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P: Fachverband Plasmaphysik

P 17: Poster Session - Helmholtz Graduate School for Plasma Physics

P 17.14: Poster

Mittwoch, 19. März 2014, 16:30–18:30, SPA Foyer

Numerical studies for the nuclear fusion reactor Wendelstein 7-X — •Hauke Hölbe — Max-Planck-Institut für Plasmaphysik, EURATOM-Assoziation, Wendelsteinstraße 1, D-17491 Greifswald

The nuclear fusion experiment Wendelstein 7-X is currently under construction in Greifswald, Germany. After completion in 2014, the experiment will be the largest and most advanced stellarator ever built. The cryostat hosting the superconducting coils and the vacuum vessel has a diameter of 16 meters and a height of 5 meters, and the magnetic field will be 2.5 T on axis.

Wendelstein 7-X is designed to prove simultaneous high density, high temperature, steady-state plasma operation. The first plasma is planned for 2015. After first tests the plasma pulse time will be gradually increased up to 30 minutes from 2019 on.

The core plasma temperature in this device will be over 100 million degree. Therefore, contact with the plasma facing components must be done carefully. One challenge in this connection is that the plasma shape will change during operation due to internal plasma currents generated by the plasma itself. Using state-of-the-art codes, we are investigating and developing operational scenarios for the first, relatively short plasma pulses, that allow us to address important issues for the later steady-state operation.