Open AccessRadiation and gas conduction heat transport across a helium dewar multilayer insulation system
Author(s) -
M.A. Green
Publication year - 1994
Language(s) - English
Resource type - Reports
DOI - 10.2172/74104
Subject(s) - thermal conduction , cryostat , helium , heat transfer , helium gas , materials science , thermal insulation , thermodynamics , liquid helium , chemistry , mechanics , condensed matter physics , composite material , physics , superconductivity , organic chemistry , layer (electronics)
This report describes a method for calculating mixed heat transfer through the multilayer insulation used to insulate a 4 K liquid helium cryostat. The method described here permits one to estimate the insulation potential for a multilayer insulation system from first principles. The heat transfer regimes included are: radiation, conduction by free molecule gas conduction, and conduction through continuum gas conduction. Heat transfer in the transition region between the two gas conduction regimes is also included