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

29th International Symposium on Superconductivity

Terazaki, Y.^1 ; Yanagi, N.^1,2 ; Ito, S.^3 ; Hamaguchi, S.^2 ; Tamura, H.^2 ; Mito, T.^1,2 ; Hashizume, H.^3 ; Sagara, A.^1,2

SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi-cho, Toki

509-5292, Japan^1

National Institute for Fusion Science, 322-6 Oroshi-cho, Toki

509-5292, Japan^2

Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University, 6-6-01-2 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi

980-8579, Japan^3

关键词: Bridge-type;    Current carrying capability;    External magnetic field;    Helical coil;    High temperature superconductor (HTS);    Race tracks;    Stacked tape;    Transport currents;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/871/1/012099/pdf
DOI  :  10.1088/1742-6596/871/1/012099

来源: IOP

【 摘 要 】

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.