A model of the streamer‐induced spark formation based on neutral dynamics

Autor:	François Bastien, Emmanuel Marode, Miente Bakker
Rok vydání:	1979
Předmět:	Protein filament Atmospheric pressure Chemistry Ionization Flow (psychology) General Physics and Astronomy Atmospheric electricity Current (fluid) Atomic physics Lightning Corona
Zdroj:	Journal of Applied Physics. 50:140-146
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.325697
Popis:	The breakdown of a positive point to plane gap in air near atmospheric pressure begins with the formation of a low‐conductivity filament by the space‐charge‐controlled streamer process. Within the filament, the rate of electron attachment exceeds that of ionization, and the external current decreases. However, a sudden rise of current leading to spark breakdown can be observed. The following explanation is proposed. Owing to the current flow the temperature increases within the discharge. A radial flow of neutral species will thus appear, which decreases the neutral density near the discharge axis. In turn E/N increases until the ionization rate becomes greater than that of attachment, leading to the final current growth.
Databáze:	OpenAIRE
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