Control of multibunch longitudinal instabilities and beam diagnostics using a DSP-based feedback system

Author

Teytelman, D. ; Claus, R. ; Fox, J. ; Hindi, H. ; Larsen, R. ; Linscott, I. ; Prabhakar, S. ; Ross, W. ; Young, A. ; Drago, A. ; Serio, M. ; Stover, G.

Author_Institution

Linear Accel. Center, Stanford Univ., CA, USA

Volume

2

fYear

1997

fDate

12-16 May 1997

Firstpage

2284

Abstract

A bunch-by-bunch longitudinal feedback system has been designed and built to control coupled-bunch instabilities in the PEP-II machine. A prototype system has been installed at the Advanced Light Source at LBNL. Programmable DSPs allow longitudinal feedback processing in conjunction with data acquisition or instrumentation algorithms. Here we describe techniques developed for different beam and system diagnostics, such as measurements of the modal growth and damping rates and measurements of the bunch-by-bunch currents. Results from the Advanced Light Source are presented to illustrate these techniques

Keywords

X-ray production; accelerator control systems; colliding beam accelerators; computerised control; data acquisition; digital signal processing chips; electron accelerators; feedback; high energy physics instrumentation computing; particle beam bunching; particle beam diagnostics; particle beam stability; signal processing; storage rings; ALS; Advanced Light Source; DSP-based feedback system; PEP-II; beam diagnostics; bunch-by-bunch longitudinal feedback system; coupled-bunch instabilities; damping rates; data acquisition; digital signal processing; longitudinal feedback processing; modal growth; multibunch longitudinal instabilities control; prototype system; Control systems; Current measurement; Damping; Digital signal processing; Feedback; Laboratories; Light sources; Motion control; Signal processing algorithms; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1997. Proceedings of the 1997

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-4376-X

Type

conf

DOI

10.1109/PAC.1997.751183

Filename

751183