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Author Chang, J. ♦ Shu, D. ♦ Decker, G. ♦ Nian, T. ♦ Kuzay, T. ♦ Lumpkin, A. ♦ Wang, X.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS ♦ ADVANCED PHOTON SOURCE ♦ SAFETY ENGINEERING ♦ BEAM MONITORS ♦ ANL ♦ SYNCHROTRON RADIATION ♦ DESIGN ♦ THERMAL ANALYSIS ♦ HEATING LOAD ♦ X-RAY EQUIPMENT
Abstract A missteered beam safety monitor (MBSM) has been designed to protect the accelerator ring of the Advanced Photon Source against incursions of the missteered synchrotron radiation. When the orbit of the particle beam in the accelerator shifts out of its safety limits, the photon beam from the bending magnet will pass through the square apertures on the cooled mask of the MBSM and will heat up a very thin tungsten wire (0.025 mm in diameter) behind the mask. Acting as a resistance thermometer, the electrical resistance of the tungsten wire increases proportionally with temperature rise. As soon as the electrical resistance of the tungsten wire reaches a preset point, a signal is triggered immediately to dump the particle beam in the accelerator. The tungsten wire is inclined to the photon beam at 4.5 degrees in the vertical direction to prevent it from being overheated by the high power photon beam. Detailed mechanical design and thermal analysis are presented. {copyright} {ital 1996 American Institute of Physics.}
ISSN 00346748
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-09-01
Publisher Department Argonne National Laboratory (ANL), Argonne, IL
Publisher Place United States
Journal Review of Scientific Instruments
Volume Number 67
Issue Number 9
Technical Publication No. CONF-9510119-
Organization Argonne National Laboratory (ANL), Argonne, IL


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