3HE-4HE DILUTION REFRIGERATOR

摘要

A <3>He-<4>He dilution refrigerator having two chambers (1,2) accommodated at two mutually different levels, of which the uppermost (1) forms a mixing chamber for concentrated <3>He and injected superfluid (4) He. A duct (12) has its lower end opening into the top of the lower chamber (2) and its upper end in an auxiliary chamber (13) the uppermost part of which communicates (14) with the upper part of the mixing chamber (1) and the lower part communicates (15) with the lower part of the mixing chamber (1).