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

Volume

3

fYear

2001

fDate

2001

Firstpage

1954

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;

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.2001.987240

Filename

987240