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Title: Beam-beam observations in the Relativistic Heavy Ion Collider

Technical Report ·
DOI:https://doi.org/10.2172/1222607· OSTI ID:1222607
 [1];  [1];  [1]
  1. Brookhaven National Laboratory (BNL), Upton, NY (United States)

The Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory has been operating since 2000. Over the past decade, thanks to the continuously increased bunch intensity and reduced β*s at the interaction points, the maximum peak luminosity in the polarized proton operation has been increased by more than two orders of magnitude. In this article, we first present the beam-beam observations in the previous RHIC polarized proton runs. Then we analyze the mechanisms for the beam loss and emittance growth in the presence of beam-beam interaction. The operational challenges and limitations imposed by beam-beam interaction and their remedies are also presented. In the end, we briefly introduce head-on beam-beam compensation with electron lenses in RHIC.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
DOE Contract Number:
SC00112704
OSTI ID:
1222607
Report Number(s):
BNL-108394-2015-IR; R&D Project: KBCH139; 18031; KB0202011
Country of Publication:
United States
Language:
English

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