Title :
Study of coupled-bunch collective effects in the ALS
Author :
Byrd, J.M. ; Corlett, J.N.
Author_Institution :
Lawrence Berkeley Lab., CA, USA
Abstract :
We present an overview of the calculated longitudinal and transverse coupled-bunch (CB) growth rates using the measured RF cavity higher order mode (HOM) impedance for the Advanced Light Source (ALS), a 1.5 GeV electron storage ring for producing synchrotron radiation. We also describe a visual method of representing the effective beam impedance and corresponding growth rates which is especially useful for understanding the dependence of growth rate on HOM frequency and Q, for determining the requirements of the CB feedback system, and for interpreting measured beam spectra
Keywords :
beam handling techniques; particle beam diagnostics; storage rings; 1.5 GeV; ALS; Advanced Light Source; HOM frequency; Q value; RF cavity; coupled bunch feedback system; coupled-bunch collective effects; effective beam impedance; electron storage ring; higher order mode impedance; longitudinal coupled-bunch growth rates; transverse coupled-bunch growth rates; Electrons; Feedback; Frequency measurement; Impedance measurement; Light sources; Optical coupling; Q measurement; Radio frequency; Storage rings; Synchrotron radiation;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309638
