Bremen 2017 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 13: Magnetic Confinement

P 13.9: Poster

Dienstag, 14. März 2017, 16:30–18:30, HS Foyer

Preparation of an experimental plasma stability survey in Wendelstein 7-X plasmas — •Henning Thomsen1, Tamara Andreeva1, Christian Brandt1, Joachim Geiger1, Axel Könies1, Ulrich Neuner1, Carolin Nührenberg1, Kian Rahbarnia1, Jonathan Schilling2, and W7-X Team11Max Planck Institute for Plasma Physics, Wendelsteinstr. 1, 17491 Greifswald, Germany — 2Christian-Albrechts-Universität zu Kiel, IEAP, Leibnizstr. 11, 24114 Kiel, Germany

The Wendelstein 7-X stellarator (W7-X) ended its first operational phase in March 2016. The preparations for the next experimental phase (which is planned to begin in summer 2017) have been started. Currently ongoing upgrades of the first wall and the microwave heating system enable the realization of higher plasma performance in W7-X. Additionally, the plasma diagnostic capabilities are extended. In view of the detection of the magneto-hydrodynamic (MHD) properties, the most important supplements are the installation of the X-ray multi camera tomography system (allowing the reconstruction of a poloidal flux surface) and the integration of a set of Mirnov coils (magnetic probes for the detection of MHD modes). These improvements provide the possibility to investigate the MHD stability of the Wendelstein 7-X stellarator plasmas and the validation of this design optimization goal for different magnetic configurations. In this contribution we present the planning for the proposed measurements during the next experimental campaign, based on the results obtained during the first experimental phase as well as the new diagnostic and device capabilities.

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