| 摘要 |
PURPOSE:To reduce penerated heat into a liquid helium container without setting any limitation in the arrangement in a superconductive device by providing a high temperature superconductive material not in a gas pipe but directly in vacuum. CONSTITUTION:A liquid nitrogen container 10 is arranged beside a liquid helium container 2. A gas pipe which is a flow path of gas helium is not provided and a lead part 9b using a high temperature superconductive material is arranged on its side in vacuum. A low temperature end of a high temperature superconductive material is connected to a superconductive coil side terminal 6 passing through a sidewall of the liquid helium container 2 and a high temperature end is connected to an intermediate connection part 11 passing through a sidewall of a liquid nitrogen container 10. Since a low temperature end of a lead part 9b using a high temperature superconductive material is in liquid helium 3 and a high temperature end thereof is in liquid nitrogen 8, it becomes liquid nitrogen temperature or lower due to conduction even if in vacuum, not in a flow path of gas helium, thereby keeping a superconductive state. Furthermore, since there is no gas pipe which is communicated as far as a normal temperature space, heat penetration due to heat conduction does not also exist. |
