Construction and demonstration of universal joint techniques for realization of a remountable high-temperature superconducting magnet

为了实现万向节技术在可拆卸高温超导磁体上的应用，我们进行了这项研究。我们的研究目标是：1)建立万向节技术；2)利用多孔介质优化冷却系统；3)设计和制造大型导体及其接头。在冷却系统的研究中，我们证实了金属多孔介质可以抑制膜沸腾，这意味着该系统适用于可拆卸磁铁。此外，我们还制作了具有机械连接部分的大型导体，并实现了100 kA的电流。基于上述结果，我们展示了联合技术的概念和可拆卸的高温超导磁体。

We conducted this research aiming for realization of universal joint techniques to be applied to a remountable high-temperature superconducting magnet. We set three objectives in this research: 1) Establishment of universal joint techniques, 2) Optimization of cooling system using porous media and 3) Design and fabrication of a large-scale conductor and its joint. In the research of the cooling system, we confirmed that metal porous media can suppress film boiling and the fact implies that the system is suitable for the remountable magnet. In addition, we fabricated a large-scale conductor having mechanical joint section and achieved a current of 100 kA. Based on the above results, we demonstrated the concept of joint techniques and a remountable high-temperature superconducting magnet.