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Title: High beam current shut-off systems in the APS linac and low energy transfer line

Two independent high beam current shut-off current monitoring systems (BESOCM) have been installed in the APS linac and the low energy transport line to provide personnel safety protection in the event of acceleration of excessive beam currents. Beam current is monitored by a fast current transformer (FCT) and fully redundant supervisory circuits connected to the Access Control Interlock System (ACIS) for beam intensity related shutdowns of the linac. One FCT is located at the end of the positron linac and the other in the low energy transport line, which directs beam to the positron accumulator ring (PAR). To ensure a high degree of reliability, both systems employ a continuous self-checking function, which injects a test pulse to a single-turn test winding after each ``real`` beam pulse to verify that the system is fully functional. The system is designed to be fail-safe for all possible system faults, such as loss of power, open or shorted signal or test cables, loss of external trigger, malfunction of gated integrator, etc. The system has been successfully commissioned and is now a reliable part of the total ACIS. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
Authors:
; ;  [1]
  1. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Publication Date:
OSTI Identifier:
249316
Report Number(s):
CONF-9410219--
Journal ID: APCPCS; ISSN 0094-243X; TRN: 96:014283
DOE Contract Number:
W-31109-ENG-38
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 333; Journal Issue: 1; Conference: Beam instrumentation workshop, Vancouver (Canada), 2-6 Oct 1994; Other Information: PBD: 5 May 1995
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ADVANCED PHOTON SOURCE; BEAM MONITORING; BEAM CURRENTS; ENGINEERED SAFETY SYSTEMS