Description
We present the design and experimental evaluation of two racetrack coils: one is wound using a Spiral Copper-plated Striated Coated-conductor (SCSC) cable developed at Kyoto University, and the other using a reference CORC®-like cable using monofilament coated conductors. In SCSC cable, the striated REBCO tapes are plated with copper and, then, wound spirally on a round core, in order to mitigate magnetization effectively while maintaining its quench stability.
This work details the coil design, termination strategies, and electromagnetic simulations. In the initial phase, using short samples, we assess the impact of epoxy impregnation on critical current degradation and thermal cycling effects. We then present the construction process in fabricating the HTS racetrack coil with epoxy filler, highlighting key design considerations and challenges. Finally, we characterize the coil’s V-I behavior and compare transport AC losses between two coils wound using the SCSC cable and the reference CORC®-like cable under triangular time-varying currents with varying time constants.
This work was supported in part by JST-ALCA-Next Program JPMJAN24G1 and in part by Japan-U.S. Science and Technology Cooperation Program in High Energy Physics.