PoS - Proceedings of Science
Volume 433 - 19th Workshop on Polarized Sources, Targets and Polarimetry (PSTP2022) - Session 13
HJET performance in RHIC Run 22
G. Atoian*, A. Poblaguev and A. Zelenski
Full text: pdf
Pre-published on: March 15, 2023
Published on: August 04, 2023
In Run 22, the polarized proton beams were resumed at RHIC after four years of heavy ion beam operation. Here we compare HJET performance in the 255 GeV proton Runs 17 and 22. It was found that analyzing power calibration obtained in Run 17 can be used in Run 22 absolute proton beam polarization measurements. Spin asymmetries measured in Runs 17 and 22 were found to be well consistent within the evaluated systematic uncertainty of $\sigma^\rm{syst}a/a\!\lesssim\!0.5\%$.
DOI: https://doi.org/10.22323/1.433.0034
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