Author: Ehrlichmann, H.
Paper Title Page
THPMR020 Bunch Purity Measurements at PETRA III 3434
  • J. Keil, H. Ehrlichmann
    DESY, Hamburg, Germany
  Since 2010 the 6 GeV synchrotron light source PETRA III is in operation. With a horizontal emittance of 1.2 nm*rad, a coupling of typically 1% and a total beam current of 100 mA the machine provides extremely brilliant synchrotron radiation for the users. For time-resolved measurements a filling pattern with 40 equidistant bunches with equal charge is used. To measure parasitic bunches between the main bunches two beamlines are equipped with avalanche photodiodes (APD) and time to digital converters (TDC) electronics. Besides parasitic bunches originating from the pre-accelerators of PETRA III it has been observed that initially empty buckets following the main bunch are populated. Measurements of the effect will be discussed and compared with simulations.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR020  
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