Title :
Simulation of the ALS longitudinal multibunch feedback system
Author_Institution :
Lawrence Berkeley Lab., CA, USA
Abstract :
Longitudinal coupled bunch growth rates in the Advanced Light Source (ALS), a 1.5 GeV electron storage ring for producing synchrotron radiation, indicate the need for damping via a feedback (FB) system. The design of the system is based on the proposed PEP-II longitudinal FB system which uses a digital filter to provide the required phase and amplitude response. We report the results of a detailed computer simulation of the FB system including single particle longitudinal beam dynamics, measured RF cavity fundamental and higher order modes, and response of major FB components such as the power amplifier and kicker. The simulation addresses issues such as required FB power and gain, noise, digital filter effects, and varying initial bunch conditions
Keywords :
cavity resonators; electron accelerators; microwave filters; particle beam diagnostics; physics computing; storage rings; synchrotron radiation; 1.5 GeV; ALS longitudinal multibunch feedback system simulation; Advanced Light Source; RF cavity fundamental mode; amplitude response; damping; digital filter; electron storage ring; feedback system; gain; higher order modes; initial bunch conditions; kicker; longitudinal coupled bunch growth rates; noise; phase response; power; power amplifier; single particle longitudinal beam dynamics; synchrotron radiation; Computer simulation; Damping; Digital filters; Electrons; Feedback; Light sources; Optical coupling; Particle beams; 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.1993.309318
