Upper bound to the pressure in an elementary vacuum system
Abstract
A vacuum system consisting of a volume V, a pump S and a surface area A on which there are initially adsorbed n(0) molecules in a first order desorption state is considered and discussed. The essential result is that P/sub max/ = 1.146 x 100,000 A/St torr is expected to provide a reasonably accurate estimate for the value the pressure should be strictly less than t seconds after the pumping has started given that the pressure in the system is due to an adsorbed surface phase. Experimental tests of this relation have been performed and comparisons are made between this result and the pressure measured in an elementary vacuum system.
 Publication:

Presented at 23d Natl. Vacuum Symp
 Pub Date:
 1976
 Bibcode:
 1976avs..symp...21E
 Keywords:

 Molecular Absorption;
 Pumps;
 Vacuum Systems;
 Desorption;
 Pressure Gradients;
 Research And Development;
 Engineering (General)