Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2006-12-18
AIPConf.Proc.915:916-919,2007
Physics
Nuclear Physics
Nuclear Experiment
4 pages, 2 figures. to appear in the proceedings of the 17th International Spin Physics Symposium (SPIN 2006), Kyoto, Japan, 2
Scientific paper
10.1063/1.2750925
The Relativistic Heavy Ion Collider at Brookhaven National Laboratory provides polarized proton beams for the investigation of the nucleon spin structure. For polarimetry, carbon-proton and proton-proton scattering is used in the Coulomb nuclear interference region at small momentum transfer ($-t$). Fast polarization measurements of each beam are carried out with carbon fiber targets at several times during an accelerator store. A polarized hydrogen gas jet target is needed for absolute normalization over multiple stores, while the target polarization is constantly monitored in a Breit-Rabi polarimeter. In 2005, the jet polarimeter has been used with both RHIC beams. We present results from the jet polarimeter including a detailed analysis of background contributions to asymmetries and to the beam polarization.
Alekseev Igor'i.
Bravar Alessandro
Bunce Gerry
Dhawan Sidharth
Eyser Oleg K.
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