Fast beam-ion instability driven longitudinal damping

Author

Yujong Kim ; Kim, C. ; Kim, K.H. ; Park, C.D. ; Chun, M.H. ; Yang, J.-S. ; Yu, I.H. ; Kwon, M. ; Huang, J.-Y. ; Nam, S.H. ; Cho, M.H. ; Namkung, W. ; Ko, I.S.

Author_Institution

Pohang Accelerator Lab., POSTECH, Pohang, South Korea

Volume

3

fYear

2001

fDate

2001

Firstpage

1951

Abstract

In the Pohang Light Source storage ring, we empty 68 buckets of total 468 buckets to cure the conventional ion trapping. However, the fast beam-ion instability is occasionally generated at higher beam current. Immediately after the strong vertical beam shaking due to the fast beam-ion instability, the longitudinal coupled bunch mode instabilities are substantially damped down without any active feedback system. We have described the fast beam-ion instability driven longitudinal damping and its mechanism in the Pohang Light Source storage ring

Keywords

X-ray production; accelerator cavities; electron accelerators; electron beams; ion accelerators; ion beams; particle beam bunching; particle beam stability; storage rings; Coulomb collisions; PLS; Pohang Light Source storage ring; active feedback system; buckets; conventional ion trapping; electron storage ring; fast beam-ion instability driven longitudinal damping; higher beam current; longitudinal coupled bunch mode instabilities; strong vertical beam shaking; synchrobetatron coupling; Cameras; Damping; Electron beams; Electron traps; Feedback; Light sources; Optical coupling; Radio frequency; Storage rings; Synchrotrons;

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.2001.987239

Filename

987239