Critical Current Measurements of Prototype REBCO Round Cables at 77 K
- Resource Type
- Periodical
- Authors
- Wang, X.; Tsuchiya, K.; Terashima, A.; Tanabe, S.; Negishi, N.; Kikuchi, A.
- Source
- IEEE Transactions on Applied Superconductivity IEEE Trans. Appl. Supercond. Applied Superconductivity, IEEE Transactions on. 34(5):1-5 Aug, 2024
- Subject
- Fields, Waves and Electromagnetics
Engineered Materials, Dielectrics and Plasmas
Conductors
Superconducting cables
Voltage measurement
Magnetic field measurement
Bending
Magnetic cores
Copper
REBCO
cable
critical current
current density
high magnetic field
- Language
- ISSN
- 1051-8223
1558-2515
2378-7074
High temperature superconducting (HTS) 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 (REBCO) 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 ( I c ) of the coated conductors used for the sample cables was measured at 77 K and 4.2 K. At 4.2 K, the I c was measured in a perpendicular magnetic field from 1 T to 18 T. The transport I c and bending properties of the sample cables were characterized at 77 K. The cable I c degraded 10–16% due to the cable construction and 10% after bending the cable with a radius of 20 mm. The cable current density ( J e ) at 20 T and 4.2 K was estimated as a function of the cable diameter.