Residual Gas Conduction Near Liquid-Helium Temperatures
The necessity of being able to measure thermal conduction in low-density gases experimentally is becoming very evident in space and cryogenic hardware. In these application areas, residual or low-density gas conduction often becomes the major mode of energy transfer in thermal insulation. An experimental study was therefore undertaken to examine thermal conduction in the type of environments common to cryogenic hardware. This meant devising an apparatus for measuring residual gas conduction between surfaces of finite size at temperatures near the normal boiling point of liquid helium. The following discussion is concerned with the details of the apparatus for this new method of residual-gas-conduction measurement.
KeywordsSuperconducting Transition Temperature Outer Cylinder Metal Foil Normal Boiling Point Secondary Coil
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