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Title: Electron Cloud Cyclotron Resonances in the Presence of a Short-bunch-length Relativistic Beam

Abstract

Computer simulations using the 2D code"POSINST" were used to study the formation of the electron cloud in the wiggler section of the positron damping ring of the International Linear Collider. In order to simulate an x-y slice of the wiggler (i.e., a slice perpendicular to the beam velocity), each simulation assumed a constant vertical magnetic field. At values of the magnetic field where the cyclotron frequency was an integral multiple of the bunch frequency, and where the field strength was less than approximately 0.6 T, equilibrium average electron densities were up to three times the density found at other neighboring field values. Effects of this resonance between the bunch and cyclotron frequency are expected to be non-negligible when the beam bunch length is much less than the product of the electron cyclotron period and the beam velocity, for a beam moving at v~;;c. Details of the dynamics of the resonance are described.

Authors:
; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Accelerator& Fusion Research Division
OSTI Identifier:
937454
Report Number(s):
LBNL-1002E
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Special Topics-- Accelerators and Beams; Journal Volume: 11; Journal Issue: 9; Related Information: Journal Publication Date: September 2008
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Celata, C.M., Furman, Miguel A., Vay, J.-L., and Yu, Jennifer W. Electron Cloud Cyclotron Resonances in the Presence of a Short-bunch-length Relativistic Beam. United States: N. p., 2008. Web. doi:10.1103/PhysRevSTAB.11.091002.
Celata, C.M., Furman, Miguel A., Vay, J.-L., & Yu, Jennifer W. Electron Cloud Cyclotron Resonances in the Presence of a Short-bunch-length Relativistic Beam. United States. doi:10.1103/PhysRevSTAB.11.091002.
Celata, C.M., Furman, Miguel A., Vay, J.-L., and Yu, Jennifer W. Tue . "Electron Cloud Cyclotron Resonances in the Presence of a Short-bunch-length Relativistic Beam". United States. doi:10.1103/PhysRevSTAB.11.091002. https://www.osti.gov/servlets/purl/937454.
@article{osti_937454,
title = {Electron Cloud Cyclotron Resonances in the Presence of a Short-bunch-length Relativistic Beam},
author = {Celata, C.M. and Furman, Miguel A. and Vay, J.-L. and Yu, Jennifer W.},
abstractNote = {Computer simulations using the 2D code"POSINST" were used to study the formation of the electron cloud in the wiggler section of the positron damping ring of the International Linear Collider. In order to simulate an x-y slice of the wiggler (i.e., a slice perpendicular to the beam velocity), each simulation assumed a constant vertical magnetic field. At values of the magnetic field where the cyclotron frequency was an integral multiple of the bunch frequency, and where the field strength was less than approximately 0.6 T, equilibrium average electron densities were up to three times the density found at other neighboring field values. Effects of this resonance between the bunch and cyclotron frequency are expected to be non-negligible when the beam bunch length is much less than the product of the electron cyclotron period and the beam velocity, for a beam moving at v~;;c. Details of the dynamics of the resonance are described.},
doi = {10.1103/PhysRevSTAB.11.091002},
journal = {Physical Review Special Topics-- Accelerators and Beams},
number = 9,
volume = 11,
place = {United States},
year = {Tue Sep 02 00:00:00 EDT 2008},
month = {Tue Sep 02 00:00:00 EDT 2008}
}