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Schmüser, P.

  
Paper Title Page
WG512 Longitudinal Diagnostics with THz Radiation 48
 
  • H. Delsim-Hashemi, P. Schmüser
    Uni HH, Hamburg
  • O. Grimm, B. Schmidt
    DESY, Hamburg
  
  According to the FEL theory, the longitudinal charge distribution in an electron bunch has an important effect on lasing process. For FLASH at DESY, structures in the order of 10 μm play a crucial role in SASE production. The investigation of the electron bunch longitudinal charge distribution and its bunch to bunch changes is one of the most important issues for optimizing the operation of the machine and improving its stability. Single shot spectroscopic in the 10–200 μm regime is beyond the capability of existing spectroscopic diagnostic tools. This paper introduces a new diagnostics method based on fast spectrally resolved detection of coherent infrared radiation from electron bunches. Measurement results at FLASH with this spectrometer in both scanning mode and single shot mode are presented and discussed.  
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WG514 Electro-optical measurements of the longitudinal bunch shape at FLASH  
 
  • B. Steffen, E.-A. Knabbe, B. Schmidt
    DESY, Hamburg
  • G. Berden
    FOM Rijnhuizen, Nieuwegein
  • S. P. Jamison
    CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
  • P. J. Phillips
    UAD, Dundee
  • P. Schmüser
    Uni HH, Hamburg
  
  Latest results on spectral decoding and temporal decoding EO measurements of the longitudinal bunch shape at FLASH will be presented, showing sub-200 fs EO signals.  
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