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

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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 ... continued below

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Pages: (5 p)

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Barletta, W.A.; Calderon, M.O.; Wong, R. (Lawrence Livermore National Lab., CA (USA)) & Jenkins, T.M. (Stanford Linear Accelerator Center, Menlo Park, CA (USA)) May 7, 1991.

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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.

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Pages: (5 p)

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OSTI; NTIS; INIS; GPO Dep.

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  • 1991 Institute of Electrical and Electronics Engineers (IEEE) particle accelerator conference (PAC), San Francisco, CA (USA), 6-9 May 1991

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  • Other: DE91011968
  • Report No.: UCRL-JC-105595
  • Report No.: CONF-910505--37
  • Grant Number: W-7405-ENG-48
  • Grant Number: AC03-76SF00515
  • Office of Scientific & Technical Information Report Number: 5935206
  • Archival Resource Key: ark:/67531/metadc1101389

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Office of Scientific & Technical Information Technical Reports

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  • May 7, 1991

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  • Feb. 18, 2018, 3:59 p.m.

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  • March 2, 2018, 5:25 p.m.

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Barletta, W.A.; Calderon, M.O.; Wong, R. (Lawrence Livermore National Lab., CA (USA)) & Jenkins, T.M. (Stanford Linear Accelerator Center, Menlo Park, CA (USA)). Vacuum system of the high energy ring of an asymmetric B-factory based on PEP, article, May 7, 1991; United States. (digital.library.unt.edu/ark:/67531/metadc1101389/: accessed November 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.