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High temperature superconducting cables are necessary for next-generation high-field accelerator magnets, and various types of HTS cables have been developed worldwide. We have started the development of HTS cables in which rare-earth barium copper oxide coated conductors are spirally wound around a flexible multi-wire core. In this study, we constructed five sample cables with a 2-mm-wide coated conductor and a 1.8-mm-diameter multi-wire core. The transport critical current of the coated conductors used for the sample cables was measured at 77 K and 4.2 K. At 4.2 K, the Ic was measured in a perpendicular magnetic field from 1 T to 18 T. The transport Ic and bending properties of the sample cables were characterized at 77 K.Thecable Ic degraded 10–16% due to the cable construction and 10% after bending the cable with a radius of 20mm.The cable current density at 20 T and 4.2 K was estimated as a function of the cable diameter.

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Keyword: REBCO, cable, critical current, current density, high magnetic field

Date published: 2023-12-21

Publisher: Institute of Electrical and Electronics Engineers (IEEE)

Journal:

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

Funding:

• MEXT Development of key element technologies to improve the performance of future accelerators Program JPMXP1423812204
• JSPS KAKENHI 19H01911

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5571

First published URL: https://doi.org/10.1109/tasc.2023.3345848

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Updated at: 2025-07-11 08:30:17 +0900

Published on MDR: 2025-07-11 08:16:42 +0900