Effect of Collisional Energy Loss on Ionization Growth in H2

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Abstract
A model is studied for the growth of ionization in H2 gas with a constant electric field. The model includes a feature that stipulates an electron loses a fixed energy per collision with an H2 molecule, independent of the electron energy. Exact solutions are obtained for the time‐growing part of the electron distribution function, averaged over velocity orientation, for the case that zero‐energy electrons are uniformly supplied through all space at time zero. It is argued that this model provides a reasonable description of physical reality for E/P > ∼200.

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