It is significantly difficult to develop a superconducting joint between REBCO and low-temperature superconductors (LTS) using a solder matrix replacement technique. This is because the REBCO superconducting layer is highly corrosive to Sn. In this work, TEM observations were first conducted on the reaction interface between the REBCO layer and Sn to reveal the reaction. Then, a new idea to create a compact low-resistance joint to reduce the joint resistance between REBCO and LTS was proposed. In this method, the REBCO tape is rolled in a metal boat, with the Cu stabilizer remaining around the tape. Then, an LTS wire, whose superconducting filament ends are coated with a superconducting solder, is set straight into a boat. Then, the boat is filled with a superconducting solder, so that the joint state between the LTS and superconducting solder matrix remains superconductive. However, the electrical joint between the REBCO tape and the solder matrix is resistive, even if the sold...

中文翻译：

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开发紧凑的接头结构以降低高温超导体（HTS）和低温超导体（LTS）之间的接头电阻的新概念

使用焊料基体替代技术在REBCO和低温超导体（LTS）之间开发超导接头非常困难。这是因为REBCO超导层对Sn具有高度腐蚀性。在这项工作中，首先在REBCO层和Sn之间的反应界面上进行TEM观察以揭示反应。然后，提出了一种创建紧凑的低电阻接头以减小REBCO和LTS之间的接头电阻的新思路。在这种方法中，REBCO胶带在金属舟皿中滚动，而铜稳定剂保留在胶带周围。然后，将其超导细丝末端涂有超导焊料的LTS导线直接放入船中。然后，在船上装满超导焊料，因此LTS和超导焊料基体之间的结合状态保持超导。但是，即使已售出，REBCO胶带和焊料基质之间的电连接也是电阻性的。