Open AccessMeasurement of Electron Clouds in Large Accelerators by Microwave Dispersion
Author(s) -
Stefano De Santis,
J. Byrd,
F. Caspers,
A. Krasnykh,
T. Kroyer,
M. Pivi,
K. Sonnad
Publication year - 2008
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.100.094801
Subject(s) - physics , electron , collider , microwave , particle accelerator , linear particle accelerator , atomic physics , beam (structure) , cathode ray , dispersion (optics) , measure (data warehouse) , nuclear physics , positron , optics , quantum mechanics , database , computer science
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
Accelerating Research
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