Patent ID: 7279639

Claim:
A structure jointing together superconducting cables used at cryogenic temperature, or jointing together a terminal of said superconducting cable and a normal conducting cable, the structure comprising: a joint insulation layer provided at an external circumference of a conductor connection connecting together conductors of said superconducting cables, respectively, or connecting together said conductor of said superconducting cable and a conductor of said normal conducting cable; at least a single coolant path provided at said joint insulation layer to cool said conductor connection; and a conductor connection sleeve arranged at said conductor connection and compression-connected to a radially outer surface of said conductors of said superconducting cables arranged to abut against each other or a radially outer surface of said conductor of said superconducting cable and said conductor of said normal conducting cable arranged to abut against each other; a superconducting wire provided on a radially outer surface of said conductor connection sleeve to alleviate generation of heat; wherein said coolant path has a radially inner opening along the radially outer surface of said conductor connection sleeve to allow said radially outer surface to directly contact said coolant.