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Microchannel structure of a spark discharge in a pin to plane " gap at different air pressures

Russian version

DOI: 10.21883/TP.2022.11.55173.184-22

Trenkin A. A.¹, Almazova K. I.¹, Belonogov A. N.¹, Borovkov V. V.¹, Gorelov E. V.¹, Dolotov A. S.¹

¹Federal State Unitary Enterprise "Russian Federal Nuclear Center - All-Russian Research Institute of Experimental Physics", Sarov, Nizhny Novgorod Region, Russia

Email: alexey.trenkin@gmail.com

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Abstract
References
Статистика просмотров

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 microchannel 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 Keywords: spark discharge, microstructure, method of shadow photography, high-speed shooting.

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