Hannover 2020 – scientific programme
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P: Fachverband Plasmaphysik
P 10: Poster Session 2
P 10.10: Poster
Tuesday, March 10, 2020, 16:30–18:30, Empore Lichthof
Implementation and testing of stellarator-capable models in JOREK — •Nikita Nikulsin1, Matthias Hoelzl1, Alessandro Zocco2, Rohan Ramasamy1, Karl Lackner1, and Sibylle Günter1 — 1Max Planck Institute for Plasma Physics, Garching, Germany — 2Max Planck Institute for Plasma Physics, Greifswald, Germany
The JOREK nonlinear MHD code, which currently only supports tokamak simulations, is being extended to stellarators. This is a two-part process. First, a stellarator-capable model, i.e. a model that does not make any assumptions on the underlying geometry, needs to be implemented. The second step involves modifying the currently implemented axisymmetric flux-aligned grids to allow alignment to non-axisymmetric flux surfaces.
We have derived a hierarchy of stellarator-capable models which have better conservation properties than presently used models, but also a different and more complicated mathematical structure [1]. Here, we present our work on the implementation of these new models, first testing results and the peculiarities associated with the new models. A comprehensive benchmark of the new models against presently used models will be carried out in the tokamak limit before we proceed to stellarator simulations.
[1] N. Nikulsin et al, Phys. Plasmas 26, 102109 (2019).