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Smith, S.

Paper Title Page
WEPPH042 Bunch Length Monitors for Feedback in teh LClS Injector  
 
  • R. Akre, T. Borden, M. Cecere, P. Emma, R. Fuller, K. D. Kotturi, P. Krejcik, J. Langton, H. Loos, D. J. McCormick, T. M. Montagne, S. Peng, H. Shoaee, S. Smith, J. Wu, J. C. Frisch
    SLAC, Menlo Park, California
 
  The 250MeV Linac Coherent Light Source injector RF system requires feedback to meet its stability requirements. This feedback uses the beam energy and bunch length after the first bunch compressor to control the phase and amplitude of the preceding accelerator section. It is desirable that the energy and bunch length signals be available non-invasively, at the full 120Hz beam rate of the machine. The beam transverse position in the bunch compressor chicane provides a direct measure of the energy. Relative changes in bunch length are measured using coherent millimeter wave radiation sampled at different wavelengths.