München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 4: Atmospheric Pressure Plasmas I

P 4.4: Vortrag

Montag, 18. März 2019, 15:00–15:15, HS 20

Radio-frequency driven atmospheric pressure microplasma jets: voltage waveform tailoring and its effect on electron heating — Yue Liu¹, Ihor Korolov², Julian Schulze², Torben Hemke², and •Thomas Mussenbrock¹ — ¹Brandenburg University of Technology Cottbus-Senftenberg, 03046 Cottbus, Germany — ²Ruhr University Bochum, 44780 Bochum, Germany

Capacitive microplasma jets driven at atmospheric pressure by sinusoidal or particularly tailored voltage waveforms are employed as efficient plasma sources for surface modification and other processes. One special variant is the micro atmospheric pressure plasma jet (µAPPJ). In this contribution the characteristics of the µAPPJ driven by different voltage waveforms in a helium-oxygen mixture are studied by numerical simulations in conjunction with experiments. The electron dynamics, as well as the dynamics of reactive species are investigated in both the region between the electrodes and within the effluent, particularly with regard to the effect of different driving voltage waveforms. — Financial support granted by the German Research Foundation in the frame of SFB 1316 (project A4) is gratefully acknowledged.