Cryogenic Cooling by Noncondensible-Gas Injection.
Temperature control of various cryogenic liquids in the range from their boiling points to near or below their freezing points has been achieved by injecting a noncondensing gas, helium. The process is more easily accomplished than the usual vapor-pumping technique and is applicable in the range from 15 degrees to 300 degrees K. Interesting ice formations were observed in liquid argon.
Lytle
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Stoner
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