Intense and Short Pulse Electric Field (DC and Microwave) Air Breakdown Parameters

Abstract
Experimental data for the drift velocity and Townsend ionization coefficient in N2 and O2 are utilized to obtain the ionization rates in N2, O2 and air. These rates are given over a wide range of E/p and differ from those of Felsenthal and Proud at high E/p because of the draft velocity dependence on E/ p. Felsenthal and Proud assume a linear dependence on E/p while experimentally, especially at high E/p, this dependence varies as square root of E/p. The developed rates agree well with recent experimental short pulse air breakdown data and are recommended for use in high power microwave (short pulse) air breakdown and propagation calculations.

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