Electrical and optical study on streamers and spark formation in a steady-state positive pin-plane corona in N2 and ambient air

Yurii Akishev; V. Karal'nik; N. Trushkin

doi:10.1117/12.459410

19 March 2002 Electrical and optical study on streamers and spark formation in a steady-state positive pin-plane corona in N₂ and ambient air

Yurii Akishev, V. Karal'nik, N. Trushkin

Author Affiliations +

Proceedings Volume 4460, Selected Research Papers on Spectroscopy of Nonequilibrium Plasma at Elevated Pressures; (2002) https://doi.org/10.1117/12.459410
Event: Selected Research Papers on Spectroscopy of Nonequilibrium Plasma at Elevated Pressures, 2002, Moscow, Russian Federation

Abstract

It is common, diffusive glow regime of steady-state positive corona is followed by streamer regime with increase in overage corona current. The coefficient of ionization multiplication of electron avalanche over interelectrode gap in glow corona is less than that is necessary for the avalanch-to-streamer transition. Under such conditions, a local development of ionization instability nearby the sharpened electrode plays crucial role in initiation of mild streamers in glow corona. Indeed using a fast frame camera we have revealed on electrode the occurrence of small high-density current spots, which provoked the mild streamer in glow corona. A transient behavior of these streamers followed by spark was examined in detail for a positive pin-plane corona in pure nitrogen and ambient air at atmospheric pressure. It was observed that scenarios for the streamers-to-spark transition in air and N2 differed essentially from each other.

Citation Download Citation

Yurii Akishev, V. Karal'nik, and N. Trushkin "Electrical and optical study on streamers and spark formation in a steady-state positive pin-plane corona in N₂ and ambient air", Proc. SPIE 4460, Selected Research Papers on Spectroscopy of Nonequilibrium Plasma at Elevated Pressures, (19 March 2002); https://doi.org/10.1117/12.459410

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