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Ultra-thin A15 composite wires with a diameter of 0.03 –0.05 mm are being developed by NIMS. Since the bending strain is approximately proportional to the wire diameter, a cable composed of thin wires can be bent to a smaller bending diameter without the degradation of Ic. Thus, react-and-wind cables with ultra-thin Nb3Sn wires are expected to be realized. A tensile test was conducted for a twisted cable with 19 0.05-mm-thick wires at room temperature to confirm whether the mechanical strength of the twisted cable can be predicted from that of the single wire. The stress tolerance of the single wire and twisted cable was assessed by measuring Ic at 4.2 K after applying various uniaxial tensile loads at room temperature. The tensile stress limit of Ic was compared between the single wire and twisted cable.

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Keyword: Nb3Sn, 極細線, 引張試験, 臨界電流

Date published: 2024-01-18

Publisher: Institute of Electrical and Electronics Engineers (IEEE)

Journal:

• IEEE Transactions on Applied Superconductivity (ISSN: 10518223) vol. 34 issue. 5 p. 1-5

Funding:

• Grants-in-Aid for Scientific Research A 21H04477

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5296

First published URL: https://doi.org/10.1109/tasc.2024.3355355

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Updated at: 2025-01-27 09:21:04 +0900

Published on MDR: 2026-01-18 08:20:40 +0900