Damping rates of the SRRC storage ring

Author

Hsu, K.T. ; Kuo, C.C. ; Lau, W.K. ; Weng, W.T.

Author_Institution

Synchrotron Radiat. Res. Center, Hsinchu, Taiwan

Volume

1

fYear

1995

fDate

1-5 May 1995

Firstpage

579

Abstract

The SRRC storage ring is a low emittance synchrotron radiation machine with nominal operation energy 1.3 GeV. The design damping time due to synchrotron radiation is 10.7, 14.4, 8.7 ms for the horizontal, vertical and longitudinal plane, respectively. We measured the real machine damping time as a function of bunch current, chromaticity, etc. To damp the transverse beam instability, especially in the vertical plane, we need to increase the chromaticity to a large positive value. The damping rates are much larger than the design values. The Landau damping contribution in the longitudinal plane is quite large, especially in the multibunch mode. The estimated synchrotron tune spread from the Landau damping is in agreement with the measured coherent longitudinal coupled bunch oscillation amplitude

Keywords

beam handling techniques; colliding beam accelerators; electron accelerators; particle beam stability; storage rings; 1.3 GeV; 10.7 ms; 14.4 ms; 8.7 ms; Landau damping; SRRC storage ring; bunch current; chromaticity; coherent longitudinal coupled bunch oscillation amplitude; damping rates; design damping time; low emittance synchrotron radiation machine; multibunch mode; synchrotron tune spread; transverse beam instability; Amplitude estimation; Current measurement; Damping; Extraterrestrial measurements; Light sources; Magnets; Nonlinear dynamical systems; Research and development; Storage rings; Synchrotron radiation;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.504725

Filename

504725