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Title: Electron lenses for head-on beam-beam compensation in RHIC

Two electron lenses (e-lenses) have been in operation during 2015 RHIC physics run as part of a head-on beam-beam compensation scheme. While the RHIC lattice was chosen to reduce the beam-beam induced resonance driving terms, the electron lenses reduced the beam-beam induced tune spread. This has been demonstrated for the first time. The beam-beam compensation scheme allows for higher beam-beam parameters and therefore higher intensities and luminosity. In this paper, we detailed the design considerations and verification of the electron beam parameters of the RHIC e-lenses. Lastly, longitudinal and transverse alignments with ion beams and the transverse beam transfer function (BTF) measurement with head-on electron-proton beam are presented.
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  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. European Synchrotron Radiation Facility (ESRF), Grenoble (France)
Publication Date:
Report Number(s):
BNL-113497-2017-JA; BNL-114475-2017-JA
Journal ID: ISSN 2469-9888; PRABCJ; R&D Project: KBCH139; 18064; KB0202011; TRN: US1700705
Grant/Contract Number:
SC0012704; AC02- 98CH10886; AC02-98CH10886
Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams (Online)
Additional Journal Information:
Journal Name: Physical Review Accelerators and Beams (Online); Journal Volume: 20; Journal Issue: 2; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS
OSTI Identifier:
1344185
Alternate Identifier(s):
OSTI ID: 1344226; OSTI ID: 1408720