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Title: Electron Cyclotron Resonances in Electron Cloud Dynamics

Abstract

We report a previously unknown resonance for electron cloud dynamics. The 2D simulation code"POSINST" was used to study the electron cloud buildup at different z positions in the International Linear Collider positron damping ring wiggler. An electron equilibrium density enhancement of up to a factor of 3 was found at magnetic field values for which the bunch frequency is an integral multiple of the electron cyclotron frequency. At low magnetic fields the effects of the resonance are prominent, but when B exceeds ~;;(2 pi mec/(elb)), with lb = bunch length, effects of the resonance disappear. Thus short bunches and low B fields are required for observing the effect. The reason for the B field dependence, an explanation of the dynamics, and the results of the 2D simulations and of a single-particle tracking code used to elucidate details of the dynamics are discussed.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Accelerator& Fusion Research Division
OSTI Identifier:
935346
Report Number(s):
LBNL-704E
TRN: US0804266
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Conference
Resource Relation:
Conference: The 11th European Particle Accelerator Conference, Genoa, Italy, June 23-27, 2008
Country of Publication:
United States
Language:
English
Subject:
43; ACCELERATORS; BUILDUP; CLOUDS; CYCLOTRON FREQUENCY; CYCLOTRON RESONANCE; DAMPING; ELECTRONS; LINEAR COLLIDERS; MAGNETIC FIELDS; POSITRONS; RESONANCE; SIMULATION; Electron Cloud, POSINST simulation code, cyclotron

Citation Formats

Celata, Christine, Celata, C.M., Furman, Miguel A., Vay, J.-L., and Yu, Jennifer W. Electron Cyclotron Resonances in Electron Cloud Dynamics. United States: N. p., 2008. Web.
Celata, Christine, Celata, C.M., Furman, Miguel A., Vay, J.-L., & Yu, Jennifer W. Electron Cyclotron Resonances in Electron Cloud Dynamics. United States.
Celata, Christine, Celata, C.M., Furman, Miguel A., Vay, J.-L., and Yu, Jennifer W. Wed . "Electron Cyclotron Resonances in Electron Cloud Dynamics". United States. https://www.osti.gov/servlets/purl/935346.
@article{osti_935346,
title = {Electron Cyclotron Resonances in Electron Cloud Dynamics},
author = {Celata, Christine and Celata, C.M. and Furman, Miguel A. and Vay, J.-L. and Yu, Jennifer W.},
abstractNote = {We report a previously unknown resonance for electron cloud dynamics. The 2D simulation code"POSINST" was used to study the electron cloud buildup at different z positions in the International Linear Collider positron damping ring wiggler. An electron equilibrium density enhancement of up to a factor of 3 was found at magnetic field values for which the bunch frequency is an integral multiple of the electron cyclotron frequency. At low magnetic fields the effects of the resonance are prominent, but when B exceeds ~;;(2 pi mec/(elb)), with lb = bunch length, effects of the resonance disappear. Thus short bunches and low B fields are required for observing the effect. The reason for the B field dependence, an explanation of the dynamics, and the results of the 2D simulations and of a single-particle tracking code used to elucidate details of the dynamics are discussed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jun 25 00:00:00 EDT 2008},
month = {Wed Jun 25 00:00:00 EDT 2008}
}

Conference:
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