Title :
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
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;
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.2001.987239
