The magnetic field, temperature, strain and angular dependence of the critical current density for Nb-Ti [dataset]

Chislett-McDonald, S. B. L. (Superconductivity Group, Centre for Materials Physics, Department of Physics, Durham University, DH1 3LE, UK); Hampshire, D. P. (Superconductivity Group, Centre for Materials Physics, Department of Physics, Durham University, DH1 3LE, UK); Tsui, Y. (Superconductivity Group, Centre for Materials Physics, Department of Physics, Durham University, DH1 3LE, UK); Kovari, M. (Culham Centre for Fusion Energy, Culham Science Centre, Abingdon, OX14 3EB, UK); Surrey, E. (Culham Centre for Fusion Energy, Culham Science Centre, Abingdon, OX14 3EB, UK)

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The magnetic field, temperature, strain and angular dependence of the critical current density for Nb-Ti [dataset] Open Access

A scaling law for J c in commercial Nb-Ti wire is proposed that describes its magnetic field, temperature and strain dependence. The scaling law is used to fit extensive measurements of the total strand critical current density, J c,TS(B, T, ε), with the applied field orthogonal to the axis of the wire. We present critical current density, heat capacity and resistivity measurements to obtain ${B}_{{\rm{c}}2}^{* }(\theta )$, which shows clear angular anisotropy. At 4.2 K, the resistivity data show ${B}_{{\rm{c}}2}^{* }(B\parallel J)-{B}_{{\rm{c}}2}^{* }(B\perp J)\approx 1\,{\rm{T}}$. We also discuss whether the fusion community should consider re-optimising standard commercial Nb-Ti wires that were developed for MRI applications at ~ 5 T, to produce higher J c at say 10T, and higher upper critical fields, perhaps using quaternary Nb-Ti alloys with artificial pinning centres.

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Resource type: Dataset
Contributors: Creator: Chislett-McDonald, S. B. L. ¹
Editor: Kovari, M. ²
Editor: Surrey, E. ²
Editor: Hampshire, D. P. ¹
Editor: Tsui, Y. ¹

¹ Superconductivity Group, Centre for Materials Physics, Department of Physics, Durham University, DH1 3LE, UK
² Culham Centre for Fusion Energy, Culham Science Centre, Abingdon, OX14 3EB, UK
Funder: Engineering and Physical Sciences Research Council
Research methods
Other description
Keyword: Multifilamentary superconductors
Type II superconductors
Niobium-Titanium
Subject: Superconductors--Magnetic properties
Niobium alloys
Location
Language
Cited in: doi:10.1088/1742-6596/1559/1/012063
Identifier: ark:/32150/r2qv33rw65q
doi:10.15128/r2qv33rw65q
Publisher: Durham University
Date Created

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Depositor: S.B.L. Chislett Mcdonald
Date Uploaded: 8 March 2019, 11:03:44
Date Modified: 26 February 2021, 10:02:29
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Characterization: File format: zip (ZIP Format)

Mime type: application/zip

File size: 72722

Last modified: 2020:06:21 12:50:41+01:00

Filename: FIGURES_CSV.zip

Original checksum: 4ca02b05386754d688f8e7b18f67ed3f

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