Erlangen 2018 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 17: Atmospheric Pressure Plasmas - Poster

P 17.7: Poster

Mittwoch, 7. März 2018, 16:15–18:15, Zelt Ost

Optical emission spectroscopy of excimer emission band structures in an atmospheric pressure helium plasma jet — •Tristan Winzer, Judith Golda, Franko Greiner, and Jan Benedikt — Institute of Experimental and Applied Physics, Kiel University, Germany

Atmospheric pressure plasmas have received increasing attention in recent years due to their potential applications not only in industrial processes but also in plasma medicine. Their non-equilibrium characteristics enable treatment of surfaces which are sensitive to heat. However, diagnostics is challenging due to their small dimensions.

Optical emission spectroscopy (OES) is a non-invasive diagnostic technique providing information about species, excitation mechanisms and gas temperature. Using OES in the visible range, an atmospheric pressure dielectric barrier discharge operating in helium was investigated. The intensity of the molecular bands of helium excimers was studied under variation of gas flow and power dissipated in the plasma. Using a Boltzmann-Plot, we calculated the rotational temperature of helium molecules and drew conclusions on the gas temperature.