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A probe for investigating the effects of temperature, strain, and magnetic field on transport critical currents in superconducting wires and tapes

Cheggour, N; Hampshire, DP

A probe for investigating the effects of temperature, strain, and magnetic field on transport critical currents in superconducting wires and tapes Thumbnail


Authors

N Cheggour



Abstract

A variable-temperature probe has been developed to study the effect of strain on the transport properties of superconducting wires and tapes in high magnetic fields. The strain is applied to the wire by soldering it to a thick coiled spring and twisting one end of the spring with respect to the other. Strain can be applied reversibly from −0.7% to +0.7%. Measurements can be performed either in (pumped) cryogen or under vacuum. When immersed in liquid helium at 4.2 K, the probe can carry at least 200 A. From 6 to 16 K, with thin (low-loss) current leads the temperature of the sample is stable to ±45 mK for currents around 15 A, and to ±100 mK for currents around 25 A. With thick current leads, ±10 mK stability is achieved for currents up to 85 A. Full details of the probe design are described. Results obtained for a bronze processed niobium–tin multifilamentary wire are presented.

Journal Article Type Article
Acceptance Date Sep 30, 2000
Online Publication Date Nov 30, 2000
Publication Date Dec 31, 2000
Deposit Date Sep 20, 2019
Publicly Available Date Sep 20, 2019
Journal Review of Scientific Instruments
Print ISSN 0034-6748
Electronic ISSN 1089-7623
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 71
Issue 12
Pages 4521-4530
DOI https://doi.org/10.1063/1.1324734
Keywords CRITICAL-CURRENT DENSITY; ROOM-TEMPERATURE; COMPOSITE WIRE; MULTIFILAMENTARY WIRES; THERMAL CONTRACTION; NB3SN CONDUCTORS; SCALING LAW; DEPENDENCE
Public URL https://durham-repository.worktribe.com/output/1531712
Related Public URLs http://www.dur.ac.uk/superconductivity.durham/chegrsi7112452100.pdf

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Copyright Statement
© 2000 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Cheggour, N & Hampshire, DP (2000). A probe for investigating the effects of temperature, strain, and magnetic field on transport critical currents in superconducting wires and tapes. Review of Scientific Instruments 71(12): 4521-4530 and may be found at https://doi.org/10.1063/1.1324734






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