Run05 Proton Beam Polarization Measurements by pC-Polarimeter (ver. 1.1)

Nakagawa,I. ; Alekseev, I. ; Bazilevsky, A. ; Bravar, A. ; Bunce, G. ; Dhawan, S. ; Eyser, K.O. ; Gill, R. ; Haeberli, W. ; Huang, H. ; Makdisi, Y. ; Nass, A. ; Okada, H. ; Stephenson, E. ; Svirida, D.N. ; Wise, T. ; Wood, J. ; Yip, K. ; Zelenski, A.

关键词: ACCURACY;    ATOMIC BEAM SOURCES;    CARBON;    FEEDBACK;    HEAVY IONS;    HYDROGEN;    POLARIMETERS;    POLARIZATION;    PROTON BEAMS;    STABILITY;   

DOI  :  10.2172/939964
RP-ID  :  BNL--81577-2008-IR
PID  :  OSTI ID: 939964
Others  :  Other: KB0202011
Others  :  TRN: US200823%%732

学科分类：再生能源与代替技术

美国|英语

来源: SciTech Connect

【 摘 要 】

The polarization of the proton beams [1, 2] at the Relativistic Heavy Ion Collider (RHIC)[3] RHIC ring. The H-Jet polarimeter is located at the collision point allowing measurements of absolute normalization is provided by the hydrogen polarimeter, which measures over 1 {approx} 2 another measurement rather than measuring the absolute polarization. both beams. Two identical pC-polarimeters are equipped in the yellow and blue rings, where carbon ribbon target, providing fast feedback to beam operations and experiments. The days to obtain {approx} 5% statistical uncertainty (in Run05). Thus, the operation of the carbon is measured using both an atomic beam source hydrogen gas jet (H-Jet)[4, 5] and proton-carbon polarimeters was focused on better control of relative stability between one measurement to statistical accuracy within 20 to 30 seconds using an ultra-thin (typically 6 {approx} 8 {micro}g/cm{sup 2}) the rings are separated. The pC-polarimeter measures relative polarization to a few percent.