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Singer, H.S.

Paper Title Page
MOPCH085 Pickup Structures for the HESR Stochastic Cooling System 228
 
  • R. Stassen, P.B. Brittner, G. Schug, H.S. Singer
    FZJ, Jülich
 
  The design of the High-Energy Storage Ring (HESR) of the future International Facility for Antiproton and Ion Research (FAIR) at the GSI in Darmstadt includes electron and stochastic cooling. Simulations have shown that the bandwidth of a 2-4 GHz stochastic cooling system is sufficient to achieve the requested beam parameter at the internal target. New 2-4 GHz pickup structures have been developed and tested. First results of the low impedance, printed loop structures will be presented.  
MOPCH186 First Cool Down of the Juelich Accelerator Module Based on Superconducting Half-Wave Resonators 496
 
  • F.M. Esser, B. Laatsch, H.S. Singer, R. Stassen
    FZJ, Jülich
  • R. Eichhorn
    TU Darmstadt, Darmstadt
 
  In the context of upgrading the existing proton and deuteron accelerator facility COSY at the Forschungszentrum Juelich, an accelerator module based on superconducting half wave resonators is prototyped. Due to beam dynamics, the requirements of cavity operation and a top-loading design for mounting, the cryostat had to be designed very compact and with a separate vacuum system for beam and insulation vacuum. These restricted requirements lead to very short cold-warm transitions in beam port region and to an unconventional design regarding to the shape of the cryostat vessel. This paper will review the design constraints, gives an overview of the ancillary parts of the module (cavities, tuner, etc.) and will present the results of the first cool-down experiments. Furthermore the future work will be presented.