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 ν<strong>β+ν</strong>s and ν<strong>β+2ν</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, +1-2ν<strong>s, while general strong head-tail instabilities give frequency with negative shift ν</strong>beta-ν_s. We study the synchro-beta spectrum using a code, PEHTS, which simulates single bunch electron cloud instability. |