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Erlangen 2018 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 11: Helmholtz Graduate School - Poster

P 11.11: Poster

Dienstag, 6. März 2018, 16:15–18:15, Redoutensaal

Semi-Lagrangian drift-kinetic simulations in toroidal geometries — •Edoardo Zoni1,2, Yaman Güçlü1, and Eric Sonnendrücker1,21Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany — 2Zentrum Mathematik, TU München, 85748 Garching, Germany

A semi-Lagrangian simulation code is currently under development within the framework of the SeLaLib object-oriented Fortran library [1], in order to perform global electrostatic simulations of drift-kinetic ions and adiabatic electrons in toroidal geometries. The code employs field-aligned interpolation and splitting [2] to reduce significantly the number of poloidal planes and hence the memory footprint of the simulations.

The curvature of the background magnetic field in toroidal geometries causes complications in setting up initial conditions corresponding to a stable kinetic equilibrium, in applying non-constant boundary conditions for the interpolation in the radial and the velocity domains, and in the treatment of the O-point.

Solutions to these problems are presented and discussed, including the development of the corresponding computational tools in SeLaLib.

Verification tests in cylindrical geometry with a screw-pinch magnetic field configuration as well as preliminary results of standard test-cases in toroidal geometries are presented. Helpful collaboration with the GySeLa team is acknowledged.

[1] SeLaLib: Semi-Lagrangian Library, http://selalib.gforge.inria.fr/.

[2] Latu et al., Journal of Scientific Computing, 2017, ISSN 1573-7691.

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