Microchannel Structure of a Spark Discharge in a “Pin to Plane” Gap at Different Air Pressures

Using high-speed photography and shadow photography, the structure of the glow and the microstructure of the spark discharge in a 1.5 mm long “pin(cathode)-plane” gap in air in the pressure range from 300 to 760 Torr has been studied. The presence of a micro channel structure of the discharge in the...

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Bibliographic Details
Published in:Technical physics 2024, Vol.69 (4), p.1057-1061
Main Authors: Trenkin, A. A., Almazova, K. I., Belonogov, A. N., Borovkov, V. V., Gorelov, E. V., Dolotov, A. S.
Format: Article
Language:English
Subjects:
Classical and Continuum Physics
Electric sparks
High speed photography
Microchannels
Microstructure
Physics
Physics and Astronomy
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Summary:Using high-speed photography and shadow photography, the structure of the glow and the microstructure of the spark discharge in a 1.5 mm long “pin(cathode)-plane” gap in air in the pressure range from 300 to 760 Torr has been studied. The presence of a micro channel structure of the discharge in the indicated pressure range was established—the discharge is a aggregation of a large number of micron-diameter channels. It is shown that with decreasing pressure, the evolution of the microstructure and glow of the discharge lags behind the onset of breakdown, however, their morphology retains similarity at different pressures.
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784224030381