DocumentCode :
2898273
Title :
Self-consistent 3D modeling of electron cloud dynamics and beam response
Author :
Furman, M.A. ; Celata, C.M. ; Kireeff-Covo, M. ; Sonnad, K.G. ; Vay, J.L. ; Venturini, M. ; Cohen, R. ; Friedman, A. ; Grote, D. ; Molvik, A. ; Stoltz, P.
Author_Institution :
LBNL, Berkeley
fYear :
2007
fDate :
25-29 June 2007
Firstpage :
764
Lastpage :
768
Abstract :
We present recent advances in the modeling of beam- electron-cloud dynamics, including surface effects such as secondary electron emission, gas desorption, etc, and volumetric effects such as ionization of residual gas and charge-exchange reactions. Simulations for the HCX facility with the code WARP/POSINST will be described and their validity demonstrated by benchmarks against measurements. The code models a wide range of physical processes and uses a number of novel techniques, including a large-timestep electron mover that smoothly interpolates between direct orbit calculation and guiding-center drift equations, and a new computational technique, based on a Lorentz transformation to a moving frame, that allows the cost of a fully 3D simulation to be reduced to that of a quasi-static approximation.
Keywords :
Lorentz transformation; cyclotrons; desorption; electron accelerators; ionisation; particle beam bunching; particle beam dynamics; secondary electron emission; storage rings; 3D simulation; HCX facility; Lorentz transformation; WARP/POSINST code; beam bunching; beam-electron-cloud dynamics; charge-exchange reactions; electron cyclotron; gas desorption; guiding-center drift equations; orbit calculation; quasistatic approximation; residual gas ionization; secondary electron emission; self-consistent 3D modeling; surface effects; volumetric effects; Clouds; Computational modeling; Costs; Electron beams; Electron emission; Equations; Extraterrestrial measurements; Ionization; Orbital calculations; Physics computing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
Type :
conf
DOI :
10.1109/PAC.2007.4441093
Filename :
4441093
Link To Document :
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