A device to investigate the axial strain dependence of the critical current density in superconductors

A. Godeke, M. Dhalle, A. Morelli, L. Stobbelaar, H. Van Weeren, H. J.N. Van Eck, W. Abbas, A. Nijhuis, A. Den Ouden, B. Ten Haken

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

We have developed an instrument to study the behavior of the critical current density (/c) in superconducting wires and tapes as a function of field (μ0H), temperature (T), and axial applied strain (εa). The apparatus is an improvement of similar devices that have been successfully used in our institute for over a decade. It encompasses specific advantages such as a simple sample layout, a well defined and homogeneous strain application, the possibility of investigating large compressive strains and the option of simple temperature variation, while improving the main drawback in our previous systems by increasing the investigated sample length by approximately a factor of 10. The increase in length is achieved via a design change from a straight beam section to an initially curved beam, placed perpendicular to the applied field axis in the limited diameter of a high field magnet bore. This article describes in detail the mechanical design of the device and its calibrations. Additionally initial Jca) data, measured at liquid helium temperature, are presented for a bronze processed and for a powder-in-tube Nb3Sn superconducting wire. Comparisons are made with earlier characterizations, indicating consistent behavior of the instrument. The improved voltage resolution, resulting from the increased sample length, enables Jc determinations at an electric field criterion Ec=10 μV/m, which is substantially lower than a criterion of Ec = 100 μV/m which was possible in our previous systems.

LanguageEnglish
Pages5112-5118
Number of pages7
JournalReview of Scientific Instruments
Volume75
Issue number12
DOIs
Publication statusPublished - 1 Dec 2004

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Critical current density (superconductivity)
axial strain
Superconducting materials
Superconducting wire
critical current
current density
curved beams
wire
Superconducting tapes
high field magnets
Bronze
bronzes
liquid helium
layouts
tapes
Magnets
Helium
Temperature distribution
temperature distribution
Electric fields

Cite this

Godeke, A., Dhalle, M., Morelli, A., Stobbelaar, L., Van Weeren, H., Van Eck, H. J. N., ... Ten Haken, B. (2004). A device to investigate the axial strain dependence of the critical current density in superconductors. Review of Scientific Instruments, 75(12), 5112-5118. https://doi.org/10.1063/1.1819384
Godeke, A. ; Dhalle, M. ; Morelli, A. ; Stobbelaar, L. ; Van Weeren, H. ; Van Eck, H. J.N. ; Abbas, W. ; Nijhuis, A. ; Den Ouden, A. ; Ten Haken, B. / A device to investigate the axial strain dependence of the critical current density in superconductors. In: Review of Scientific Instruments. 2004 ; Vol. 75, No. 12. pp. 5112-5118.
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Godeke, A, Dhalle, M, Morelli, A, Stobbelaar, L, Van Weeren, H, Van Eck, HJN, Abbas, W, Nijhuis, A, Den Ouden, A & Ten Haken, B 2004, 'A device to investigate the axial strain dependence of the critical current density in superconductors', Review of Scientific Instruments, vol. 75, no. 12, pp. 5112-5118. https://doi.org/10.1063/1.1819384

A device to investigate the axial strain dependence of the critical current density in superconductors. / Godeke, A.; Dhalle, M.; Morelli, A.; Stobbelaar, L.; Van Weeren, H.; Van Eck, H. J.N.; Abbas, W.; Nijhuis, A.; Den Ouden, A.; Ten Haken, B.

In: Review of Scientific Instruments, Vol. 75, No. 12, 01.12.2004, p. 5112-5118.

Research output: Contribution to journalArticle

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AU - Godeke, A.

AU - Dhalle, M.

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AU - Van Weeren, H.

AU - Van Eck, H. J.N.

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AU - Nijhuis, A.

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AU - Ten Haken, B.

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