Berlin 2014 – scientific programme

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P: Fachverband Plasmaphysik

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

P 17.13: Poster

Wednesday, March 19, 2014, 16:30–18:30, SPA Foyer

Electromagnetic simulations of tokamaks and stellarators — •Michael Cole and Alexey Mishchenko — Max-Planck-Institut für Plasmaphysik, EURATOM-Assoziation, Wendelsteinstraße 1, 17491 Greifswald, Germany

A practical fusion reactor will require a plasma β of around 5%. In this range Alfvénic effects become important. Since a practical reactor will also produce energetic alpha particles, the interaction between Alfvénic instabilities and fast ions is of particular interest. We have developed a fluid electron, kinetic ion hybrid model that can be used to study this problem. Compared to fully gyrokinetic electromagnetic codes, hybrid codes offer faster running times and greater flexibility, at the cost of reduced completeness.

The model has been successfully verified against the worldwide ITPA Toroidal Alfvén Eigenmode (TAE) benchmark, and the ideal MHD code CKA for the internal kink mode in a tokamak. Use of the model can now be turned toward cases of practical relevance. Current work focuses on simulating fishbones in a tokamak geometry, which may be of relevance to ITER, and producing the first non-perturbative self-consistent simulations of TAE in a stellarator, which may be of relevance both to Wendelstein 7-X and any future stellarator reactor. Preliminary results of these studies will be presented.