Abstract
The microwave conductivity of electrons in partially ionized helium gas is studied with the Fokker-Planck equation and characterized by quasi-steady field. The calculated time-dependent conductivity agrees better with the experimental results of Warman and de Haas (J. Chem. Phys. 63 (1975) 2094) than that reported by Koura (J. Chem. Phys. 84 (1986) 6227). For P = 760 Torr, T = 295 K, microwave frequency 8.84 GHz, electric field strength 4.4 V cm −1, and an initial δ-function electron distribution at 0.864 eV, the time for the conductivity to decay to within 10% of the thermal value was calculated to be 54 ns whereas the experimental value is 50 ns.
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