Erlangen 2018 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 9: Atmospheric Pressure Plasmas II

P 9.6: Vortrag

Dienstag, 6. März 2018, 15:30–15:45, A 0.112

Particles densities and temperatures in atmospheric pressure microwave plasma torch — •Ante Hecimovic, Federico Antonio D'Isa, Emile Carbone, and Ursel Fantz — Max Planck Institue für Plasmaphysik

Microwave plasmas at atmospheric pressure are commonly used in the field of species detection, for surface treatment and decomposition of harmful gases. Lately, the microwave plasmas at atmospheric pressure have been investigated for use in that field of energy storage, by storing the energy in the form of chemical energy achieving high energy and conversion efficiencies. A plasma torch is used to generate the plasma, which is a custom made resonator consisting of a coaxial and cylindrical resonator, allowing the plasma to be ignited directly at atmospheric pressure (2.45 GHz, 300W-3kW) inside a tube with inner diameter of 25 mm. In this contribution we report on investigation of the microwave plasma in air and air/Ar/N2 mixtures using optical emission spectroscopy, and mass spectrometry. After initial test in air/Ar/N2 mixtures, the transition from an air/Ar/N2 plasma to CO2 plasma is planned. The focus on using the spatially resolved OES investigation is the vibrational and rotational bands of N2, with the energy load of vibrational levels being comparable to the energy levels of CO2. Mass spectrometry measurements of the plasma effluent are performed where the influence of the gas flow, air/Ar gas mixture, and the power level is investigated. The mass spectrometry measurements are done using a custom made spectrometer which configuration should overcome gas-demixing effects.