| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling pipe capable of reducing an amount of evaporation of helium and generation of magnetic noise, and improving an initial rise property in cooling. SOLUTION: This cooling pipe where a cold generating portion 13 of a cryogenic refrigerator 11 mounted on an upper end portion of a cylindrical vacuum container 21, is disposed in the vacuum container 21, and which is exposed to the external through a heat transfer pipe 15 forming a cold exposing portion 13 at a lower end of the vacuum container 21 in a state that a heat medium is sealed therein, comprises a high heat conductive metallic bar 22 connected with the cold generating portion 13 at its one end and cooling the heat medium through at least the other end face. COPYRIGHT: (C)2009,JPO&INPIT
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