Current-carrying capability of the 100 kA-class HTS STARS conductor for the helical fusion reactor FFHR-d1

Y. Terazaki, N. Yanagi, S. Ito, S. Hamaguchi, H. Tamura, T. Mito, H. Hashizume, A. Sagara

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)


A 100-kA-class conductor using REBCO high-temperature superconductor (HTS) is proposed as one of the conductor options for the helical coils of the LHD-type helical fusion reactor FFHR-d1. We named it STARS (Stacked Tapes Assembled in Rigid Structure) conductor. Current carrying capability of such a simply-stacked tape conductor is an important issue. We fabricated and tested a 100-kA class STARS prototype conductor sample to verify whether a premature quench occurs. The conductor sample is a one-turn short-circuit coil with a race-track shape having a bridge-type mechanical lap joint. The transport current of the sample was induced by changing the external magnetic field, and the critical current of the sample was measured. A numerical analysis of the critical current is being performed by self-consistently solving the spatial distributions of the current density and magnetic field among the tapes to verify the measured critical current of the samples.

Original languageEnglish
Article number012099
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2017 Jul 26
Event29th International Symposium on Superconductivity, ISS 2016 - Tokyo, Japan
Duration: 2016 Dec 132016 Dec 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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