{HU 3{B He-{hu 4{b He Dilution refrigerator

摘要

A 3He-4He dilution refrigerator is provided with two interconnected mixing chambers arranged at different levels. One end of a superleak opens into concentrated 3He contained in the upper mixing chamber, while the other end opens into a portion of the apparatus containing dilute 3He for the supply of superfluid 4He, via the superleak, to the upper mixing chamber under the influence of the osmotic differential pressure prevailing across the superleak.