Author: Ma, L.
Paper Title Page
TUPC09 Longitudinal and Transverse Feedback Systems for the BEPCII Storage Rings 373
  • J. Yue, J.S. Cao, L. Ma, Y.F. Sui, L. Wang, X.Y. Zhao
    IHEP, Beijing, People's Republic of China
  In order to cure the transverse and longitudinal coupled bunch instabilities caused by higher order modes of RF cavities and resistive wall impedance in the BEPCII storage rings, two type bunch by bunch feedback system – a longitudinal feedback system and a transverse feedback system are used. The LFB system are digital system produced by Dimtel Company, the longitudinal kicker is drift-tube type borrowed from SLAC. An analog bunch-by-bunch transverse feedback system was designed and used*. The main components are two sets of beam oscillation detectors, betatron phase adjuster, notch filter and stripline kicker. This paper will describe the achieved results of curing the coupled bunch instabilities by using the LFB and TFB together with current status.
* Performance of the Transverse Coupled-Bunch Feedback System in the BEPCII Storage Ring, Proc. of 40th ICFA ABDW, 2008
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