Detecting the Fine Structure of Ionization Waves of Positive Streamers

New data on the fine structure of the ionization wave was obtained under conditions of free and surface streamer discharges in air at moderate pressures (30–150 Torr). Using high-speed photography, it was shown that the streamer head consists of a bright main ionization wave and a less bright glow o...

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Bibliographic Details
Published in:Plasma physics reports 2022-07, Vol.48 (7), p.812-818
Main Authors: Panarin, V. A., Skakun, V. S., Baksht, E. Kh, Sosnin, E. A., Kuznetsov, V. S., Sorokin, D. A.
Format: Article
Language:English
Subjects:
Atomic
Fine structure
High speed photography
Ionization waves
Low-Temperature Plasma
Molecular
Optical and Plasma Physics
Physics
Physics and Astronomy
Precursors
Streamer gas discharge
Wave propagation
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Summary:New data on the fine structure of the ionization wave was obtained under conditions of free and surface streamer discharges in air at moderate pressures (30–150 Torr). Using high-speed photography, it was shown that the streamer head consists of a bright main ionization wave and a less bright glow of the main wave precursor, the distance between which depends on the streamer propagation conditions, and that the shape of the wave precursor is close to the shape of the main wave. Differences in the spectral composition of the main ionization wave and its precursor are determined. The facts found should be used to make additions to the model of the cathode-directed streamer.
ISSN:1063-780X
1562-6938
DOI:10.1134/S1063780X22600372