Title :
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
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;
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.2001.987242
