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Straumann, T.

Paper Title Page
FRPMN111 Design and Performance of the LCLS Cavity BPM System 4366
 
  • R. M. Lill, L. H. Morrison, W. E. Norum, N. Sereno, G. J. Waldschmidt, D. R. Walters
    ANL, Argonne, Illinois
  • S. Smith, T. Straumann
    SLAC, Menlo Park, California
  
  Funding: Work supported by U. S. Department of Energy under Contract Nos. DE-AC02-06CH11357 and DE-AC03-76SF00515

In this paper we present the design of the beam position monitor (BPM) system for the LCLS undulator, which features a high resolution X-band cavity BPM. Each BPM has a TM010 monopole reference cavity and a TM110 dipole cavity designed to operate at a center frequency of 11.384 GHz. The signal processing electronics features a low-noise single-stage three-channel heterodyne receiver that has selectable gain and a phase locking local oscillator. We will discuss the system specifications, design, and prototype test results.