Speaker
Description
High-temperature superconducting (HTS) closed-loop magnet composed of gourd-shaped RE-Ba-Cu-O (REBCO, RE is rare earth) plates is potential for persistent current mode (PCM) with magnetic flux amplification and accumulation under field-cooling magnetization. Preliminary experiments and simulations confirm that the configuration can trap substantial magnetic fields, potentially exceeding 20 T in PCM. However, partially coupled self- and mutual inductances between adjacent superconducting loops may affect overall flux amplification by altering the induced current distribution and final magnetic flux density, highlighting the need for further exploration to achieve higher fields. In this study, experimental measurements and numerical modeling were employed to elucidate the mechanism of partial inductive coupling and to quantify its impact on trapped magnetic fields and the stability. Furthermore, an extended structural arrangement was proposed and validated using finite element methods, confirming its capacity in trapping higher magnetic fields. This work lays a foundation for optimizing excitation approaches and stacking configurations in HTS REBCO magnets, thereby advancing more robust and scalable high-field superconducting magnet designs for high-field applications in PCM.
