Actions for VAMAS interlaboratory comparisons of critical current vs. strain in Nb{sub 3}Sn [electronic resource].

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VAMAS interlaboratory comparisons of critical current vs. strain in Nb{sub 3}Sn [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1989.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
5 pages : digital, PDF file
Additional Creators
United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A comparison is made of measurements of the effect of axial tensile strain on the critical current of multifilamentary Nb₃Sn superconductors by three different laboratories. Two of the laboratories used short sample testing apparatus wherein a straight section of conductor was cooled in a force-free state. One of the laboratories used a spring apparatus wherein a long sample was reacted in a coil shape and attached to a spring sample holder. The agreement between the results for the two laboratories that used the straight sample apparatus was quite good, within 15% for all three conductors at 15 T, except at very high strain for one conductor which had an upper critical field close to the measurement field. To make a comparison with the data obtained using the spring method, it was necessary to fit the data to the compressive prestrain determined using the straight-sample technique. With such a fit, the agreement was variable, between 15 and 25% depending on the conductor. Values of the prestrain and irreversible strain obtained from the straight sample data agreed within 0.06% and 0.05% respectively. Values of the maxi (strain-free) upper critical fields agreed within several tenths of a tesla.
Report Numbers
E 1.99:conf-8902131--3
conf-8902131--3
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
12/31/1989.
"conf-8902131--3"
"DE95016656"
6. Japan-US workshop on high field superconductors materials and standard procedures for high-field superconducting materials testing, Boulder, CO (United States), 22-24 Feb 1989.
Ekin, J.W.
National Inst. of Standards and Technology, Boulder, CO (United States)
Funding Information
AI01-84ER52113
View MARC record | catkey: 14457228