Some Factors Involved in the Development of a Tubular Process for Conductors

A process designed to produce Nb 3 Sn conductors by simply restacking Nb 7.5 wt.%Ta tubes with Cu-clad Sn cores is being explored. Previous work has shown that, in this tubular process, the A-15 compound forms in a somewhat different manner from that in the conventional internal-tin process. It was...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2007-06, Vol.17 (2), p.2664-2667
Main Authors: Gregory, E., Zeitlin, B.A., Tomsic, M., Peng, X., Sumption, M.D., Collings, E.W.
Format: Article
Language:English
Subjects:
Assembly
Conductors
Copper
Costs
Critical current density
Design optimization
Magnetic materials
Magnets
Niobium
Process design
Tin
tubular superconductors
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Summary:A process designed to produce Nb 3 Sn conductors by simply restacking Nb 7.5 wt.%Ta tubes with Cu-clad Sn cores is being explored. Previous work has shown that, in this tubular process, the A-15 compound forms in a somewhat different manner from that in the conventional internal-tin process. It was necessary therefore to determine if this had a significant effect on the properties of the A-15 formed. This was done with subelements containing different percentages of Nb 7.5 wt.%Ta, Sn and Cu. The initial work on single subelements has been extended to include restacks with relatively large numbers of subelements. The critical current density (J c ) of the various designs is reported and some of the factors involved in optimizing the properties are discussed.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2007.899990