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Title: Operation experience of p-Carbon polarimeter in RHIC

The spin physics program in Relativistic Heavy Ion Collider (RHIC) requires fast polarimeter to monitor the polarization evolution on the ramp and during stores. Over past decade, the polarimeter has evolved greatly to improve its performance. These include dual chamber design, monitoring camera, Si detector selection (and orientation), target quality control, and target frame modification. The preamp boards have been modified to deal with the high rate problem, too. The ultra thin carbon target lifetime is a concern. Simulations have been carried out on the target interaction with beam. Modification has also been done on the frame design. Extra caution has been put on RF shielding to deal with the pickup noises from the nearby stochastic cooling kickers. This paper summarizes the recent operation performance of this delicate device.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Inst. of Theoretical and Experimental Physics (ITEP), Moscow (Russian Federation)
Publication Date:
OSTI Identifier:
1183852
Report Number(s):
BNL--107425-2015-CP
R&D Project: KBCH139; 18031; KB0202011; TRN: US1500219
DOE Contract Number:
SC00112704
Resource Type:
Conference
Resource Relation:
Conference: 6th International Particle Accelerator Conference (IPAC’15), Richmond, VA (United States), 3-8 May 2015
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BROOKHAVEN RHIC; CARBON 12 TARGET; PROTON BEAMS; POLARIMETERS; OPERATION; DESIGN; MODIFICATIONS; MONITORS; PERFORMANCE; CAMERAS; TIME DEPENDENCE; INTERACTIONS; NOISE; SPIN ORIENTATION; SIMULATION RELATIVISTIC HEAVY ION COLLIDER