Berlin 2014 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 5: Low Temperature Plasmas I
P 5.5: Vortrag
Montag, 17. März 2014, 17:55–18:10, SPA HS201
Plasma Chemistry Induced by Low Energy Electron Beams — •Andreas Himpsl1, Thomas Dandl1, Thomas Heindl1, Alexander Neumeier1, Jochen Wieser2, and Andreas Ulrich1 — 1Physik Department E12/E15, Technische Universität München, James-Franck-Str. 1, 85748 Garching — 2excitech GmbH, Branterei 33, 26419 Schortens
A table-top setup for studying plasma chemical reactions is described. Low energy (15 keV) electrons are used to induce the chemical reactions. The experiments are performed with gases and gas mixtures at atmospheric pressure. The radiolysis of CO2 is studied as an example and a G-value of 3 was achieved for a gas flow of 14 ml/min. The experiments were performed with a total beam power of 450 mW sent into a gas cell with a volume of 40 mm3. Mass spectrometry and a spectroscopic study were used for the diagnostics. A catalytic effect of xenon for the splitting of CO2 molecules was observed and supported by comparative measurements with Ar-CO2 and Ar-Xe-CO2 mixtures. The power deposition profiles in the target cell are discussed on the basis of a numerical model. This work has been supported by the Maier-Leibnitz-Laboratorium München.