Hannover 2016 – scientific programme

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P: Fachverband Plasmaphysik

P 2: Plasma Diagnostics I

P 2.6: Talk

Monday, February 29, 2016, 12:40–12:55, b305

investigation of gas parameters at high electrical field strength and under atmospheric gas pressure — •xingming fan, lothar naumann, mathias siebold, marcus kaspar, jörn dreyer, burkhard kämpfer, roland kotte, alejandro laso garcía, markus löser, ulrich schramm, and daniel stach — Helmhotz-Zentrum Dresden-Rossendorf

The laser test facility of the Helmholtz-Zentrum Dresden-Rossendorf for more precise measurements of different gas parameters in micro-gap geometries with high electrical field up to 100kV/cm and at normal pressure will be presented. The light of 257nm is focused into the gas to initialize primary electrons by multiphoton ionization. The diameter of the focus is less than 20μm and the length is lesser than 500*m. The Townsend coefficient and electron drift velocity are presented for several gas mixtures. Simulations with the Garfield++ framework were performed for comparable geometries, gas mixtures and electrical fields. Experimental and simulation results will be discussed.