| 摘要 |
PURPOSE:To prevent the characteristics of an oxide superconductor from being deteriorated by making water content adhere on the superconductor. CONSTITUTION:The interior of a cylindrical container 221A, in which an oxide superconductor 222 is housed, of a low-temperature side lead 22A is held in a vacuum state, whereby when a superconducting device is stopped its operation after being operated, the normal-temperature air flows in the container 221A and waterdrops are not generated on the surface of the superconductor 222 of a cryogenic temperature of 100 deg.K or lower. As a result, the characteristics of the superconductor 222 are never deteriorated. Moreover, an intermediate connection fitment 20A is provided with a refrigerant piping 202 for injecting a refrigerant from the outside and circulating holes 201A for connecting this piping 202 with a hollow part 233 of a high-temperature side lead 23, whereby the fitment 20A can be cooled at a temperature, which is required for maintaining the superconductor 222 in a superconductive state, and a circulating path, through which helium gas 41 required for cooling the lead 23 is made to pass, can be secured. |
