An Experimental Study of the Density of Cryodeposited Surfaces
The formation of vacuum by condensation of gas particles on a cold surface (cryopumping) has received considerable attention as a high-capacity low-ultimate-pressure pumping technique. The physical properties of the condensed phase (cryodeposit) are necessary design criteria in many applications. Radiative properties are particularly important because of their influence’ on the thermal aspects of space simulation chambers. For this reason a number of investigations of these characteristics have been completed [1–6]. One property which has not been systematically investigated until recently is the density of the cryodeposit . This parameter is of special significance because of the influence of thickness on the radiative properties.
KeywordsTest Section Liquid Nitrogen Temperature Radiative Property Outer Tube Cold Surface
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