Upgrade scenario for the RHIC collimation system

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The RHIC collimation system is used to reduce background levels in both STAR and PHENIX detectors. With a push for higher luminosity in the near future, it becomes critical to check if and how the level of performance of the collimators can be improved. The following reviews a proposal for additional collimators placed further downstream of the current system and designed to intercept the tertiary halo coming out of the IR8 insertion before it can reach the triplet quadrupoles in either STAR or PHENIX. Simulations have been peformed to quantify the efficiency of additional collimator jaws in RHIC. Each figure ... continued below

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G., Robert-Demolaize; Drees&#44 & A. January 19, 2012.

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The RHIC collimation system is used to reduce background levels in both STAR and PHENIX detectors. With a push for higher luminosity in the near future, it becomes critical to check if and how the level of performance of the collimators can be improved. The following reviews a proposal for additional collimators placed further downstream of the current system and designed to intercept the tertiary halo coming out of the IR8 insertion before it can reach the triplet quadrupoles in either STAR or PHENIX. Simulations have been peformed to quantify the efficiency of additional collimator jaws in RHIC. Each figure presented in this article clearly shows that the additional mask collimators provide the expected reduction in losses around the machine, and especially to the incoming triplet to the STAR experiment (IP6), for the Yellow beam as much as for the Blue beam. Looking at compiled statistics for all three working point cases studied, proton losses around the machine are reduced by roughly one order of magnitude: at most a factor 30 for magnet losses, and at most a factor 40 for losses in spaces between magnets.

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  • Report No.: BNL--96825-2012-IR
  • Grant Number: DE-AC02-98CH10886
  • Office of Scientific & Technical Information Report Number: 1043370
  • Archival Resource Key: ark:/67531/metadc835170

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 19, 2012

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • June 9, 2016, 4:11 p.m.

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G., Robert-Demolaize; Drees&#44 & A. Upgrade scenario for the RHIC collimation system, report, January 19, 2012; United States. (digital.library.unt.edu/ark:/67531/metadc835170/: accessed January 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.