Instrumentation and diagnostics for PEP-II

Journal Article · Tue Dec 01 04:00:00 EST 1998 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.57044· OSTI ID:344454

Fisher, A S ^[1]

---

1. Stanford Linear Accelerator Center Stanford University MS 17, P.O. Box 4349, Stanford, California 94309 (United States)

PEP-II is a 2.2 km-circumference collider with a 2.1 A, 3.1 GeV positron ring (the low-energy ring) 1 m above a 1 A, 9 GeV electron ring (the high-energy ring); both rings are designed to allow an upgrade to 3 A. Since June 1997, we have had three runs totaling 14 weeks to commission the full HER, reaching a current of 0.75 A. Positrons were transported through the first 90 m of the LER in January 1998, with full-ring tests planned for the summer. This workshop provides a timely opportunity to review the design of the beam diagnostics and their performance, with an emphasis on what works, what doesn{close_quote}t, and what we{close_quote}re doing to improve it. This paper discusses: the synchrotron-light monitor, including both transverse imaging onto a CCD camera and longitudinal measurements with a streak camera; beam position monitors, with processors capable of 1024-turn records, FFTs, and phase-advance measurements; tune measurements with a spectrum analyzer, including software for peak tracking; measurements of both the total ring current and the charge in each bucket, for real-time control of the fill; and beam loss monitors using small Cherenkov detectors for measuring losses from both stored and injected beam. {copyright} {ital 1998 American Institute of Physics.}

• Research Organization: Lawrence Berkeley National Laboratory
• Sponsoring Organization: USDOE
• DOE Contract Number: AC03-76SF00098; AC03-76SF00515
• OSTI ID: 344454
• Report Number(s): CONF-980573--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 451; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
BEAM MONITORING
BEAM PROFILES
ELECTRON BEAMS
GEV RANGE 01-10
PEP STORAGE RINGS
POSITRON BEAMS
SYNCHROTRON RADIATION