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Nagaitsev, S.

Paper Title Page
TUP013 Using Higher Order Modes in Superconducting Accelerating Cavities for Beam Monitoring 271
 
  • N. Baboi, O. Hensler
    DESY, Hamburg
  • N. E. Eddy, S. Nagaitsev
    Fermilab, Batavia, Illinois
  • J. C. Frisch, S. Molloy, M. C. Ross
    SLAC, Menlo Park, California
  • O. Napoly, R. Paparella
    CEA, Gif-sur-Yvette
  
  Dipole modes have been shown to be successful diagnostics for the beam position in superconducting accelerating cavities at the VUV Free Electron Laser (FEL) facility at DESY. By help of downmixing electronics the signals from the two higher order mode couplers mounted on each cavity are monitored. Due to the non-symmetric placement of the couplers and the overlapping of the two polarizations of the modes, the calibration is somewhat more complicated than in standard position monitors. A method based on the model independent analysis has been developed. The calibration measurements made at the VUV FEL will be presented.