Patent ID: 7288715

Claim:
A high-vacuum-maintaining structure of a superconducting cable, including spacers disposed between inner and outer metal tubes of the superconducting cable for spacing them by a prescribed gap, wherein each spacer includes one or more layers of meshed nets, a plurality of recipients attached to said one or more layers of meshed nets and spaced apart from one another by a prescribed distance, and a gathering material which is received in said recipients to attach to said meshed nets and is used for adsorbing residual gas between the inner and outer metal tubes; and the inner and outer metal tubes are in the form of corrugated tubes, and recipients used to receive the gathering material are sized so that the respective recipients are larger than a corrugation pitch of the corrugated inner and outer metal tubes so as not to be buried in a groove on the corrugated inner and outer metal tubes, and are arranged so that said prescribed distance is equal to two to twenty times the corrugation pitch.