Plasma and Fusion Research
Volume 17, 2405006 (2022)
Regular Articles
- 1)
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan
- 2)
- The Graduate University for Advanced Studies, SOKENDAI, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan
Abstract
High-temperature superconducting (HTS) conductor is a feasible candidate to make magnets for the next generation fusion devices because of its higher temperature margins and higher critical current in a high magnetic field in comparison to low-temperature superconducting (LTS) conductors. The recently proposed concept of the HTS-WISE (Wound and Impregnated Stacked Elastic tapes) conductor was studied to clarify its characteristics under certain magnetic fields. The WISE conductor, including 30-stacked REBCO (Rare-Earth Barium Copper Oxide) tapes, was fabricated and energized in a 9-T test facility which produced the condition of magnetic field B = 5 - 8 T and a temperature T = 30 - 50 K. Obtained critical currents (5.4 - 10.8 kA) increased with a decreasing magnetic field and/or temperature under the condition of T > 40 K. The maximum current of 16.9 kA was obtained at T = 30 K, which corresponded to the engineering current density jE = 60 A/mm2. Experimental results showed qualitative agreement with numerical calculations of the critical current. We confirmed the operation of the WISE conductor under a high magnetic field and low temperature.
Keywords
HTS, REBCO, helical fusion reactor, WISE
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References
- [1] D.C. Larbalestier et al., Nat. Mater. 13, 375 (2014).
- [2] M. Leghissa et al., Physica C 372-376, 1688 (2002).
- [3] J.D. Weiss et al., Supercond. Sci. Technol. 30, 014002 (2017).
- [4] N. Yanagi et al., Nucl. Fusion 55, 053021 (2015).
- [5] T. Mito et al., IEEE Trans. Appl. Supercond. 31, 4202505 (2021).
- [6] S. Matsunaga et al., IEEE Trans. Appl. Supercond. 30, 4601405 (2020).
- [7] J. Miyazawa et al., Nucl. Fusion 61, 126062 (2021).
- [8] S. Ito et al., Fusion Eng. Des. 146, 590 (2019).
- [9] H. Tamura et al., Fusion Eng. Des. 89, 2336 (2014).
- [10] Y. Terazaki et al., IEEE Trans. Appl. Supercond. 24, 4801305 (2014).
- [11] Y. Terazaki et al., IEEE Trans. Appl. Supercond. 25, 4602905 (2015).