Accession Number : AD0775088

Title :   Electron Transport in a Dilute Weakly Ionized Gas Application to a Model Ionosphere.

Descriptive Note : Environmental research papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Jasperse,John R.

Report Date : 27 SEP 1973

Pagination or Media Count : 53

Abstract : The author presents a kinetic model for the electron distribution function in micro-space in a dilute, nonuniform, weakly ionized gas. The model includes photoproduction of electron-ion pairs, electron-ion recombination, and elastic, inelastic, and ionizing electron-neutral collisions. Under special conditions exact solutions are found for the steady-state electron velocity spectrum in a uniform, infinite medium for a delta-function photon energy source, and for an exponentially decreasing photon energy source. Also presented is a general method for finding the electron distribution function in a plane-parallel medium where the neutral gas density varies exponentially with position. The method is applied to give an approximation to the electron-ion concentration, the electron-ion drift velocity, and the electron temperature for a model ionosphere at altitudes where the assumption of weak ionization is valid. (Author)

Descriptors :   *Ionosphere, *Atmosphere models, Ionized gases, Electron transport, Atmospheric chemistry

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE