[Table of Contents]

Plasma and Fusion Research

Volume 8, 2405008 (2013)

Regular Articles

Effect of Bending on Critical Current and n-Value of React-and-Jacket Processed Nb3Sn Conductor
Kazuya TAKAHATA, Hitoshi TAMURA, Toshiyuki MITO, Shinsaku IMAGAWA and Akio SAGARA
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
(Received 21 November 2012 / Accepted 22 January 2013 / Published 27 March 2013)

Abstract

A “react-and-jacket” processed Nb3Sn conductor consisting of a Rutherford cable and aluminum-alloy jacket has been developed for fusion magnets. This study investigates the effect of bending on the critical current and the n-value of this conductor, which has a cross-section of 17 × 4.9 mm2. The conductor was wound in a three-turn coil and its critical current was measured in a superconducting magnet. The degradation of the critical current and the n-value due to the bending strain were assessed using an empirical formula for the strain dependence.

Keywords

Nb3Sn conductor, Rutherford cable, critical current, n-value, bending strain

DOI: 10.1585/pfr.8.2405008

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References

  • [1] K. Takahata et al., Cryogenics 51, 397 (2011).
  • [2] K. Takahata et al., Fusion Eng. Des. 82, 1487 (2007).
  • [3] H. Tamura et al., Plasma Fusion Res. 5, S1035 (2010).
  • [4] M. Sugimoto et al., IEEE Trans. Appl. Super. 22, 4802905 (2012).
  • [5] C.J. Dawes and W.M. Thomas, Weld. J. 75, 41 (1996).
  • [6] M. Takayasu et al., Supercond. Sci. Technol. 24, 045012 (2011).
  • [7] J.W. Ekin, Filamentary A15 Superconductors (Plenum Press, New York, 1980) p.187.
  • [8] A. Godeke et al., Supercond. Sci. Technol. 19, R100 (2006).
  • [9] A. Godeke et al., Rev. Sci. Instrum. 75, 5112 (2004).

This paper may be cited as follows:

Kazuya TAKAHATA, Hitoshi TAMURA, Toshiyuki MITO, Shinsaku IMAGAWA and Akio SAGARA, Plasma Fusion Res. 8, 2405008 (2013).