An initial magnet experiment using high-temperature superconducting STAR® wires

Abstract A dipole magnet generating 20 T and beyond will require high-temperature superconductors such as Bi 2 Sr CaCu O 8 ? x REBa Cu 3 $_{7-x}$?> 7 (RE = rare earth, rebco ). Symmetric tape round ( star ®) wires based on tapes are emerging a potential conductor for magnet, demonstrating whole-conductor current density of 580 mm ?2 at T, 4.2 K, bend radius 15 mm. There are, however, few developments using ® wires. Here we report subscale canted $\cos\theta$?> cos ? an initial experiment two purposes: to evaluate the performance in configuration start developing technology, leveraging small afforded by The was wound with wires, electrically parallel without transposition. We tested 77 K. reached peak 8.9 kA, 78% short-sample prediction 1500 . demonstrated minimum viable concept applications results also allowed us identify further development needs conductors associated technology enable high-field magnets.