Speaker
Description
REBCO conductors with high critical currents and high engineering current densities (Je) in magnetic fields of 20 T and above are needed for several applications such as particle accelerators and fusion reactors. We have demonstrated round, 2.5 mm diameter REBCO STAR® wires with a Je of about 600 A/mm^2 at 4.2 K, 30 T at a bend radius of just 15 mm, using high critical current REBCO tapes. These tapes are produced in lengths of 50 meters with critical currents at 4.2 K, 20 T that are 3x that of typical commercial tapes. Defect-tolerant features have been incorporated in our REBCO tapes that enable better current sharing and quench stability. REBCO tapes with a higher delamination strength are also being developed to withstand the high transverse stresses experienced in high-field magnets. Prototypes of insert coils for high-field magnets are being demonstrated with our REBCO STAR® wires and cables. The recent progress in the development of our high-performance REBCO conductors and cables will be presented.
This work was supported by Small Business Innovative Research (SBIR) awards DE-SC0021689, DE-SC0022900, DE-SC0024855 from the U.S. Department of Energy Office of High Energy Physics and N68335-23-C-0228 from the U.S. Naval Sea Systems Command.
The work at LBNL was also supported by the U.S. Magnet Development Program through Director, Office of Science, Office of High Energy Physics of the US Department of Energy under Contract No. DEAC02-05CH11231.
