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Title: Vacuum system of the high energy ring of an asymmetric B-factory based on PEP

The multi-ampere currents required for high luminosity operation of an asymmetric B factory leads to extremely stressing requirements on a vacuum system suitable for maintaining long beam-gas lifetimes and acceptable background levels in the detector. We present the design for a Cu alloy vacuum chamber and its associated pumping system for the 9 GeV electron storage ring of the proposed B factory based on PEP. The excellent thermal and photo-desorption properties of Cu allows handling the high proton flux in a conventional, single chamber design with distributed ion pumps. The x-ray opacity of the Cu is sufficiently high that no additional lead shielding is necessary to protect the dipoles from the intense synchrotron radiation generated by the beam. The design allows chamber commissioning in <500 hr of operation. 5 refs., 3 figs., 2 tabs.
Authors:
; ;  [1] ;  [2]
  1. (Lawrence Livermore National Lab., CA (USA))
  2. (Stanford Linear Accelerator Center, Menlo Park, CA (USA))
Publication Date:
OSTI Identifier:
5935206
Report Number(s):
UCRL-JC-105595; CONF-910505--37
ON: DE91011968
DOE Contract Number:
W-7405-ENG-48; AC03-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: 1991 Institute of Electrical and Electronics Engineers (IEEE) particle accelerator conference (PAC), San Francisco, CA (USA), 6-9 May 1991
Research Org:
Lawrence Livermore National Lab., CA (USA); Stanford Linear Accelerator Center, Menlo Park, CA (USA)
Sponsoring Org:
DOE; USDOE, Washington, DC (USA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; STORAGE RINGS; VACUUM SYSTEMS; DESIGN; ABSORPTION; BEAUTY PARTICLES; COPPER; PEP STORAGE RINGS; PUMPING; SYNCHROTRON RADIATION; BREMSSTRAHLUNG; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ELEMENTS; METALS; RADIATIONS; TRANSITION ELEMENTS 430400* -- Particle Accelerators-- Storage Rings; 430303 -- Particle Accelerators-- Experimental Facilities & Equipment