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Title: Fast digital feedback system for energy beam position stabilization

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[sup [minus]5] and stabilization of beam position on the target to better than 20 [mu]m.
Authors:
;
Publication Date:
OSTI Identifier:
5821056
Report Number(s):
DOE/ER/40150-1401; JLAB-ACP-99-02
DOE Contract Number:
AC05-84ER40150
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, No location, No date
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Energy Research (ER) (United States)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; CEBAF ACCELERATOR; COMPUTERIZED CONTROL SYSTEMS; DIGITAL FILTERS; FEEDBACK; BEAM POSITION; ALGORITHMS; HARMONICS; LINEAR ACCELERATORS; ON-LINE CONTROL SYSTEMS; MATHEMATICAL LOGIC; OSCILLATIONS; ACCELERATORS; CONTROL SYSTEMS; ON-LINE SYSTEMS 430300* -- Particle Accelerators-- Auxiliaries & Components