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P: Fachverband Plasmaphysik
P 16: Poster Session Plasma Physics
P 16.61: Poster
Donnerstag, 19. März 2026, 13:45–15:45, Redoutensaal
A novel reactor to observe changes in ion composition in operando by continuously changing the plasma facing material — •Maurice Artz1, Jannis Christiansen1, Kerstin Sgonina1, and Jan Benedikt1, 2 — 1Institute of Experimental and Applied Physics, Kiel University, Germany — 2Kiel Nano, Surface and Interface Science (KiNSIS), Kiel University, Germany
In atmospheric pressure plasmas it is difficult to observe in operando the formation of ionic species. However, this observation is crucial e.g. for the understanding of the correlation of materials and plasma properties in the field of plasma-assisted catalysis. Therefore, a sub-atmospheric pressure radio frequency (RF) reactor was developed to bridge this research question. It allows for the in operando speciation analysis during the continuous change of the plasma facing material. The influence of the material facing the plasma region on the plasma composition can be observed in this reactor.
The sub-atmospheric RF reactor is operated in a pressure range from 20 to 80 mbar. The reactor is mounted atop the sampling orifice of an ion mass spectrometer, acting as a grounded electrode, so that the plasma is directly ignited above the orifice and created ions can be studied. Halfly coated walls can be moved along the plasma by continuously measuring the changes of ion fluxes. In first measurements the walls were coated with carbon for etching experiments or cobalt containing catalysts for conversion experiments.
Keywords: reactor design, RF plasma