Diagnostics development for the PEP-II B factory
- Stanford Linear Accelerator Center, Stanford University, Post Office Box 4349, Stanford, California 94309 (United States)
- Lawrence Berkeley National Laboratory, University of California, 1 Cyclotron Road, Berkeley, California 94720 (United States)
PEP-II is a 2.2-km collider with a 2.1-A, 3.1-GeV positron ring 1 m above a 1-A, 9-GeV electron ring; both are designed for a maximum of 3 A. Several diagnostics are now in preparation for commissioning the rings. The beam size and pulse duration are measured using visible synchrotron radiation from arc dipoles. Grazing-incidence, water-cooled mirrors that must withstand up to 200 W/cm extract the light. The sum signal from a set of four pickup buttons, normalized to a DC current transformer{close_quote}s measurement of the ring current, is processed to measure the charge in each bunch. This enables us to fill 1658 of the 3492 buckets per ring to a charge that must be equal within {plus_minus}2{percent}. For diagnostics and machine protection, 100 photomultiplier-based Cherenkov detectors measure the beam-loss distribution. {copyright} {ital 1997 American Institute of Physics.}
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 526805
- Report Number(s):
- CONF-9605173-; ISSN 0094-243X; TRN: 97:016885
- Journal Information:
- AIP Conference Proceedings, Vol. 390, Issue 1; Conference: 7. workshop on beam instrumentation, Argonne, IL (United States), 6-9 May 1996; Other Information: PBD: Jan 1997
- Country of Publication:
- United States
- Language:
- English
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