Analysis of the photoionization chamber for arbitrary mean free path
Abstract
The photoionization chamber consists of two parallel planar electrodes and a test gas between them which is ionized by a photon beam of sufficient energy. The charged particles thus produced, diffuse to the electrodes where they recombine. The analysis uses the Lees split Maxwellian hypothesis for closing the moments of the Boltzmann equation. Conservation equations for mass, momentum and energy are obtained and solved numerically. This analysis predicts the charged specie densities, the electric field distribution and the current  voltage characteristics for arbitrary ratio of mean free path to Debye length.
 Publication:

AIAA, 13th Aerospace Sciences Meeting
 Pub Date:
 January 1975
 Bibcode:
 1975aiaa.meet.....P
 Keywords:

 Ionization Chambers;
 Mean Free Path;
 Particle Trajectories;
 Photoionization;
 Boltzmann Transport Equation;
 Charged Particles;
 Conservation Equations;
 Debye Length;
 Isotope Separation;
 Plasma Diagnostics;
 Ultraviolet Radiation;
 Instrumentation and Photography