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本文介绍的是一种蒸发型制冷机,其液体He~3或He~4上部的蒸汽抽空是通过两个交替工作的吸附泵来实现的。这样最多用10升氦蒸汽就能在较长的时间里使温度保持不变,其准确度达0.003K。它的制冷量也已确定。 通过吸附泵和抽气管路使He~3循环也计算出了稀释制冷机的特性(He~3的循环率、起动和工作温度)。 这个系统表明,在He~3的循环率达10~(-5)—10~(-4)克分子/秒时生产极低温是成功的。
This article describes an evaporative refrigerator, the liquid He ~ 3 or He ~ 4 upper part of the evacuation of the vacuum is through two alternately working adsorption pump to achieve. This up to 10 liters of helium steam will be able to maintain the same temperature over a long period of time, the accuracy of 0.003K. Its cooling capacity has also been set. The characteristics of the dilution chiller (He ~ 3 cycle rate, start-up and operating temperature) were also calculated for the He ~ 3 cycle by the suction pump and the suction line. This system shows that it is successful to produce very low temperatures at a He ~ 3 circulation rate of 10 ~ (-5) -10 ~ (-4) mol / s.