CERN Accelerating science

Article
Title	Simulation Analysis of Head-Tail Motion Caused by Electron Cloud
Author(s)	Ohmi, Kazuhito ; Flanagan, John W ; Fukuma, Hitoshi ; Hiramatsu, Shigenori ; Ikeda, Hitomi ; Perevedentsev, Evgueni ; Tobiyama, Makoto
Affiliation	(BINP SB RAS, Novosibirsk) ; (KEK, Ibaraki)
Publication	2005
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.907
Subject category	Accelerators and Storage Rings
Abstract	Synchro-beta side band caused by electron cloud instability has been observed at KEK-B factory. The side-band appears between $&#0957;<strong>&#0946;+&#0957;</strong>s$ and $&#0957;<strong>&#0946;+2&#0957;</strong>s$ above the threshold of beam size blow up and disappear by applying solenoid field. The side-band is an evidence of strong head-tail instability caused by electron cloud. The side-band is characterized by positive shift, $+1-2&#0957;<strong>s$, while general strong head-tail instabilities give frequency with negative shift $&#0957;</strong>beta-&#0957;_s$. We study the synchro-beta spectrum using a code, PEHTS, which simulates single bunch electron cloud instability.