| 摘要 |
PROBLEM TO BE SOLVED: To obtain a current lead device which reduces the infiltration of heat into a superconducting coil by suppressing the generation of Joule heat in a lead part between a radiation shield and an ordinary-temperature section, and a refrigerator-cooled superconducting magnet. SOLUTION: A current lead is composed of a oxide-based superconductor lead 11 between a superconducting coil 2 and a radiation shield 20 and a composite/material lead 15 between the shield 20 and an ordinary temperature/ temperature section. A lead 15 is manufactured by piling copper 16 and a high- temperature superconducting bulk material 17 composed of a Bi-based oxide superconducting bulk material upon another and welding the copper 16 with the material 17 by soldering. |
