Abstract
A simple model of the nonequilibrium discharge in molecular gas has been developed based on the assumption that partition of heavy species is governed by the common kinetic temperature of heavy particles. The model has been used to simulate high-voltage breakdown in the post-arc column in nitrogen at a pressure of 20 atm. Axial homogeneity has been assumed and electrode effects were neglected. The initial conditions were given by the arbitrary radial distributions of the electron and heavy-particle temperatures. The electric-field impulse was applied to the column after a period of forced cooling, which lasted approximately 30 μs. The gas sustained fields of up to 18 kV cm−1 and breakdown occurred at 24 kV cm−1.
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