Mathematical Model for a Group of Electrons Drifting Between Plane Parallel Electrodes

Abstract

A mathematical model for a group of electrons drifting in a gas in a uniform electric field is proposed. The relevance of this model for the assessment of the errors that arise from forward and backward diffusion to anode and cathode in time of flight measurements of drift velocity is discussed. The theory of steady streams from pole and dipole sources is related to that of the travelling group.