Polarized electrons at MIT-Bates

Journal Article · Thu Jan 01 04:00:00 EST 1998 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.55026· OSTI ID:638717

Farkhondeh, M; Barkhuff, D; Dodson, G; Tsentalovich, E; Yang, B; Zwart, T; Ihloff, E; Tschalaer, C ^[1]

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1. MIT-Bates Linear Accelerator Center, Middleton, Massachusetts 01949 (United States)

A description of the MIT-Bates polarized electron source will be presented. Improvements to the polarized injector in recent years, including implementation of a multiple gun system, have made delivery of pulsed polarized beams for medium energy experiments routine and trouble-free. The spin orientation from the source is controlled by a Wien filter which has the added benefit of sweeping backstreaming positive ions away from the photocathode surface. The present challenge for the Bates polarized source is an unprecedented set of requirements on the stability and quality of the beam for the SAMPLE parity violation experiment now in progress, including limits on the source lifetime and helicity correlated beam position differences. The current status of the source lifetime is discussed. Recent results in laser beam position differences are presented as is a description of the diagnostics implemented on the laser transport line for fast and accurate measurements of these differences. Finally, we will discuss the plans for using a mode-locked laser system to achieve the higher laser power necessary for the South Hall Ring. {copyright} {ital 1998 American Institute of Physics.}

• Research Organization: Massachusetts Institute of Technology
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76ER03069
• OSTI ID: 638717
• Report Number(s): CONF-9708176--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 421; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM PRODUCTION
ELECTRON BEAMS
ELECTRON SOURCES
ELECTRONS
LASERS
LINEAR ACCELERATORS
MILLI AMP BEAM CURRENTS
MIT BATES LINAC
PHOTOCATHODES
POLARIZED BEAMS
QUANTUM EFFICIENCY