Stuttgart 2012 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 4: Numerische Modellierung

EP 4.2: Hauptvortrag

Dienstag, 13. März 2012, 17:00–17:30, V55.02

Gyrokinetic Simulations of Plasma Microturbulence with GENE: Numerics and Applications — •Tobias Görler¹, Tilman Dannert¹, Frank Jenko¹, Daniel Told¹, and Stephan Brunner² — ¹Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching, Germany — ²École Polytechnique Fédérale de Lausanne, CRPP, Association Euratom-Confédération Suisse, CH-1015 Lausanne, Switzerland

A better understanding and modeling of plasma microturbulence is inevitable for the realization and optimization of future power plants based on nuclear fusion as the effect of the corresponding anomalous transport on the energy confinement time strongly obstructs a self-sustaining plasma burning by now. Dedicated theory approaches are typically based on gyrokinetics and require massively parallel numerical simulations. A corresponding and quite comprehensive implementation of the gyrokinetic Vlasov-Maxwell system of equations is given by the software package GENE. The presents contribution aims at providing insights in the underlying numerical schemes, the parallelization techniques and physical approaches which, for instance, take advantage of the strong anisotropy of the turbulent structures in magnetic confined fusion plasmas. Particular emphasis will be given to the most recent extensions towards a full-torus and a full-flux surface code which allows for the investigation of finite size effects in small devices and steep gradient regimes. Furthermore, the capability of including self-consistent parallel magnetic fluctuations will be demonstrated as this feature extends the application range even to astrophysical problems.