On the initiation of a spark discharge upon the breakdown of nitrogen and air in a nonuniform electric field |
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Authors: | V F Tarasenko E Kh Baksht A G Burachenko M I Lomaev D A Sorokin and Yu V Shut’ko |
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Institution: | 1.Institute of High-Current Electronics, Siberian Branch, Russian Academy of Sciences, Akademicheskii pr. 2/3, Tomsk, 634055, Russia ; |
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Abstract: | Switchover from a runaway-electromnduced volume discharge to a spark is studied when a nanosecond discharge is initiated in
high-pressure nitrogen an d air at a voltage of 50–250 kV. In the case of a cathode with a small radius of curvature and a
flat anode and in the presence of cathode spots, the leader of the spark channel may propagate from the flat cathode. When
the rate of rise of the voltage across centimeterwide gaps is high (dU/dt ∼ 1015 V/s or higher), cathode spots in the case of a corona discharge emerge within 200 ps. |
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