Simulation of the ALS longitudinal multibunch feedback system

Author

Byrd, John

Author_Institution

Lawrence Berkeley Lab., CA, USA

fYear

1993

fDate

17-20 May 1993

Firstpage

2349

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1993., Proceedings of the 1993

Conference_Location

Washington, DC

Print_ISBN

0-7803-1203-1

Type

conf

DOI

10.1109/PAC.1993.309318

Filename

309318