Simulation of the synchro-betatron sideband instability caused by electron clouds at KEKB

Electron clouds cause a fast head-tail instability above a threshold density. Experiments at KEKB revealed the presence of a synchro-betatron sideband above the beam blow-up threshold, which indicates the presence of the head-tail instability. The sideband appears near nu y + knu s , where 1 < k...

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Bibliographic Details
Main Authors: Benedetto, E., Flanagan, J.W., Jin, H.C., Ohmi, K.
Format: Conference Proceeding
Language:English
Subjects:
Clouds
Computer simulation
Electromagnetic fields
Electron beams
Particle beams
Positrons
Shape
Solenoids
Strontium
Threshold current
Online Access:Request full text
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Summary:Electron clouds cause a fast head-tail instability above a threshold density. Experiments at KEKB revealed the presence of a synchro-betatron sideband above the beam blow-up threshold, which indicates the presence of the head-tail instability. The sideband appears near nu y + knu s , where 1 < k < 2, which differs from ordinary instability seen near nu y - nu s . We study the origin of the sideband using a computer simulation.
ISSN:1944-4680
2152-9582
DOI:10.1109/PAC.2007.4439955