| 摘要 |
The liquid helium circulation system according to this invention is a liquid helium circulation system capable of recycling helium gas evaporating inside its liquid helium reservoir to said reservoir. This system has a liquid helium reservoir 1 and refrigerator 5 where helium gas boil-off recovered from said reservoir is refrigerated and liquefied, and is designed to have the helium gas refrigerated or liquefied with said refrigerator returned to said reservoir. Said system is equipped with line 9c that supplies high-temperature helium gas heated up inside said liquid helium reservoir to said refrigerator, where said helium gas is made into refrigerated helium gas, and supplies the refrigerated helium gas to the upper part inside said reservoir, lines 9b and 9a that supply low-temperature helium gas in the vicinity to the surface of liquid helium inside said liquid helium reservoir to said refrigerator, where said low-temperature is liquefied, and supply the liquefied helium to said reservoir. <IMAGE> |
