Jena 2013 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 11: Poster: Niedertemperaturplasmen
P 11.17: Poster
Mittwoch, 27. Februar 2013, 16:30–18:30, Poster EG
Fluctuations in the Current Sheet of the VINETA II Magnetic Reconnection Experiment — •Adrian von Stechow1, Olaf Grulke1, and Thomas Klinger1,2 — 1Max-Planck-Institut für Plasmaphysik, EURATOM Assoziation, Greifswald — 2Ernst Moritz Arndt-Universität Greifswald
VINETA II is a cylindrical experiment for the study of driven magnetic reconnection in a well-controllable laboratory environment. Its features include an axial guide field which enables gyrokinetic simulations of the entire experiment. The rf plasma source allows for variation of the plasma density over three orders of magnitude (ne = 1016 − 1019 m−3, Te = 6 eV), thereby enabling the transition from collisionality dominated to a collisionless reconnection regime. In the modular cylindrical vessel, two parallel axial wires (I = 1 kA) create a figure-eight in-plane magnetic field with an X-line along the central axis. Along this line, a narrow current sheet is supplied by a plasma gun and driven by an axial inductive field. Investigation of the physics in this region is central to the understanding of reconnection, since its microscopic electromagnetic dynamics determines the rate at which reconnection proceeds. In this contribution, the current sheet topology and its high-frequency fluctuations in the VINETA II experiment as measured by arrangements of magnetic and Langmuir probes are presented.