CERN Accelerating science

Article
Report number arXiv:1410.4057
Title Beam-beam effects in BEPCII
Author(s) Zhang, Y. (Beijing, Inst. High Energy Phys.)
Publication 2014
Imprint 15 Oct 2014
Number of pages 5
Note Comments: 5 pages, contribution to the ICFA Mini-Workshop on Beam-Beam Effects in Hadron Colliders, CERN, Geneva, Switzerland, 18-22 Mar 2013
5 pages, contribution to the ICFA Mini-Workshop on Beam-Beam Effects in Hadron Colliders, CERN, Geneva, Switzerland, 18-22 Mar 2013
In: ICFA Mini-Workshop on Beam-Beam Effects in Hadron Colliders, pp.37-41
DOI 10.5170/CERN-2014-004.37
Subject category Accelerators and Storage Rings
Abstract We first introduce the design parameters of the Beijing Electron-Positron Collider II (BEPCII) and the simulation study of beam-beam effects during the design process of the machine. The main advances since 2007 are briefly introduced and reviewed. The longitudinal feedback system was installed to suppress the coupled bunch instability in January 2010. The horizontal tune decreased from 6.53 to 6.508 during the course of data taken in December, 2010. The saturation of the beam-beam parameter was found in 2011, and the vacuum chambers and magnets near the north crossing point were moved 15 cm in order to mitigate the long range beam-beam interaction. At the beginning of 2013, the beam-beam parameter achieved 0.04 with the new lower $\alpha_{p}$ lattice and the peak luminosity achieved 7 x 10$^{32}$ cm$^{-2}$ s$^{-1}$.
Copyright/License publication: © 2014-2025 CERN (License: CC-BY-4.0)



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 Record created 2014-10-17, last modified 2022-08-10


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