Hannover 2020 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 16: Poster Session 3

P 16.19: Poster

Mittwoch, 11. März 2020, 16:30–18:30, Empore Lichthof

Actinometric measurements of an RF-driven atmospheric pressure plasma including calibration of a spectrometer via a tungsten-band lamp — •Natascha Blosczyk, Judith Golda, Tristan Winzer, and Jan Benedikt — Institute of Experimental and Applied Physics, Kiel University, Germany

Atmospheric pressure plasmas have a wide range of usage in surface modification or medicine, because they generate active species such as atomic oxygen. The densities of these species depend on different parameters including gas composition and residence time in the plasma, therefore the influence of those parameters has to be examined. However, the determination of these dependencies is challenging, because many diagnostic methods interfere with the plasma.

In this contribution, an optical spectroscopy measurement of an RF-driven atmospheric pressure plasma jet operated in helium with admixture of oxygen and argon, taking an actinometric approach to measure the atomic oxygen density, is presented. The dependency of the results on total gas flow, position in jet and oxygen admixture is determined using a simplified actinometric approach. Further, the results are compared to those of an improved actinometric calculation taking in consideration additional effects influencing generation and depletion of atomic oxygen.