ICCD-imaging of a plasma glow during the prebreakdown stage of nanosecond discharges at both polarities in nitrogen, air and argon D. V. Beloplotov, M. I. Lomaev, V. F. Tarasenko, D. A. Sorokin
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ArticleSubject(s): наносекундные разряды | диффузные разряды | стримеры | плазмаGenre/Form: статьи в журналах Online resources: Click here to access online
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Journal of Physics: Conference Series Vol. 927. P. 012010 (1-5)Abstract: Dynamics of a plasma glow during the prebreakdown stage of a nanosecond discharge in the «cone-to-plane» gap with length of d = 3 mm was investigated with a HSFC PRO 12-bit four-channel ICCD camera. The gap was filled with nitrogen, air, argon. Gas pressure was ranged from 12,5 to 400 kPa. Voltage pulses of negative (U = 25 kV, τ0,5 = 3 ns, τ0,1–0,9 = 0,7 ns) and positive (U = 25 kV, τ0,5 = 10 ns, τ0,1–0,9 = 3 ns) polarities were applied across the gap. Images of the plasma glow at different stages of streamer formation are presented. It was established that a diffuse discharge is formed due to formation of a large streamer. It was found that plasma appears at a certain distance from the conical electrode at both polarities. These and other features of streamer formation are discussed.
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Dynamics of a plasma glow during the prebreakdown stage of a nanosecond discharge in the «cone-to-plane» gap with length of d = 3 mm was investigated with a HSFC PRO 12-bit four-channel ICCD camera. The gap was filled with nitrogen, air, argon. Gas pressure was ranged from 12,5 to 400 kPa. Voltage pulses of negative (U = 25 kV, τ0,5 = 3 ns, τ0,1–0,9 = 0,7 ns) and positive (U = 25 kV, τ0,5 = 10 ns, τ0,1–0,9 = 3 ns) polarities were applied across the gap. Images of the plasma glow at different stages of streamer formation are presented. It was established that a diffuse discharge is formed due to formation of a large streamer. It was found that plasma appears at a certain distance from the conical electrode at both polarities. These and other features of streamer formation are discussed.
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