Author: Hunziker, S.
Paper Title Page
WEPG52 Laser Arrival Time Measurement and Correction for the SwissFEL Lasers 763
  • M.C. Divall, C.P. Hauri, S. Hunziker, A. Romann, A. Trisorio
    PSI, Villigen PSI, Switzerland
  SwissFEL will ultimately produce sub-fs X-ray pulses. Both the photo-injector laser and the pump lasers used for the experimental end stations therefore have tight requirements for relative arrival time to the machine and the X-rays. The gun laser oscillator delivers excellent jitter performance at ~20fs integrated from 10Hz-10MHz. The Yb:CaF2 regenerative amplifier, with an over 1km total propagation path, calls for active control of the laser arrival time. This is achieved by balanced cross-correlation against the oscillator pulses and a translation stage before amplification. The experimental laser, based on Ti:sapphire laser technology will use a spectrally resolved cross-correlator to determine relative jitter between the optical reference and the laser, with fs resolution. To be able to perform fs resolution pump-probe measurements the laser has to be timed with the X-rays with <10fs accuracy. These systems will be integrated into the machine timing and complemented by electron bunch and X-ray timing tools. Here we present the overall concept and the first results obtained on the existing laser systems.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG52  
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