Erlangen 2018 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 9: Atmospheric Pressure Plasmas II

P 9.1: Hauptvortrag

Dienstag, 6. März 2018, 14:00–14:30, A 0.112

Next generation gases in gas discharge applications. — •Christian Franck — Swiss Federal Institute of Technology (ETH Zürich), Zürich, Switzerland

Insulation gases and dielectric discharges are used in a number of industrial and research applications. In many of these, fluorinated gases are used today that have a significant global warming potential and are now regulated by international policies or even phased-out. A strong international research and development for next generation gases and gas mixtures is thus ongoing. Besides the identification and synthesis of new molecules itself, also their behaviour in gaseous discharges needs to be investigated and understood to achieve a comparable performance in the final application.

In this presentation, the search, the requirements, and latest trends in using next generation gases in gas discharge applications are given in the context of two examples: high-voltage gas-insulated switchgear (GIS) and resistive plate chamber (RPC) detectors. Both are operated under very different condition, but the same properties need to be investigated. GIS is operated below the critical electric field strength and at high pressures and down to low ambient temperatures. RPCs are operated above the critical electric field strength, but at ambient pressure and temperature. Basic parameters of interest are ionization, attachment, detachment and ion conversion rates, synergistic behaviour with mixing gases, and basic thermodynamic properties.