Numerical simulation of the dynamics of current channel microstructure formation in atmospheric nanosecond discharges in a uniform electric field |
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Authors: | A A Tren’kin |
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Institution: | 1.Russian Federal Nuclear Center,All-Russia Research Institute of Experimental Physics (VNIIEF),Sarov, Nizhni Novgorod oblast,Russia |
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Abstract: | The results of simulation of the current channel microstructure formation in atmospheric nano- second discharges in a uniform
electric field due to the development of instability of the ionization process in the avalanche stage followed by cycling
breakdowns of the avalanche are considered. It is shown that the enhancement of the electric field at the ionization front
due to the intrinsic field of the avalanche leads to the contraction of the path length between consecutive avalanche breakups;
after several breakups, the ionized gas passes to the plasma state. The effect of small electric field perturbations on the
dynamics of microstructure formation is investigated; as a result, the possibility of “induced” avalanche breakup at the instant
of action of perturbations is established. |
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Keywords: | |
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