NDLI: Internal Tin <formula formulatype=inline><tex Notation=TeX>${hbox {Nb}}_{3}{hbox {Sn}}$</tex></formula> Conductors Engineered for Fusion and Particle Accelerator Applications

Content Provider	IEEE Xplore Digital Library
Author	Parrell, J.A. Youzhu Zhang Field, M.B. Meinesz, M. Yibing Huang Hanping Miao Seung Hong Cheggour, N. Goodrich, L.
Copyright Year	2002
Abstract	The critical current density (J_c) of Nb₃Sn strand has been significantly improved over the last several years. For most magnet applications, high J_c internal tin has displaced bronze process strand. The highest J_c values are obtained from distributed barrier strands. We have continued development of strands made with Nb-47 wt%Ti rods to supply the dopant, and have achieved J_c values of 3000 A/mm² (12 T, 4.2 K). Such wires have very good higher field performance as well, reaching 1700 A/mm² at 15 T. To reduce the effective filament diameter in these high J_c strands, the number of subelement rods incorporated into the final restack billet has been increased to 127 in routine production, and results are presented on experimental 217 stacks. A new re-extrusion technique for improving the monofilament shape is also described. For fusion applications such as ITER, we have developed single-barrier internal tin strands having non-Cu J_c values over 1100 A/mm² (12 T, 4.2 K) with hysteresis losses less than 700 mJ/cm³ over non-Cu volume. The J_c-strain behavior of such composites is also presented.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2573
Ending Page	2579
Page Count	7
File Size	1094030
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Tin Superconducting magnets Niobium Wire Conductors Billets Nuclear magnetic resonance Magnetic resonance US Department of Energy Instruments superconducting materials Internal tin ${\hbox {Nb}}_{3}{\hbox {Sn}}$
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Development of Internal Tin ${hbox{Nb}}_{3}{hbox{Sn}}$ Conductor for Fusion and Particle Accelerator Applications

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