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

Conference · Tue May 07 04:00:00 EDT 1991

OSTI ID:5935206

Barletta, W A; Calderon, M O; Wong, R ^[1]; Jenkins, T M ^[2]

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1. Lawrence Livermore National Lab., CA (USA)
2. Stanford Linear Accelerator Center, Menlo Park, CA (USA)

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.

• Research Organization: Lawrence Livermore National Lab., CA (USA); Stanford Linear Accelerator Center, Menlo Park, CA (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: W-7405-ENG-48; AC03-76SF00515
• OSTI ID: 5935206
• Report Number(s): UCRL-JC-105595; CONF-910505--37; ON: DE91011968
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303 -- Particle Accelerators-- Experimental Facilities &amp; Equipment
430400* -- Particle Accelerators-- Storage Rings
ABSORPTION
BEAUTY PARTICLES
BREMSSTRAHLUNG
COPPER
DESIGN
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
METALS
PEP STORAGE RINGS
PUMPING
RADIATIONS
STORAGE RINGS
SYNCHROTRON RADIATION
TRANSITION ELEMENTS
VACUUM SYSTEMS