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Title: Measurement of Electron Clouds in Large Accelerators by Microwave Dispersion

Clouds of low energy electrons in the vacuum beam pipes of accelerators of positively charged particle beams present a serious limitation for operation at high currents. Furthermore, it is difficult to probe their density over substantial lengths of the beam pipe. We have developed a novel technique to directly measure the electron cloud density via the phase shift induced in a TE wave transmitted over a section of the accelerator and used it to measure the average electron cloud density over a 50 m section in the positron ring of the PEP-II collider at the Stanford Linear Accelerator Center.
Authors:
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Publication Date:
OSTI Identifier:
925776
Report Number(s):
SLAC-PUB-13181
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US0803086
DOE Contract Number:
AC02-76SF00515
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys.Rev.Lett.100:094801, 2008; Journal Volume: 100
Research Org:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; CHARGED PARTICLES; CLOUDS; ELECTRONS; PHASE SHIFT; POSITRONS; PROBES; STANFORD LINEAR ACCELERATOR CENTER Accelerators,ACCPHY