Butt jointing performance for remountable HTS magnet by improving contact surface condition

Satoshi Ito, Hidetoshi Hashizume, K. Yuki, S. Takami, Y. Yamamoto

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


The remountable HTS magnet, which can facilitate the fabrication of the magnet itself and the replacement of failed parts and of inner structural component, was proposed by the authors, especially for helical reactors and Spherical Tokamak. Through the previous researches, it has been clarified that the butt joint of HTS cable is a suitable joint method for the remountable magnet. In this study, the butt jointing performance of BSCCO 2223 cable is evaluated when the contact surface is metal-electroplated or coated with nano-carbon particles. The results show that electroplating of silver can reduce the joint resistance. The joint resistance obtained by this experiment is small enough to prevent significant resistance increase below 500 A. It is proved that the HTS cable has enough robustness against heat generation in the butt joint under liquid nitrogen temperature below 500 A, which shows future feasibility of the remountable HTS magnet.

Original languageEnglish
Pages (from-to)1491-1496
Number of pages6
JournalFusion Engineering and Design
Issue number8-14 PART B
Publication statusPublished - 2006 Feb 1
EventProceedings of the Seventh International Symposium on Fusion Nuclear Technology ISFNT-7 Part B -
Duration: 2005 May 222005 May 27


  • Butt Joint
  • HTS cable
  • Remountable HTS magnet

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering
  • Civil and Structural Engineering
  • Mechanical Engineering


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