TY  - CONF
AU  - Lehrach, Andreas
AU  - Bechstedt, Ulf
AU  - Dietrich, Jürgen
AU  - Gebel, Ralf
AU  - Lorentz, Bernd
AU  - Maier, Rudolf
AU  - Prasuhn, Dieter
AU  - Schnase, Alexander
AU  - Schneider, Herbert
AU  - Stassen, Rolf
AU  - Stockhorst, Hans
AU  - Tölle, Raimund
TI  - Overcoming Depolarizing Resonances at COSY
VL  - 667
PB  - AIP
M1  - FZJ-2017-06799
SP  - 30-39
PY  - 2003
AB  - 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.
T2  - INCREASING THE AGS POLARIZATION
CY  - 6 Nov 2002 - 9 Nov 2002, Ann Arbor (Michigan (USA))
Y2  - 6 Nov 2002 - 9 Nov 2002
M2  - Ann Arbor, Michigan (USA)
LB  - PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
DO  - DOI:10.1063/1.1586674
UR  - https://juser.fz-juelich.de/record/838061
ER  -