Polarization Measurements of RHIC-pp RUN05 Using CNI pC-Polarimeter

The 2005 run (RUN05) was the first extended operation of the polarized RHIC‐pp program. Throughout 3 months of running, polarization measurements were regularly executed every 2 ∼ 3 hours during the beams at storage energy 100GeV using RHIC pC‐polarimeters. These measurements were performed under different beam conditions, i.e., intensity, emittance, backgrounds, cumulated radiation damage on detectors and so on. The stability of measurements under these various conditions is a major concern and is discussed in detail.