Swarm Analysis by Using Transport Equations. III. Steady-State Swarm Behavior of Positive Ions in a Uniform Medium

Abstract

Steady-state behavior of a uniform swarm of positive ions has been analyzed by using transport equations. First, general transport equations for positive ions are presented and then simplified by assuming spatial uniformity. Next, the equations are applied to the case in which the electrons are absent and swarm parameters such as the drift velocity and the random energy are numerically calculated. The results are plotted and compared with already published data. Finally, dependence of the ion mobility on the electric field and the gas temperature is discussed, and some momentum transfer collision cross-sections are determined by a reversed calculation from the published mobility data.