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

  • X. Gu
  • , W. Fischer
  • , Z. Altinbas
  • , M. Anerella
  • , E. Bajon
  • , M. Bannon
  • , D. Bruno
  • , M. Costanzo
  • , A. Drees
  • , D. M. Gassner
  • , R. C. Gupta
  • , J. Hock
  • , M. Harvey
  • , A. K. Jain
  • , J. P. Jamilkowski
  • , P. Kankiya
  • , R. Lambiase
  • , C. Liu
  • , Y. Luo
  • , M. Mapes
  • A. Marusic, C. Mi, R. Michnoff, T. A. Miller, M. Minty, S. Nemesure, W. Ng, D. Phillips, A. I. Pikin, P. J. Rosas, G. Robert-Demolaize, T. Samms, J. Sandberg, V. Schoefer, T. C. Shrey, Y. Tan, R. Than, C. Theisen, P. Thieberger, J. Tuozzolo, P. Wanderer, W. Zhang, S. M. White

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Two electron lenses (e-lenses) have been in operation during the 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 detail the design considerations and verification of the electron beam parameters of the RHIC e-lenses. Longitudinal and transverse alignments with ion beams and the transverse beam transfer function measurement with head-on electron-proton beam are presented.

Original languageEnglish
Article number023501
JournalPhysical Review Accelerators and Beams
Volume20
Issue number2
DOIs
StatePublished - Feb 17 2017
Externally publishedYes

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