Current leads adapted for use with superconducting coil and formed of functionally gradient material
AssigneeThe Director-General of the National Institute of Fusion Science
InventorsSataro Yamaguchi, Kotaro Kuroda
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Abstract
Current leads are used for connecting a power supply placed in a room-temature environment and a superconducting coil placed in an ultralow-temperature environment. The current leads includes a first current lead and a second current lead. The first current lead is made up of a room-temperature N-type thermoelectric semiconductor, a low-temperature N-type thermoelectric semiconductor, and a high-temperature superconductor. The second current lead is made up of a room-temperature P-type thermoelectric semiconductor, a low-temperature P-type thermoelectric semiconductor, and a high-temperature superconductor. At least one of the first and second current leads is formed of a functionally gradient material.
Claims4
Current leads comprising a first current lead and a second current lead connecting a power supply placed in a room-temperature environment and a superconducting coil placed in an ultra-low-temperature environment so as to form a current circuit wherein a current from the power supply flows through the first current lead, the superconducting coil and the second current lead and returns to the power supply, wherein:
- said first current lead comprises:
- a room-temperature N-type thermoelectric semiconductor selected from the group consisting of Bi.sub.2 Te.sub.3 including an N-type dopant and (BiSb).sub.2 Te.sub.3 including an N-type dopant,
- a low-temperature N-type thermoelectric semiconductor consisting of BiSb with an N-type dopant, and
- a Bi--Sr--Ca--Cu--O-based high-temperature superconductor;
- and
- said second current lead comprises:
- a room-temperature P-type thermoelectric semiconductor selected from the group consisting of (BiSb).sub.2 Te.sub.3 including a P-type dopant and (L3iSb).sub.2 Te.sub.3 including a P-type dopant,
- a low-temperature P-type thermoelectric semiconductor consisting of BiSb with an N-type dopant, and
- a Bi--Sr--Ca--Cu--O-based high temperature superconductor.
Dependencies are inferred from the claim text.