TERMINAL STRUCTURE FOR SUPERCONDUCTING CABLE

A terminal structure for a superconducting cable that is small and more processible is provided. A terminal structure for a superconducting cable includes a cable core exposed from an end of a heat insulation tube of the superconducting cable, a bushing through which part of the core extends, a porcelain tube accommodating a normal-temperature-side region of the bushing, a normal conducting pull-out part to which a superconducting conductor layer included in the core is connected at an end of the core that protrudes from a normal-temperature-side end of the bushing, an inside vacuum layer that is disposed so as to extend from a space between an inner circumference of the bushing and an outer circumference of the core to a normal temperature side via an inside of the porcelain tube and that holds a refrigerant for cooling the superconducting conductor layer while insulating the refrigerant from heat, a cable-side vacuum layer that is disposed so as to extend from an outer circumference of a cable-side region of the bushing to the end of the heat insulation tube, that holds the refrigerant for cooling the superconducting conductor layer while insulating the refrigerant from heat, and that is disposed so as to overlap the inside vacuum layer, and a normal-temperature-side vacuum layer that holds a refrigerant for cooling a joint between the superconducting conductor layer and the normal conducting pull-out part that is disposed outside the porcelain tube while insulating the refrigerant from heat.