Low frequency longitudinal relaxation oscillation

Author

Yujong Kim ; Kim, C. ; Kim, K.H. ; 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

1960

Abstract

From the recent data analysis of the longitudinal feedback system and the streak camera, we have found a longitudinal relaxation beam oscillation whose frequency is a multiple of 36 Hz. When the relaxation oscillation is generated, horizontally oscillating wide beams are observed at the diagnostic beamline, and the beam lifetime is fluctuated. The strength of the longitudinal coupled bunch mode instabilities is also modulated sinusoidally. We have described the observed longitudinal relaxation oscillation in the Pohang Light Source storage ring

Keywords

X-ray production; accelerator RF systems; accelerator cavities; electron accelerators; electron beams; oscillations; particle beam bunching; particle beam diagnostics; particle beam stability; storage rings; streak cameras; 36 Hz; PLS; Pohang Light Source storage ring; beam lifetime fluctuation; data analysis; diagnostic beamline; horizontally oscillating wide beams; longitudinal coupled bunch mode instabilities; longitudinal feedback system; low frequency longitudinal relaxation oscillation; sinusoidal modulation; streak camera; Amplitude modulation; Cameras; Data analysis; Laboratories; Light sources; Optical modulation; Particle beams; 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.2001.987242

Filename

987242