München 2019 – scientific programme

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.14: Poster

Thursday, March 21, 2019, 16:30–18:30, Foyer Audimax

On the energetic electrons in the INCA discharge — Philipp Ahr, •Tsanko Vaskov Tsankov, and Uwe Czarnetzki — Institute for Plasma and Atomic Physics, Ruhr University Bochum, D-44780 Bochum, Germany

Recent theoretical [1,2] and experimental [3] investigations have revealed the great potential of an inductive type of discharge (INCA – INductively Coupled Array) based on a novel stochastic heating mechanism in periodic vortex fields. The predicted efficient operation at low pressures (below 1 Pa) has been experimentally verified and evidence for the presence of energetic electrons has been found.

Here the origin and the nature of these energetic electrons is further investigated. Using cusp magnetic field confinement and dielectric walls suggests that the production of the energetic electrons requires multiple reflections by the potential in the wall sheath.

[1] U. Czarnetzki and Kh. Tarnev, Phys. Plasmas 21 (2014) 123508

[2] U. Czarnetzki, Plasma Sources Sci. Technol. 27 (2018) 105011

[3] Philipp Ahr et al, Plasma Sources Sci. Technol. 27 (2018) 105010