An initial magnet experiment using high-temperature superconducting STAR® wires
| Autor: | Xiaorong Wang, Timothy J Bogdanof, Paolo Ferracin, William B Ghiorso, Stephen A Gourlay, Hugh C Higley, Janakiram Kaushal Kadiyala, Soumen Kar, Reginald Lee, Linqing Luo, Maxwell A Maruszewski, Robert Memmo, Cory S Myers, Soren O Prestemon, Jithin Sai Sandra, Venkat Selvamanickam, Reed Teyber, Marcos Turqueti, Yuxin Wu |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Superconductor Science and Technology. 35:125011 |
| ISSN: | 1361-6668 0953-2048 |
| Popis: | A dipole magnet generating 20 T and beyond will require high-temperature superconductors such as Bi2Sr2CaCu2O 8 − x and REBa2Cu3O 7 − x (RE = rare earth, rebco). Symmetric tape round (star®) wires based on rebco tapes are emerging as a potential conductor for such a magnet, demonstrating a whole-conductor current density of 580 A mm−2 at 20 T, 4.2 K, and at a bend radius of 15 mm. There are, however, few magnet developments using star® wires. Here we report a subscale canted cos θ dipole magnet as an initial experiment for two purposes: to evaluate the conductor performance in a magnet configuration and to start developing the magnet technology, leveraging the small bend radius afforded by star® wires. The magnet was wound with two star® wires, electrically in parallel and without transposition. We tested the magnet at 77 and 4.2 K. The magnet reached a peak current of 8.9 kA, 78% of the short-sample prediction at 4.2 K, and a whole-conductor current density of 1500 A mm−2. The experiment demonstrated a minimum viable concept for dipole magnet applications using star® wires. The results also allowed us to identify further development needs for star® conductors and associated magnet technology to enable high-field rebco magnets. |
| Databáze: | OpenAIRE |
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