[Table of Contents]

Plasma and Fusion Research

Volume 10, 3405067 (2015)

Regular Articles

Measurement of Strands Location and Inter-Strand Contact Resistance in a CIC Conductor
Takanori MATSUDA, Tsuyoshi YAGAI, Hidetoshi KUDO, Kazuki YOSHIDA, Tetsuhiro OBANA1) and Hironori MURAKAMI2)
Sophia University, Tokyo 102-8554, Japan
1)
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
2)
Japan Atomic Energy Agency, Ibaraki 319-1184, Japan
(Received 10 December 2014 / Accepted 9 April 2015 / Published 27 July 2015)

Abstract

The cable-in-conduit (CIC) conductor is the most popular one for high-field magnets installed in fusion devices. The conductor is made of hundreds of superconducting thin strands in multi stage twisted sub-cables. In spite of the current imbalance among strands resulting in degradation of conductor Ic, precise analysis of current distribution of each strand has not been done yet. In this study, we measured the strand locations and inter-strand resistance distributions which affect the current imbalance for the full-size conductor. We have investigated the resistances theoretically by using tribological analysis. It indicated that the resistance did not depend upon nominal length of distributed contact and showed the values varied by two orders of magnitude.

Keywords

super conductor, strand location, contact resistance, cable-in-conduit conductor, JT-60SA

DOI: 10.1585/pfr.10.3405067

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References

  • [1] K. Yoshida et al., Physica C 470, 1727 (2010).
  • [2] K. Kizu et al., IEEE Trans. Appl. Supercond. 18, no.2, 212 (2008).
  • [3] K. Nakamura et al., IEEE Trans. Appl. Supercond. 21, no.3, 2016 (2011).
  • [4] H. Murakami et al., IEEE Trans. Appl. Supercond. 20, no.3, 512 (2010).
  • [5] T. Ando et al., J. Cryo. Soc. Jpn. 22, 367 (1987).
  • [6] J.A. Greenwood, Proc. R. Soc. London A 393, 133 (1984).
  • [7] J.A. Greenwood and J.B.P. Williamson, Proc. R. Soc. London A 295, 300 (1966).
  • [8] R. Buczkowski and M. Kleiber, Comput. Methods Appl. Mech. Eng. 169, 43 (1999).
  • [9] T. Yagai et al., IEEE Trans. Appl. Supercond. 24, no.3, 8800404 (2014).

This paper may be cited as follows:

Takanori MATSUDA, Tsuyoshi YAGAI, Hidetoshi KUDO, Kazuki YOSHIDA, Tetsuhiro OBANA and Hironori MURAKAMI, Plasma Fusion Res. 10, 3405067 (2015).