| 摘要 |
A terminal structure of a superconducting cable is provided that is capable of preventing degradation in airtightness of a seal provided on the boundary between a room-temperature side and a cryogenic side for a long-term use. The terminal structure includes a terminal of a superconducting cable (100), a bushing (10) providing electrical conduction with a superconducting conductor (100a) of the cable (100), and a refrigerant bath (11) housing the terminal and the bushing (10). The refrigerant bath (11) includes a liquid nitrogen layer (13) in its cryogenic side and a nitrogen gas layer (14) in its room-temperature side that are adjacent to each other. In the nitrogen gas layer (14), distance t between an inner surface (11a) of the refrigerant bath (11) and an outer periphery of the bushing (10) is dimensioned such that nitrogen gas is kept in a gaseous state without being pressurized by a pressurizer and respective pressures of nitrogen gas and liquid nitrogen counterbalance each other. |
