Erlangen 2018 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 12: Magnetic Confinement - Poster

P 12.12: Poster

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

Gyrofluid Simulations of Tokamak Edge Plasmas — •Adam Dempsey, Huw Leggate, and Miles M. Turner — Dublin City University, Dublin 9, Ireland

Filaments are field aligned structures that are known to form in the scrape-off-layer (SOL) in tokamaks. These structures are composed of hot electrons and ions. They can constitute a non-negligible thermal and particle flux on the first wall. As such the propagation of these structures to the first wall is problematic. One approach to predicting such fluxes in plasmas is to rely on simulation.

The approach described herein is to use a gyrofluid model (GEM). Gyrofluid models incorporate higher order finite Larmor radius effects more naturally that other fluid models. Initial progress towards solving this gyrofluid model in a slab geometry is presented. BOUT++ which is a framework for writing fluid and plasma simulations is used to evolve the gyrofluid moment equations. The focus of these simulations is on the effect of finite Larmor radii on filament propagation near the SOL. Of particular interest are filament-background interactions and the verification of filament velocity scaling laws which have to date largely been identified using fluid models.