Formation of an argon plasma jet fed by bunches of bipolar high-voltage pulses

M. È. Pinchuk, O. M. Stepanova

Institute of Problems of Electrophysics of the Russian Academy of Sciences, St. Petersburg, Russia

Abstract: An argon plasma jet, which is formed in an ambient air at the output of a quartz tube by a dielectric-barrier discharge with an electrode system consisting of central rod and outer ring electrodes and fed by an applied voltage generated as bipolar pulses bunches of variable duration, has been studied. The reproducible from bunch to bunch dynamics of propagation of guided streamers forming a plasma jet was observed. An increase in the distance traveled by each subsequent streamer compared to the previous one in each subsequent positive pulse in the bunch has been recorded. The streamer imaging was carried out in the presence of a dielectric target; the jet approaching to the target surface up to its contact has been registered. The nature of the jet propagation to the target has been shown to be controlled by changing the duration of the bunches and the time between them.

Keywords: argon atmospheric pressure plasma jet, guided streamer, control of streamer propagation dynamics, dielectric barrier discharge.

Received: 09.10.2023
Revised: 18.12.2023
Accepted: 28.12.2023

DOI: 10.61011/PJTF.2024.08.57517.19760

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