Author: Gasowski, B.     [Gąsowski, B.]
Paper Title Page
WEPRI116 Master Oscillator for the European XFEL 2771
 
  • L.Z. Zembala, K. Czuba, B. Gąsowski, D. Sikora
    Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland
  • J. Branlard, H. Schlarb, H.C. Weddig
    DESY, Hamburg, Germany
 
  The reference signal outage causes breakdown of the synchronisation in the entire accelerator, which could result in a multi-day break in the operation. Therefore, the Master Oscillator (MO) for the European XFEL has to be redundant, in order to achieve extremely high reliability. The redundancy concept, which provides no interruption in the reference signal, requires phase coherence, fast RF switching and sustaining the RF power with a high-Q filter. These features allow to keep possible signal transitions smooth. Furthermore, the MO has to generate a 1.3 GHz signal of exceptionally good phase noise performance – jitter < 35 fs RMS integrated from 10 Hz to1 MHz. One of the problems in the way are vibrations, which have to be properly isolated to avoid microphonics effects in oscillators. The proposed MO architecture and connection with the RF distribution system is described. A basic prototype is tested and results are presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRI116  
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