New Methods for Approaching Absolute Zero.

Authors :: Lounasmaa, O. V.
Source :: Scientific American; Dec1969, Vol. 221 Issue 6, p26-35, 10p, 7 Diagrams, 2 Graphs
Publication Year :: 1969
Abstract: Provides information on the experimental procedures devised by physicists which are capable of lowering the temperature range accessible for research to within millidegrees of absolute zero. Explanation of the helium-3/helium-4 dilution process; Development of the Pomeranchuk method; Information on nuclear cooling; Principle and operation of the dilution refrigerator.