Strain and Magnetization Properties of High Subelement Count Tube-Type Nb3Sn Strands

Journal Article · Wed Aug 03 04:00:00 EDT 2011 · IEEE Transactions on Applied Superconductivity

DOI:https://doi.org/10.1109/TASC.2010.2100013· OSTI ID:1025508

Peng, X; Ghosh, A; Gregory, E; Tomsic, M; Sumption, M D; Lu, X F; Cheggour, N; Stauffer, T C; Goodrich, L F; Splett, J D

A tubular technique for economical production of Nb{sub 3}Sn material with large numbers of subelements is being explored by Supergenics I LLC and Hyper Tech Research Inc. The number of subelements was increased to 919 (744 subelements plus 175 Cu filaments) by increasing the size at which restacking is carried out. The product exhibited no fabrication problems and was drawn down and tested at a wire diameter of 0.42 mm, where the subelements are 10 {micro}m in diameter. Recently we increased the subelement number to 1387 (1248 subelements plus 139 Cu filaments), which gives a subelement size of 12 {micro}m in 0.7 mm diameter wires. Heat treatment (HT) of different subelement restacks has been investigated, and the best results of critical current and stability are presented. The strain tolerance of the strands with 192 and 744 subelements was also tested, and the strand with fine subelement size showed a high intrinsic irreversible strain limit.

• Research Organization: BROOKHAVEN NATIONAL LABORATORY (BNL)
• Sponsoring Organization: DOE - OFFICE OF SCIENCE
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 1025508
• Report Number(s): BNL--96178-2011-JA; KA1502010
• Journal Information: IEEE Transactions on Applied Superconductivity, Journal Name: IEEE Transactions on Applied Superconductivity Journal Issue: 3 Vol. 21; ISSN 1051-8223
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
CRITICAL CURRENT
FABRICATION
HEAT TREATMENTS
MAGNETIZATION
PRODUCTION
STABILITY
STRAINS
TOLERANCE