Photoelectron Currents and Fields in Air-Filled Cavities

A model has been developed to facilitate the calculation of electron transmission currents and potentials generated in partially gas-filled enclosures as a result of photon irradiation. The significance of the presence of air or any ionizable gas in modifying electron transmission currents and potentials is emphasized in the analysis. A computer code has been developed to perform detailed calculations. The parametric variations of transmitted current and potential as a function of pressure, gap spacing, time, pulse shape, and incident intensity are illustrated by representative calculations.