Bochum 2015 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 5: Poster Session - Low Temperature Plasmas
P 5.7: Poster
Montag, 2. März 2015, 16:30–18:30, Foyer Audimax
Current sheet formation during magnetic reconnection experiment — •Dusan Milojevic1, Olaf Grulke1, and Thomas Klinger1,2 — 1Max-Planck-Institut für Plasmaphysik, EURATOM-Association, Wendelsteinstraße 1, D-17491 Greifswald — 2Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald
Magnetic reconnection is a plasma phenomenon in which a topological rearrangement of opposed magnetic fields leads to particle acceleration and heating. A central issue crucial to understanding magnetic reconnection rate is the understanding of the dynamics of the current sheet which forms along the magnetic X-line.
VINETA II is an open field line experimental setup dedicated to studies of magnetic reconnection. It uses straight internal conductors to drive the magnetic flux. A plasma gun, installed on one end of the X-line, acts as a current source for the reconnection current sheet, which forms in response to the inductive electric field along the X-line. The characteristics of the current sheet are crucial for the evolution of magnetic reconnection and is in VINETA strongly influenced by the plasma gun discharge and the details of the current closure.
In this contribution experimental results of the dependence of the reconnection current sheet on the plasma gun discharge and the external current closure are presented. An array of plasma guns are introduced, which strongly affect the geometry of the current sheet. Modifications of the external current closure circuit confirms its importance for the current sheet amplitude.