Hannover 2020 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 16: Poster Session 3
P 16.3: Poster
Mittwoch, 11. März 2020, 16:30–18:30, Empore Lichthof
Non-linear MHD Assessments of Stellarator-like Tokamaks — •Rohan Ramasamy1, 2, Matthias Hoelzl1, Erika Strumberger1, Qingquan Yu1, Javier Artola3, Karl Lackner1, and Sibylle Günter1 — 1Max Planck Institute for Plasma Physics, Garching, Germany — 2Max Planck/Princeton Research Centre for Plasma Physics — 3ITER Organization, Route de Vinon sur Verdon, 13067 St Paul Lez Durance Cedex, France
Quasi-axisymmetric stellarators (QAS) have been proposed as a hybrid approach to plasma confinement, offering both the desirable magneto-hydrodynamic (MHD) stability of stellarators, as well as the favourable energy transport properties of tokamaks. The non-linear MHD code JOREK is currently being extended in order to assess these devices. A 3D MHD model and non-axisymmetric grid, appropriate for stellarator simulations are being developed, as well as improvements to the current numerical solver.
In the short term, previous linear studies have shown that axisymmetric approximations to QAS devices can preserve the stability structure observed in 3D simulations. It has therefore been proposed to assess the non-linear evolution of QAS equilibria using such an approximation. This contribution presents simulation results of large scale instabilities in stellarator-like devices, validating against other MHD codes, and analytic solutions, to provide an intuition for the non-linear dynamics of stellarators.