TY  - JOUR
AU  - Lorentz, B.
AU  - Gebel, R.
AU  - Lehrach, A.
AU  - Maier, R.
AU  - Prasuhn, D.
AU  - Stockhorst, H.
TI  - Status and future plans of polarized beams at COSY
JO  - Journal of physics / Conference Series
VL  - 295
SN  - 1742-6588
CY  - Bristol
PB  - IOP Publ.
M1  - PreJuSER-18877
PY  - 2011
N1  - Record converted from VDB: 12.11.2012
AB  - In this paper we report on the present status and future plans of polarized beams in the COSY synchrotron ring. COSY is a synchrotron ring in the momentum range from 295 to 3700 MeV/c. Polarized deuterons and protons are routinely delivered to exp eriments over the whole momentum range. No depolarization occurs during the acceleration of deuterons in COSY. For polarized protons many depolarizing resonances are crossed without polarization loss. At imperfection resonances, vertical steerer magnets a re used to increase the resonance strength, leading to a complete polarization reversal. At intrinsic resonances a fast tune jump quadrupole is used to quickly cross the resonances without loss of polarization. Typical proton polarizations are close to 0. 8 below 2.1 GeV/c and about 0.6 for higher momenta. During recent operation an induced depolarizing resonance was used for accurate determination of the relative momentum spread dp/p of the stored beam yielding an accuracy of better than 10(-')(4). For sp in filter studies of the PAX collaboration a low beta target section was installed in 2009 and was successfully put into operation early 2010. An upgrade of the EDDA polarimeter electronics and data acquisition system is underway to ensure continued avail ability of the polarimeter, which is essential for the polarized proton operation of COSY. In the near future it is planned to install a Siberian snake solenoid of 4.5 Tm to be able to provide in addition to vertically polarized protons, longitudinal pola rization as well. This solenoid will allow the preparation of a longitudinally polarized beam up to a kinetic energy of 500 MeV.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000297031400071
DO  - DOI:10.1088/1742-6596/295/1/012146
UR  - https://juser.fz-juelich.de/record/18877
ER  -