Oliver, Robert Norris (1950) Experimental determination of accommodation coefficients as functions of temperature for several metals and gases. Engineer's thesis, California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-02092009-080824
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The accommodation coefficients for the gases and metals tested vary rapidly in the range where the gas temperature is within approximately 50°C of the filament temperature.
When the temperature excess becomes large, the [...] of argon, nitrogen and helium on platinum is approximately .7, .5 and .2, respectively, and on tungsten approximately .5, .35 and .15, although the actual value depends upon both filament and gas temperature.
Variation in pressure up to 150 microns was found to have a negligible effect on [...].
All gases and metals tested gave smooth curves of [...] versus temperature except helium on tungsten at a gas temperature of 80° K., which exhibited a sharp discontinuity at a filament temperature of approximately 225° K. and a pressure of 34 microns.
|Item Type:||Thesis (Engineer's thesis)|
|Degree Grantor:||California Institute of Technology|
|Division:||Engineering and Applied Science|
|Thesis Availability:||Public (worldwide access)|
|Defense Date:||1 January 1950|
|Default Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Imported from ETD-db|
|Deposited On:||10 Feb 2009|
|Last Modified:||26 Dec 2012 02:30|
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