Erlangen 2018 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 9: Atmospheric Pressure Plasmas II
P 9.5: Vortrag
Dienstag, 6. März 2018, 15:15–15:30, A 0.112
Differences in heating mechanisms for helium and argon discharges in the COST-Jet — •Judith Golda1,2 and Volker Schulz-von der Gathen2 — 1Institute of Experimental and Applied Physics, Kiel University, Germany — 2Experimental Physics II, Ruhr-Universität Bochum, Germany
Non-thermal atmospheric pressure plasma jet devices - such as the well-investigated micro-scaled atmospheric pressure plasma jet (µ-APPJ) - efficiently generate reactive species at low gas temperature. Hence, they are commonly used for surface modification and considered for use in bio-medicine. However, the µ-APPJ relies on helium as feed gas and attempts to operate the source in argon without any geometric modifications proved to be difficult due to yet unknown reasons.
Here, we present investigations of the COST-Jet, the successor of the µ-APPJ, that allows operation in helium and argon. The two plasma discharges will be compared by means of electrical, optical and phase-resolved optical measurements.
Electrical and optical measurements are correlated to explain the differences between the behavior of argon and helium discharge. Our results show that the main discharge processes in the argon discharge are similar to the helium discharge, but slight differences due to the intrinsic properties of the gases notably change the discharge behavior.
Funded by the DFG within PlaCiD SCHU-2353/3-1.