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Title: Beam induced electron cloud resonances in dipole magnetic fields

Abstract

The buildup of low energy electrons in an accelerator, known as electron cloud, can be severely detrimental to machine performance. Under certain beam conditions, the beam can become resonant with the cloud dynamics, accelerating the buildup of electrons. This paper will examine two such effects: multipacting resonances, in which the cloud development time is resonant with the bunch spacing, and cyclotron resonances, in which the cyclotron period of electrons in a magnetic field is a multiple of bunch spacing. Both resonances have been studied directly in dipole fields using retarding field analyzers installed in the Cornell Electron Storage Ring. These measurements are supported by both analytical models and computer simulations.

Authors:
; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1261698
Alternate Identifier(s):
OSTI ID: 1379413
Grant/Contract Number:  
PHY-0734867; PHY-1002467; PHYS-1068662; FC02-08ER41538; SC0006505; AC02-05CH11231; FC02-08ER42538
Resource Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Name: Physical Review Accelerators and Beams Journal Volume: 19 Journal Issue: 7; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Calvey, J. R., Hartung, W., Makita, J., and Venturini, M. Beam induced electron cloud resonances in dipole magnetic fields. United States: N. p., 2016. Web. doi:10.1103/PhysRevAccelBeams.19.074401.
Calvey, J. R., Hartung, W., Makita, J., & Venturini, M. Beam induced electron cloud resonances in dipole magnetic fields. United States. doi:10.1103/PhysRevAccelBeams.19.074401.
Calvey, J. R., Hartung, W., Makita, J., and Venturini, M. Tue . "Beam induced electron cloud resonances in dipole magnetic fields". United States. doi:10.1103/PhysRevAccelBeams.19.074401.
@article{osti_1261698,
title = {Beam induced electron cloud resonances in dipole magnetic fields},
author = {Calvey, J. R. and Hartung, W. and Makita, J. and Venturini, M.},
abstractNote = {The buildup of low energy electrons in an accelerator, known as electron cloud, can be severely detrimental to machine performance. Under certain beam conditions, the beam can become resonant with the cloud dynamics, accelerating the buildup of electrons. This paper will examine two such effects: multipacting resonances, in which the cloud development time is resonant with the bunch spacing, and cyclotron resonances, in which the cyclotron period of electrons in a magnetic field is a multiple of bunch spacing. Both resonances have been studied directly in dipole fields using retarding field analyzers installed in the Cornell Electron Storage Ring. These measurements are supported by both analytical models and computer simulations.},
doi = {10.1103/PhysRevAccelBeams.19.074401},
journal = {Physical Review Accelerators and Beams},
number = 7,
volume = 19,
place = {United States},
year = {2016},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevAccelBeams.19.074401

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