| 摘要 |
PROBLEM TO BE SOLVED: To provide a cryogenic dewar bottle having the selectable substantially uniform storage temperature. SOLUTION: This invention has an inside tank 44 surrounded by an outside shell 42, and is characterized by vacuously insulating a space 46 between these. For example, a pressure vessel 60 including a cryogenic liquid coolant such as liquid nitrogen, is at least partially arranged inside the dewar bottle 40 for cooling a coolant. The pressure vessel 60 is pressurized so that the temperature of a cryogenic liquid can be controlled. A cooler and a temperature or pressure sensor communicate with the cryogenic liquid in the pressure vessel 60. When the sensor detects that the temperature of the cryogenic liquid is warmed by exceeding a predetermined level, the cooler is automatically operated for cooling the cryogenic liquid in the pressure vessel 60. COPYRIGHT: (C)2006,JPO&NCIPI
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