Normal-zone propagation velocity in superconducting wires having a CuNi matrix

Atsushi Ishiyama, Y. Sato, M. Tsuda

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    Abstract

    The thermal behavior and the electromagnetic behavior of superconducting wires during quench are apparently different from those of conventional copper-stabilized composites. To investigate these properties, the authors consider the effects of the temperature gradient in a radial direction of the wire cross-section and the redistribution of currents in the normal-zone wavefront. They measured longitudinal normal-zone propagation velocities in NbTi/CuNi composite wires (strands) with different cooling characteristics and compared the measurement results with analytical results obtained by means of the three-dimensional finite-element method (3-D FEM), taking into account the redistribution of currents and the influence of the transverse electrical conductance on the current sharing in a composite. The analytical and experimental results agree well. On the basis of these comparisons, the mechanism of normal-zone propagation in superconducting wires with a CuNi matrix is discussed.

    Original languageEnglish
    Pages (from-to)2076-2079
    Number of pages4
    JournalIEEE Transactions on Magnetics
    Volume27
    Issue number2 pt III
    DOIs
    Publication statusPublished - 1991 Mar

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    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Physics and Astronomy (miscellaneous)

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