Author: Probst, M.
Paper Title Page
THP056 The SwissFEL C-band RF Pulse Compressor: Manufacturing and Proof of Precision by RF Measurements 859
  • U. Ellenberger, H. Blumer, M. Heusser, M. Kleeb, L. Paly, M. Probst, T. Stapf
    Paul Scherrer Institute, Villigen PSI, Switzerland
  • M. Bopp, A. Citterio, R. Zennaro
    PSI, Villigen PSI, Switzerland
  A pulse compressor is required to compress the RF power distributed to the four accelerating structures of a single C-band (5712 GHz) module of the SwissFEL. The pulse compressor is of the barrel open cavity (BOC) type. A total of 26 BOC devices are necessary to operate the linear accelerator (26 modules or 104 C-band structures) of SwissFEL X-ray laser. The C-band BOC combines the advantages of compactness and large RF efficiency i.e. large compression factor. Key features of the BOC are described and how they have been implemented in the manufacturing and tuning processes. RF measurements of the BOC are presented to account for the mechanical precision reached by manufacturing. Up to August 2014 about 6 BOCs have been manufactured in-house and one has been high power tested in a RF test stand to simulate the operation in SwissFEL.