Electron-beam position monitoring and feedback control in DukeFree-Electron Laser Facility
Moallem, M.
Dept. of Electr. & Comput. Eng., Univ. of Western Ontario, London, Ont.;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Apr 2002
Volume: 49,
Issue: 2
On page(s): 423-432
ISSN: 0278-0046
References Cited: 15
CODEN: ITIED6
INSPEC Accession Number: 7232990
Digital Object Identifier: 10.1109/41.993276
Current Version Published: 2002-08-07
Abstract
This paper addresses data acquisition and feedback control of
electron-beam positions in the Duke University Free-Electron Laser
Facility. The control system consists of a distributed system of
VME-based hardware and processors connected through a network to host
workstations. The host workstations provide graphical data presentation
to the user and are also used for high-level supervisory control. The
electron-beam profile is controlled by electromagnetic forces generated
by passing currents through the coils of correction magnets distributed
around the ring. A desired control objective is to move the stored
electron beam to specific locations in the vacuum chamber and to
stabilize the orbit in the presence of disturbances. The technical
details of implementing the data acquisition and control scheme and
their integration with the existing control system modules are presented
along with experimental results
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