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P: Fachverband Plasmaphysik

P 8: Low-temperature plasma and applications

P 8.3: Vortrag

Dienstag, 10. März 2020, 14:40–14:55, b302

Electric field measurements on the INCA discharge — Christian Lütke Stetzkamp, •Tsanko Vaskov Tsankov, and Uwe Czarnetzki — Institute for Plasma and Atomic Physics, Ruhr University Bochum, D-44780 Bochum, Germany

A periodically structured vortex electric field can lead to an efficient collisionless energy gain [1,2]. This theoretical concept was realized experimentally by the inductively coupled array (INCA) discharge and the first results reveal the great potential of the concept [2].

The exact structure of the electric field of this discharge is a vital part of the efficiency of the stochastic heating. Here results from measurements of the induced electric field in INCA with different diagnostics are shown and compared with theoretical predictions. In-situ measurements with RF modulation spectroscopy (RFMOS) and ex-situ B-dot measurements are used.

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

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

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