NDLI: Stability tests of the Westinghouse coil in the International Fusion Superconducting Magnet Test Facility

Content Provider	IEEE Xplore Digital Library
Author	Dresner, L. Fehling, D.T. Lubell, M.S. Lue, J.W. Luton, J.N. McManamy, T.J. Shen, S.S. Wilson, C.T.
Copyright Year	1965
Abstract	The Westinghouse coil is one of three forced-flow coils in the six-coil toroidal array of the International Fusion Superconducting Magnet Test Facility. A discussion is presented of results taken when the coil was tested both individually and in the six-coil array. The tests covered charging to full design current and field, when measuring the current-sharing threshold temperature using resistive heaters (installed to simulate nuclear heating), and when measuring the stability margin using pulsed inductive heaters (used to facilitate stability testing). It was found that at least one section of the conductor exhibits a very broad resistive transition (resistive transition index=4). The broad transition, though causing the appearance of voltage at relatively low temperatures, does not compromise the stability margin of the coil, which was greater than 1.1 J/cm/sup 3/ of strands. In another, nonresistive location, the stability margin was between 1.7 and 1.9 J/cm/sup 3/ of strands. This is from six to ten times larger than the value obtained by analyzing the current-sharing threshold. The cause of this discrepancy has been traced to failure of the conductor to obey the ideal critical-state theory.<>
Sponsorship	IEEE Magnetics Society
Starting Page	779
Ending Page	782
Page Count	4
File Size	538963
File Format	PDF
ISSN	00189464
Volume Number	24
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1988-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stability Testing Superconducting coils Superconducting magnets Test facilities Pulse measurements Current measurement Magnetic field measurement Nuclear measurements Conductors
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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