Summary
This paper reports an initial magnet experiment using symmetric tape round (STAR®) wires based on rare-earth barium copper oxide (REBCO) superconductors. A subscale canted cosθ dipole magnet was constructed and tested to evaluate conductor performance in a magnet configuration and to develop magnet technology leveraging the small bend radius of STAR® wires. The magnet reached 78% of predicted short-sample current capacity at 4.2 K, demonstrating the concept's viability whilst identifying further development requirements for practical high-field REBCO magnet applications.
Key measures
Peak current (8.9 kA), percentage of short-sample prediction (78%), whole-conductor current density (1500 A mm⁻²), operating temperatures (77 K and 4.2 K), magnetic field strength (20 T and beyond)
Outcomes reported
The study tested a subscale canted cosθ dipole magnet wound with STAR® wires at 77 K and 4.2 K, achieving a peak current of 8.9 kA (78% of short-sample prediction) and whole-conductor current density of 1500 A mm⁻². The experiment demonstrated feasibility of dipole magnet applications using STAR® conductors and identified further development needs for high-field REBCO magnets.
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