein, B.E. Chase, E. Cullerton, P. Varghese
    Fermilab, Batavia, Illinois, USA
  • S. Biedron, S.V. Milton
    CSU, Fort Collins, Colorado, USA
  • D. Sharma
    RRCAT, Indore (M.P.), India
  
  Fermilab has teamed with Colorado State University on several projects in LLRF controls and architecture. These projects include new LLRF hardware, updated controls techniques, and new system architectures. Here we present a summary of our work to date.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOA52  
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FRA2IO02 High Precision RF Control for the LCLS-II 1292
 
  • G. Huang, K. Campbell, L.R. Doolittle, J.A. Jones, C. Serrano, V.K. Vytla
    LBNL, Berkeley, California, USA
  • S. Babel, M. Boyes, G.W. Brown, D. Cha, B. Hong, 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, Q. Du, J. Einstein, D.W. Klepec
    Fermilab, Batavia, Illinois, USA
  
  Funding: Work supported by the LCLS-II Project and the U.S. Department of Energy, Contract DE-AC02-76SF00515
The LCLS-II is a CW superconducting linac under construction to drive an X-ray FEL. The energy and timing stability requirements of the FEL drive the need for very high precision RF control. This paper summarize the design considerations and early demonstration of the performance of the components and system we developed. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-FRA2IO02  
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