Abstract

A review of recent theoretical calculations of electron thermalization in gases is presented in comparison with experimental measurements. A Fokker-Planck approach to electron relaxation in inert gas moderators is discussed with attention given to a transient negative mobility effect first predicted from theoretical calculations and then observed experimentally. Additional work on electron attachment to electronegative gases and transient microwave electron conductivity is also summarized. A detailed comparison of the explicitly time dependent calculations based on the Fokker-Planck equation with the time independent electron degradation theory based on the Spencer-Fano equation is presented.

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