Fast digital feedback system for energy and beam position stabilization

Author

Dickson, R. ; Lebedev, V.A.

Author_Institution

Jefferson Lab., Newport News, VA, USA

Volume

1

fYear

1999

fDate

6/21/1905 12:00:00 AM

Firstpage

646

Abstract

A digital fast feedback system for beam energy and position stabilization at the target of the CEBAF accelerator is capable of suppressing beam motion in the frequency band from 0 to 80 Hz and also performs narrow band suppression at the first twelve power line harmonics. The system utilizes two VME computers and runs at a 2.4 kHz sampling rate. The numerical algorithm is based on a recursive digital filter with an additional feedforward loop for suppression of high power line harmonics. The system suppresses beam motion by a factor greater than ten, thus achieving the stabilization of relative beam energy fluctuations to better than 10^-5 and stabilization of beam position on the target to better than 20 μm

Keywords

accelerator control systems; digital control; electron accelerators; feedback; linear colliders; recursive filters; CEBAF accelerator; VME computers; beam energy stabilization; beam motion; beam position stabilization; fast digital feedback system; feedforward loop; high power line harmonics; narrow band suppression; recursive digital filter; relative beam energy fluctuations; Actuators; Frequency; Hardware; Narrowband; Optical beams; Optical feedback; Optical scattering; Particle beams; Power harmonic filters; Power system harmonics;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1999. Proceedings of the 1999

Print_ISBN

0-7803-5573-3

Type

conf

DOI

10.1109/PAC.1999.795783

Filename

795783