Bremen 2017 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 23: Low Temperature Plasmas

P 23.3: Poster

Mittwoch, 15. März 2017, 16:30–18:30, HS Foyer

Force balance and Ohm’s law in the reconnecting current sheet in the VINETA-II magnetic reconnection experiment — •Ilya Shesterikov¹, Adrian von Stechow¹, Dusan Milojevic¹, Olaf Grulke¹ und Thomas Klinger^1,2 — ¹Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany — ²Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald

VINETA-II is a linear experiment developed for the study of a driven magnetic reconnection. The global description of the current sheet properties is important to relate magnetic reconnection to the response of the plasma. This includes the three-dimensional (3D) estimate of the diamagnetic current, the Lorenz force and E^→ × B^→ terms included in the MHD force balance equation. A 3D positioning system equipped with a fast swept Langmuir probe and B-dot probe is used. These two probes together provide a complete set of quantities required in the analysis: n_e, T_e, φ_fl, φ_p - from the Langmuir probe and B^→ from the B-dot probe. E^→ is evaluated on the base of the spatial distribution of φ_p. Within the frame of global description one addresses the key question which terms in the generalized Ohm’s law have a major influence on the evolution of magnetic reconnection. The previous 2D estimate of the in-plane MHD force balance showed that the E^→ × B^→ term plays a significant role. In the present work we present a full 3D estimation, without the assumption on the axial homogeneity.