Electron cloud studies for KEKB

Author

Rumolo, G. ; Zimmermann, F. ; Fukuma, H. ; Ohmi, K.

Author_Institution

SL/AP, CERN, Geneva, Switzerland

Volume

3

fYear

2001

fDate

2001

Firstpage

1889

Abstract

Electron-cloud build up, incoherent tune spread and electron-induced beam instability are likely to be responsible for the vertical beam-size increase observed at the KEKB Low Energy Ring (LER). We report on recent simulations and analytical estimates, addressing the electron-cloud evolution for various magnet configurations, comparing the beam size blow up predicted by three different simulation models (micro-bunches, multi-particle tracking with soft Gaussian approximation, particle-in-cell), and finally discussing analytical expressions for the instability threshold

Keywords

colliding beam accelerators; electron accelerators; particle beam stability; storage rings; KEKB Low Energy Ring; analytical estimates; beam size blow up; electron-cloud build up; electron-induced beam instability; incoherent tune spread; instability threshold; magnet configurations; micro-bunches; multi-particle tracking; particle-in-cell; simulation models; soft Gaussian approximation; vertical beam-size increase; Analytical models; Clouds; Electron beams; Magnetic analysis; Particle beams; Particle tracking; Pattern analysis; Predictive models; Saturation magnetization; Solenoids;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001

Conference_Location

Chicago, IL

Print_ISBN

0-7803-7191-7

Type

conf

DOI

10.1109/PAC.2001.987217

Filename

987217