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Korostelev, M.

Paper Title Page
MPPE044 Damping Wiggler Study at KEK-ATF 2809
 
  • T. Naito, H. Hayano, Y. Honda, K. Kubo, M. Kuriki, S. Kuroda, T. Muto, N. Terunuma, J.U. Urakawa
    KEK, Ibaraki
  • M. Korostelev, F. Zimmermann
    CERN, Geneva
  • N. Nakamura, H. Sakai
    ISSP/SRL, Chiba
  • M.C. Ross
    SLAC, Menlo Park, California
 
  The effects by damping wiggler magnets have been studied at KEK-ATF. The damping ring of the KEK-ATF is a 1.3 GeV storage ring capable of producing ultra-low emittance electron beams. It is significant issue to realize fast damping in the damping ring. The tuning method with 4 sets of wiggler was investigated for the ultra-low emittance beam. The performance on the beam quality, which is related to the transverse (x and y) and the longitudinal (z and dp/p), has been measured by the SR monitor, the laser wire, the streak camera and the energy spread monitor at the extraction line. We report on the operation condition and the measurement results.  
RPPP007 CLIC Damping Ring Optics Design Studies 1060
 
  • M. Korostelev, F. Zimmermann
    CERN, Geneva
 
  In this paper the nonlinearities induced by the short period NbFeB permanent wiggler optimized for the CLIC damping ring and their influence to the beam dynamics are studied.  
RPPP008 The Short Circumference Damping Ring Design for the ILC 1126
 
  • M. Korostelev, F. Zimmermann
    CERN, Geneva
  • K. Kubo, M. Kuriki, S. Kuroda, T. Naito, J.U. Urakawa
    KEK, Ibaraki
  • M.C. Ross
    SLAC, Menlo Park, California
 
  The ILC damping ring tentative design is driven by the operational scenario of the main linac, the beam-dynamics demand of producing a stable and high-quality beam, the injection/extraction scheme and the kicker performance. In this paper, a short circumference damping ring design based on TME cells is described. The ring accommodates injection kickers which provide a flat top of 280 nsec and a 60 nsec rise and fall time and very fast strip-line kickers for beam extraction with a 2 nsec rise and fall time for 3-MHz operation. The potential impact of collective effects and the possible degradation of the dynamic aperture by nonlinear-wiggler fields are estimated.  
RPPP012 Collective Effects in the CLIC Damping Rings 1312
 
  • F. Zimmermann, M. Korostelev, D. Schulte
    CERN, Geneva
  • T.A. Agoh, K. Yokoya
    KEK, Ibaraki
 
  The small emittance, short bunch length, and high current in the CLIC damping ring could give rise to collective effects which degrade the quality of the extracted beam. In this paper, we survey a number of possible instabilities and estimate their impact on the ring performance. The effects considered include fast beam-ion instability, coherent synchrotron radiation, and electron cloud, in addition to conventional single and multi-bunch instabilities.