Author: Kowina, P.
Paper Title Page
MOPME073 Measurement of Schottky-like Signals from Linac Bunched Hadron Beams for Momentum Spread Evaluation 649
 
  • P. Kowina, P. Forck, R. Singh
    GSI, Darmstadt, Germany
  • F. Caspers
    CERN, Geneva, Switzerland
  • R. Singh
    TEMF, TU Darmstadt, Darmstadt, Germany
 
  We present a novel method for the measurement of Linac beam parameters in the longitudinal phase space. The longitudinal momentum spread can be evaluated by means of Schottky type signal analysis of bunched beams. There is a close similarity between a repetitive Linac bunch train and a circulating beam with a single short batch in a large machine like the LHC. A dedicated longitudinal cavity pick-up was used in the Linac where resonance frequency and Q-value were carefully selected in order to get an optimum compromise between the unavoidable coherent signal and the desired incoherent part of the beam spectrum. A time domain gating similar to the 4.8 GHz LHC Schottky front-end is applied. As a cross-check of the validity of the interpretation in terms of momentum spread, the Linac beam is analyzed in the downstream synchrotron using standard Schottky methods. In principle, this approach can be understood as an extension of Schottky analysis for circular machines with a perfect “mixing” between subsequent bunch trains. This contribution describes the test set-up and discusses the results of the measurements with a heavy ion beam.  
 
THPWO011 Status of the SIS100 Heavy Ion Synchrotron Project at FAIR 3782
 
  • P.J. Spiller, U. Blell, O. Boine-Frankenheim, L.H.J. Bozyk, E.S. Fischer, E. Floch, F. Hagenbuck, F. Hehenberger, M. Kauschke, O.K. Kester, A. Klaus, H. Klingbeil, H.G. König, P. Kowina, J.P. Meier, P. Moritz, C. Mühle, C. Omet, D. Ondreka, N. Pyka, H. Ramakers, P. Schnizer, J. Stadlmann, K. Sugita, D. Theuerkauf, B. Walasek-Höhne, St. Wilfert
    GSI, Darmstadt, Germany
 
  SIS100 is a unique superconducting heavy ion synchrotron, optimized for the acceleration of intense beams of intermediate charge state heavy ions. The operation with such beams has required new synchrotron design features and new technical concepts aiming for minimized ionization beam loss and vacuum dynamics. SIS100 is a superconducting synchrotron because of the required vacuum conditions and pumping power to achieve stable XHV conditions at high intensity operation. The project and procurement status will be presented.