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P: Fachverband Plasmaphysik
P 16: Invited talks IV
P 16.2: Invited Talk
Thursday, March 31, 2022, 11:30–12:00, P-H11
Plasma-beta effects on the island divertor of Wendelstein 7-X — •Alexander Knieps1, Yasuhiro Suzuki2, Joachim Geiger3, Andreas Dinklage3, Song Zhou1,4, Henning Thomsen3, Marcin Jakubowski3, Ralf König3, Michael Endler3, Yu Gao3, and Yunfeng Liang1,4 — 1Forschungzentrum Jülich, Jülich — 2Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, Japa — 3Max-Planck-Institut für Plasmaphysik, Greifswald — 4Huazhong University of Science and Technology, Wuhan, China
The Wendelstein 7-X Stellarator relies on an island divertor to control its heat- and particle-exhaust. In this divertor concept, the scrape-off layer is formed by a magnetic island chain between the divertor plates and the main plasma.
It is important to conserve the divertor topology in the up- coming steady-state experimental campaign. However, the magneto-hydrodynamic plasma response driven in finite-beta plasmas can substantially effect the magnetic topology in the plasma edge. Depending on the configuration, the plasma response have distinctly different effects.
This presentation will showcase finite-beta MHD equilibrium simulations for finite-beta plasmas in different magnetic configurations of W7-X, calculated with the 3D MHD equilibrium code HINT. Based on these simulations, we then extrapolate the heat-loads on plasma-facing components using an anisotropic diffusion model.