Random Bullets Versus Self-Triggered Short Discharges in a Helium Atmospheric Pressure Plasma Jet - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Plasma Chemistry and Plasma Processing Année : 2023

Random Bullets Versus Self-Triggered Short Discharges in a Helium Atmospheric Pressure Plasma Jet

Résumé

Atmospheric pressure plasma jets driven by AC voltage are reported to exhibit randomness or periodicity under certain operating conditions. In the present article, discharges in a helium plasma jet driven by 16 kHz sinusoidal voltage are studied. In the positive half cycle, several short and slow periodic discharges (3–6 km/s) are observed before the ignition of random longer and faster bullets (20–60 km/s). The characteristics of the random discharges are studied using statistical methods. The propagation of slow plasma bullets and fast bullets is analysed using an ICCD camera and a streak camera. Glowing like plasma that lasts for 2–6 μs is observed near the gap region and possibly provides a high seed electron density for a following microdischarge. The results are compared with a previous study with a similar APPJ which exhibits multi-periodicity under certain conditions. It is proposed that volumetric residual charges may play an important role for APPJs with short gap distances.
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Dates et versions

hal-04489602 , version 1 (05-03-2024)

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Hang Yang, Annemarie van Zwol, Konstantin Burdonov, Julien Fuchs, Antoine Rousseau. Random Bullets Versus Self-Triggered Short Discharges in a Helium Atmospheric Pressure Plasma Jet. Plasma Chemistry and Plasma Processing, 2023, 43 (6), pp.1491-1507. ⟨10.1007/s11090-023-10358-3⟩. ⟨hal-04489602⟩
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