Title :
Electron cloud studies for KEKB
Author :
Rumolo, G. ; Zimmermann, F. ; Fukuma, H. ; Ohmi, K.
Author_Institution :
SL/AP, CERN, Geneva, Switzerland
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;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987217
