Superconductivity & Particle AcceleratorS 2026

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 magnets. REBCO tapes made by our Advanced Metal Organic Chemical Vapor Deposition (MOCVD) method have yielded critical current over 1830 A/4-mm-width at 4.2 K, 20 T in short samples and over 1,270 A/4-mm-width in 50-m-long tapes, which is 3x that of typical commercial tapes. We have demonstrated round, 2.5 mm diameter REBCO STAR® wires with a Je of about 600 A/mm2 at 4.2 K, 30 T at a bend radius of just 15 mm, using high critical current REBCO tapes. Prototypes of insert coils for high-field magnets are being demonstrated with our REBCO STAR® wires and cables. 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 being developed to withstand the high transverse stresses experienced in high-field magnets. We are also developing neutron irradiation resilient REBCO tapes for compact fusion applications.
Recent progress in the development of our high-performance REBCO conductors and cables will be presented.