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....
ReBCO tapes and cables are of great interest high field magnets because of their high current carrying capability, high Tc, and high magnetic field tolerance. The magnetization and AC loss properties of ReBCO tapes are well known, however, for cables, especially the helically wound counterparts some interesting aspects remain. It is well known that for ReBCO tape the losses are strongly...
High-Temperature Superconductors (HTS), particularly Rare-earth Barium Copper Oxide (ReBCO) tapes, offer the most promising path towards developing high-field magnets for fusion machines, meeting stringent requirements for high operating currents, current densities, and compact coil geometries. The high tolerance of ReBCO to the tensile strength and compressive strain lead to the development...
A Spiral Copper-plated Striated Coated-conductor (SCSC) cable is a round cable composed of striated REBCO coated-conductors (CCs) wrapped around a metal core wire. A REBCO film in each CC is divided into multifilaments by laser-striation, while Cu-plating surrounds the whole cross-section. Thanks to this structure, SCSC cables are promising for application to accelerator magnets since the...
PSALM (Patterned Superconductors for AC Loss Minimisation) is a latest developed concept of high-current and low-loss HTS cables for high-power AC applications. In this work, samples of PSALMs with single superconducting layer are manufactured, tested, modelled, and analysed. In the experiments, the critical current degradation and the transport AC losses are measured. In the simulation, with...
Bi-2212 conductors and accelerator magnets have been advanced in the USA through a collaboration between US national labs, university, and wire industry connected by the US Magnet Development Program (MDP) and by recently the U.S. Department of Energy’s Accelerator R&D and Production (ARDAP) Office. For example, a high engineering critical current density of 1000 A/mm2 has been demonstrated at...
