JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Schoefer, V. AU - Aschenauer, E.C. AU - Bruno, D. AU - Drees, K.A. AU - Fischer, W. AU - Gardner, C.J. AU - Hock, K. AU - Huang, H. AU - Hulsart, R.L. AU - Liu, C. AU - Luo, Y. AU - Marneris, I. AU - Marr, G.J. AU - Marusic, A. AU - Mernick, K. AU - Michnoff, R.J. AU - Minty, M.G. AU - Morris, J. AU - Méot, F. AU - Poblaguev, A. AU - Ptitsyn, V. AU - Ranjbar, V.H. AU - Raparia, D. AU - Robert-Demolaize, G. AU - Sandberg, J. AU - Schmidke, W.B. AU - Severino, F. AU - Shrey, T.C. AU - Thieberger, P. AU - Tuozzolo, J.E. AU - Valette, M. AU - Yip, K. AU - Zaltsman, A. AU - Zelenski, A. AU - Zeno, K. ED - Zimmermann, Frank ED - Tanaka, Hitoshi ED - Sudmuang, Porntip ED - Klysubun, Prapong ED - Sunwong, Prapaiwan ED - Chanwattana, Thakonwat ED - Petit-Jean-Genaz, Christine ED - Schaa, Volker R.W. TI - RHIC Polarized Proton Operation in Run 22 J2 - Proc. of IPAC2022, Bangkok, Thailand, 12-17 June 2022 CY - Bangkok, Thailand T2 - International Particle Accelerator Conference T3 - 13 LA - english AB - The Relativistic Heavy Ion Collider (RHIC) Run 22 physics program consisted of collisions with vertically po- larized proton beams at a single collision point (the STAR detector). During initial startup of the collider, power out- ages damaged two of the coils in one of the RHIC helical dipole snake magnets used for polarization preservation in the Blue ring. That snake was reconfigured for use as a partial snake. We will outline some of the remediating mea- sures taken to maximize polarization transmission in this configuration. These measures included changing the col- liding beam energy from 255 GeV to 254.2 GeV to adjust the spin closed orbit at store and adjustment of the field in the other helical dipole in the Blue ring to improve injection spin matching. Later in the run, the primary motor gener- ator for the AGS (the injector to RHIC) failed and a lower voltage backup had to be used, resulting in a period of lower polarization. Other efforts include detailed measurement of the stable spin direction at store and the commissioning of a machine protection relay system to prevent spurious firing of the RHIC abort kickers. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1765 EP - 1767 KW - operation KW - polarization KW - proton KW - luminosity KW - dipole DA - 2022/07 PY - 2022 SN - 2673-5490 SN - 978-3-95450-227-1 DO - doi:10.18429/JACoW-IPAC2022-WEPOST031 UR - https://jacow.org/ipac2022/papers/wepost031.pdf ER -