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Erni, D.

Paper Title Page
THPP072 Single-Shot Electron Bunch Length Measurements Using a Spatial Auto-Correlation Interferometer 648
 
  • D. Suetterlin, V. Schlott, H. Sigg
    PSI, Villigen
  • D. Erni, H. Jäckel
    ETH, Zurich
  • A. Murk
    University of Berne, Institute of Applied Physics, Berne
  
 

The polarization dependent intensity distribution of coherent transition radiation (CTR) emission has been studied theoretically and experimentally at an optical beam port downstream the 100 MeV SLS pre-injector LINAC. Based on these analyses, a spatial interferometer using the vertically polarized lobes of CTR has been designed and installed at this location. While a proof of principle of this bunch length monitor was achieved by step-scan measurements with a Golay cell detector, the single shot capability has been demonstrated by electro-optical correlation of the spatial CTR interference pattern with the fairly long Nd:YAG laser pulses in a ZnTe crystal. In single-shot operation variations of the bunch length due to different settings of the LINACs bunching cavities have been observed.