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Fast Feedback System for CEBAF [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 1995.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
680 Kilobytes pages : digital, PDF file
Additional Creators
Thomas Jefferson National Accelerator Facility (U.S.), United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A fast feedback system based on concepts of modern control theory has been implemented in the CEBAF Control System to stabilize various machine parameters. The continuous wave operation of CEBAF requires that parameters such as beam energy and position are stabilized against fast fluctuations. The beam energy must be stabilized against fast gradient and phase fluctuations in the RF accelerating system. This fast feedback system currently operates at 60 Hz rate and is integrated with EPICS. The mathematical model of the system for various feedback loops is expressed in state space formalism. The design of control law and simulation of closed-loop system response is performed using MatlabTM and SimulinkTM. This paper describes the process of designing control algorithms, implementation of the fast feedback system and operational experience with this system at CEBAF. The performance of this feedback system, while operating at much higher rates with high closed loop gain, can be enhanced by continually performing on-line identification of the system from the input and output data. System identification is the process of developing or improving an analytically derived mathematical representation of a physical system using experimental data. The current status of this feature is presented.
Report Numbers
E 1.99:jlab-acc-95-001
E 1.99: doe/er/40150-1835
doe/er/40150-1835
jlab-acc-95-001
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Note
Published through SciTech Connect.
10/01/1995.
"jlab-acc-95-001"
" doe/er/40150-1835"
ICALEPCS 95, Chicago, IL (US), 10/29/1995--11/03/1995.
G.A. Krafft; H. Shoaee; M.P. Chowdhary; W.A. Watson III.
Funding Information
AC05-84ER40150
View MARC record | catkey: 14691917