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@INPROCEEDINGS{Lehrach:838061,
      author       = {Lehrach, Andreas and Bechstedt, Ulf and Dietrich, Jürgen
                      and Gebel, Ralf and Lorentz, Bernd and Maier, Rudolf and
                      Prasuhn, Dieter and Schnase, Alexander and Schneider,
                      Herbert and Stassen, Rolf and Stockhorst, Hans and Tölle,
                      Raimund},
      title        = {{O}vercoming {D}epolarizing {R}esonances at {COSY}},
      volume       = {667},
      publisher    = {AIP},
      reportid     = {FZJ-2017-06799},
      pages        = {30-39},
      year         = {2003},
      comment      = {AIP Conference Proceedings},
      booktitle     = {AIP Conference Proceedings},
      abstract     = {At the cooler synchrotron COSY, polarized protons and
                      deuterons are accelerated up to 3.65 GeV/c. In a
                      strong‐focusing synchrotron like COSY, imperfection and
                      intrinsic resonances cause polarization losses during
                      acceleration. During the acceleration of polarized protons,
                      five imperfection resonances are crossed. The existing
                      magnet system of COSY allows to overcome all imperfection
                      resonances by exciting adiabatic spin flips without
                      polarization losses. The number of intrinsic resonances
                      depends on the superperiodicity of the lattice. A
                      tune‐jump system consisting of two fast quadrupoles has
                      been developed to handle intrinsic resonances in COSY.
                      Vertically polarized proton beams with more than $75\%$
                      polarization have been delivered in recent years to internal
                      as well as to external experiment areas at different momenta
                      up to the maximum momentum of COSY. For the acceleration of
                      polarized deuterons, additional correction provisions are
                      not necessary to preserve polarization during acceleration.
                      In this paper the techniques to overcome depolarizing
                      resonances and the status of the polarized beam acceleration
                      at COSY are discussed.},
      month         = {Nov},
      date          = {2002-11-06},
      organization  = {INCREASING THE AGS POLARIZATION, Ann
                       Arbor (Michigan (USA)), 6 Nov 2002 - 9
                       Nov 2002},
      cin          = {IKP-4},
      cid          = {I:(DE-Juel1)IKP-4-20111104},
      pnm          = {631 - Accelerator R $\&$ D (POF3-631)},
      pid          = {G:(DE-HGF)POF3-631},
      typ          = {PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
      doi          = {10.1063/1.1586674},
      url          = {https://juser.fz-juelich.de/record/838061},
}