Title :
RF noise driven dipole mode parametric resonance
Author :
Yujong Kim ; Kim, C. ; Kim, K.H. ; Yu, I.H. ; Yang, J.-S. ; Chun, M.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 (PLS) storage ring, we have occasionally experienced the abnormal spontaneous beam. lifetime reduction and strong longitudinal damping. Due to the abnormal beam lifetime reduction, available beam time is reduced substantially. From the recent data analysis of the PLS longitudinal feedback system (LFS) and the streak camera, we have found that the abnormal phenomena can be generated by the RF noise via the dipole mode parametric resonance of the RF phase modulation. We describe the observation of the dipole mode parametric resonance driven by the RF noise and compare it with a simulation result in the PLS storage ring
Keywords :
X-ray production; accelerator RF systems; data acquisition; electron accelerators; electron beams; high energy physics instrumentation computing; parametric instability; particle beam diagnostics; particle beam stability; storage rings; streak cameras; DAQ; LFS; PLS; Pohang Light Source; RF phase modulation; abnormal spontaneous beam lifetime reduction; beam diagnostics; data acquisition system; data analysis; longitudinal feedback system; radiofrequency noise driven dipole mode parametric resonance; storage ring; streak camera; strong longitudinal damping; Cameras; Damping; Data analysis; Feedback; Light sources; Noise generators; Phase noise; Radio frequency; Resonance; Storage rings;
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.2001.987240
