A 6-around-1 cable using high-temperature superconducting STAR ® wires for magnet applications,Superconductor Science and Technology

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A 6-around-1 cable using high-temperature superconducting STAR ® wires for magnet applications
Superconductor Science and Technology ( IF 3.6 ) Pub Date : 2024-02-02 , DOI: 10.1088/1361-6668/ad20fb
Nathaly Castaneda , Paolo Ferracin , Cyrus Funkhouser , Eduard Galstyan , Hugh C Higley , Sri Ram Korupolu , Goran Majkic , Hoang Nguyen , Soren O Prestemon , Venkat Selvamanickam , Huy Truong , Xiaorong Wang

To generate a dipole field above 20 T, we need high-temperature superconductors, including REBa₂Cu₃O

7−x

(RE = rare earth, rebco) coated conductors. However, the optimal architecture of a high-current flexible rebco cable is not yet settled for high-field magnet applications. Here we report a 6-around-1 cable concept based on the high-temperature superconducting star ^® wires. We made two cable samples. One had a single star ^® wire and the other had six star ^® wires. The cable with six star ^® wires was 1.5 m long. It had a diameter of 5.7 mm and a pitch length of 52 mm. The critical current of the cable before bending was 1448 A at 77 K, retaining at least 77% of the total critical current from individual star ^® wires. The cable had a low n value around 4.5. At a bend radius of 30 mm, the critical current and n value remained the same as before bending. The total resistance of electrical terminations was 61 nΩ at 77 K. The flexible and transposed 6-around-1 star ^® cable can provide another route toward practical rebco conductors for high-field accelerator and fusion magnet applications.

更新日期：2024-02-02

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