Formation of Wide Streamers during a Subnanosecond Discharge in Atmospheric-Pressure Air |
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| Authors: | V F Tarasenko G V Naidis D V Beloplotov I D Kostyrya N Yu Babaeva |
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| Institution: | 1.Institute of High Current Electronics, Siberian Branch,Russian Academy of Sciences,Tomsk,Russia;2.Joint Institute for High Temperatures,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | Results are presented from experimental and computational studies of a subnanosecond breakdown of atmospheric-pressure air in a nonuniform electric field. It is shown that the ionization waves (streamers) formed in the prebreakdown stage have a nearly spherical or conical shape. The diameter of the streamer in its widest part is found to increase with increasing voltage and discharge gap length. For a rise time of the voltage pulse of ≈0.5 ns and its amplitude of ≈250 kV, streamers about 8 cm in diameter were observed in a 7-cm-long gap. |
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