Fabrication, Characterization and Modeling of a High-Temperature Superconducting Double Racetrack Coil

Abstract

This paper summarizes our work on the fabrication, characterization, and modeling of a high-temperature superconducting double racetrack (DRC) coil. Using an in-house developed winding system, a DRC was wound with ReBCO superconducting tape. The coil was first characterized under direct current to obtain its IV characteristic and its critical current. It was then characterized under alternating current (60 Hz and 120 Hz) to measure its alternating current losses (AC losses). These measurements were compared with a 3D finite element model and show reasonable agreement given the modeling assumptions. The coil exhibits good performance, did not undergo any degradation during winding, and can be used for further studies. This validates our fabrication process and our approach to superconducting coil characterization.