Development of remountable joints and heat removable techniques for high-Temperature superconducting magnets

H. Hashizume, S. Ito, N. Yanagi, H. Tamura, A. Sagara

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Segment fabrication is now a candidate for the design of superconducting helical magnets in the helical fusion reactor FFHR-d1, which adopts the joint winding of high-Temperature superconducting (HTS) helical coils as a primary option and the 'remountable' HTS helical coil as an advanced option. This paper reports on recent progress in two key technologies: The mechanical joints (remountable joints) of the HTS conductors and the metal porous media inserted into the cooling channel for segment fabrication. Through our research activities it has been revealed that heat treatment during fabrication of the joint can reduce joint resistance and its dispersion, which can shorten the fabrication process and be applied to bent conductor joints. Also, heat transfer correlations of the cooling channel were established to evaluate heat transfer performance with various cryogenic coolants based on the correlations to analyze the thermal stability of the joint.

Original languageEnglish
Article number026014
JournalNuclear Fusion
Volume58
Issue number2
DOIs
Publication statusPublished - 2018 Feb

Keywords

  • Heat transfer correlation
  • Helical fusion reactor
  • High-Temperature superconductor
  • Joint-winding
  • Mechanical joint
  • Porous media
  • Remountable HTS magnet

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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