The influence of vacuum specific time constants on thermal desorption experiments

Abstract

A method is described in which the temperature shift in the maxima of thermal desorption transients due to vacuum-related effects can be evaluated. Is is applied to finite pumping speed and finite conductance corrections to the desorption peak temperatures. Particularly simple expressions are found for the temperature shift in lowest order and are seen to be applicable whenever the measured desorption transient (p or dp/dt) closely approximates the sample desorption rate (dns/dt).