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P: Fachverband Plasmaphysik

P 16: Poster: Magnetischer Einschluss

P 16.15: Poster

Mittwoch, 1. April 2009, 17:30–19:30, Foyer des IfP

Experimental Investigation of Magnetic Flux Tubes — Felix Mackel, Holger Stein, •Jan Tenfelde, and Henning Soltwisch — Ruhr University Bochum, Bochum, Germany

High temperature plasmas interact strongly with external and internal magnetic fields; this leads to the development of collimated structures and kink-like instabilities. In the frame of the FlareLab project a arc-shaped discharge, reminiscent of solar prominences, is investigated. The design of the pulsed discharge, which was inspired by previous works of Bellan et al.[1], is modular and allows easy replacement of the electrode system. A floating electrostatic triple-probe [2] and magnetic induction probes are employed to monitor the development of discharge current, density and temperature. The emission is analysed by means of a fast framing ICCD camera and a Spex 1m spectrograph. Combining the different diagnostics, the size and evolution of the discharge current channel can be examined. The focus lies on an investigation of the temporal evolution of kink-like structures. An MHD effect described by Bellan et al.[3], which leads to an increase of the gas flow velocity in the electrode vicinity, is examined.
P.M. Bellan and J.F. Hansen, Phys. Plasmas 5 (1998), (1991).
S.L. Chen, T. Sekiguchi, J. Appl. Phys. 36, 8 (1965).
E.V. Stenson, P.M. Bellan, IEEE Trans. Plasma Sci. 36, 4 (2008).