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TUPS06 Electron Gun with Variable Beam Profile for COSY Cooler electron, gun, simulation, cathode 99
 
  • A. V. Bubley, M. I. Bryzgunov, A. V. Ivanov, A. M. Kruchkov, V. V. Parkhomchuk, V. B. Reva
    BINP SB RAS, Novosibirsk
  Electron gun with variable beam profile is used on COSY 2 MeV cooler to optimize the cooling process. Further development of the gun is achieved with the help of the four-sector control electrode that provides some new features. Combined with BPMs it gives the possibility of the electron beam shape estimation. Application of the gun for stochastic cooling is also discussed in the article.  
 
TUPS15 The Stochastic Cooling System of HESR pick-up, impedance, accumulation, kicker 129
 
  • R. Stassen, H. Stockhorst
    FZJ, Jülich
  • T. Katayama
    GSI, Darmstadt
  • L. Thorndahl
    CERN, Geneva
  The HESR is the high energy storage ring (1.5-15 GeV/c) for antiprotons at the FAIR facility (Facility for Antiprotons and Ion Research) in Darmstadt (GSI). Stochastic cooling in the HESR is necessary not only during the experiments to fulfill the beam requirements, but also during the accumulation due to the postponed RESR. Extensive simulations and prototype measurements have been carried out to optimize the HESR stochastic cooling system with the new slot-ring couplers. The system design is now in the final construction phase for the mechanical tank layout and all active RF-components. First results of the optical notch-filter with automated frequency control and the 4-6 GHz slot-ring couplers will be presented.  
 
TUPS22 Deceleration of Carbon Ions at the Heavy Ion Storage Ring TSR ion, electron, injection, storage-ring 147
 
  • S. T. Artikova, K. Blaum, M. Grieser, J. Ullrich, A. Wolf
    MPI-K, Heidelberg
  In order to evaluate the beam quality obtained after deceleration of 12C6+ ions at the heavy ion storage ring TSR, it is important to consider the possible sources of beam heating. In our experiments at the TSR Heidelberg carbon ions are injected at an energy of 73.3 MeV and decelerated them to 9.7 MeV in a cycle that includes two steps where beam cooling are applied. In this contribution we discuss the influences of intrabeam scattering (IBS) and the heating mechanisms on circulating ions. We will present results on the deceleration efficiency, the scaling of IBS rates with the beam energy and intensity, and studies of the phase space distribution during deceleration.