Development and Testing of HTS Coil With Ceramic Coated REBCO Conductor for High Radiation Tolerance

High temperature superconductors (HTS) are being considered for use in future accelerator projects where they will be subjected to high levels of radiation. Development of coated conductor HTS magnets has been undertaken at the High Energy Accelerator Research Organization (KEK). This paper presents the fabrication and testing of seamless double pancake racetrack-type HTS coils wound with EuBCO tape coated with a ceramic insulation material which has a higher radiation tolerance than organic materials. The coils are instrumented with voltage taps and Hall sensors, and an excitation test at 77 K in self-field was completed. The preparation for excitation tests in the background field (∼ 10 T) are currently in progress at Brookhaven National Laboratory (BNL).