Physics of polarimetry at RHIC. Proceedings of RIKEN BNL Research Center workshop: Volume 10
The primary motive of the workshop is (1) to discuss the RHIC polarimeter using the elastic proton-carbon scattering at Coulomb-nuclear interference region (p-C CNI polarimeter) in detail and write a proposal for the test experiment at the AGS, (2) to discuss the related physics, (3) and to discuss other options for the RHIC polarimetry. About twenty people have participated in the workshop and discussed above items and worked for the proposal. The idea of the p-C CNI polarimeter was proposed last year as a simple, inexpensive and efficient polarimeter for RHIC. In order to establish this polarimeter, it has been decided to carry out a test experiment by using a polarized beam at the AGS. A draft of the proposal was made during the workshop. For the p-C CNI polarimeter, a telescope detector using both the micro-channel plate (MCP) and the SSD was proposed to detect low energy recoil carbon ions, based on the test measurements at IUCF and Kyoto, where the carbon ions as low as 200 keV were successfully detected. The kinetic energy of carbon ion is measured with the SSD, and the velocity is measured by TOF between the two detectors and between the accelerator rf pulse and the two detectors. Counting rates for the background and true events were estimated. With the proposed polarimeter, one can expect to measure the beam polarization at the AGS and RHIC at an accuracy of 10% within a reasonable time period. This detector system will be tested at Kyoto as soon as possible and installed in the AGS ring for the test measurement of A{sub N} during E880 which is scheduled early in the next year.
- Research Organization:
- Brookhaven National Lab., RIKEN BNL Research Center, Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 325751
- Report Number(s):
- BNL--65926; CONF-980880--PROC.
- Country of Publication:
- United States
- Language:
- English
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