München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.128: Poster

Donnerstag, 21. März 2019, 16:30–18:30, Foyer Audimax

Kinetic Modeling of Nitrogen Impurities in the ITER Edge — •Friedrich Schluck¹, Michael Rack¹, Yuhe Feng², and Petra Börner¹ — ¹Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung Plasmaphysik, 52425 Jülich, Germany — ²Max-Planck-Institute für Plasmaphysik, 17491 Greifswald

Inflow of different gas species into magnetic confinement fusion devices allows for control of the spatial and energetic properties of radiated power. This way it is envisaged to directly influence confinement and heat load on the first wall material, ultimately leading to detached conditions. Future devices like ITER, which will host plasmas of unprecedented high energy, critically depend on the in-depth analysis of the influence of the injected gas.

Minority ions in fusion plasmas might not thermalize in their lifespan and thus request kinetic treatment. The ion transport part of the kinetic Monte-Carlo code EIRENE [D. Reiter et al., Fus. Sci. Tec. 47 (2), 172 (2005)] has been enhanced by regarding first order drift effects, diffusion, and mirror force [F. Schluck et al., submitted to Nucl. Fus.]. We analyze molecular nitrogen seeding into the ITER baseline scenario using the full 3D code package EMC3-EIRENE [Y. Feng et al., J. Nucl. Mat. 266-269, 812-818 (1999)]. We present first results on the charge state resolved density distribution in the divertor. Furthermore, we analyze single particle lifecycles undergoing multiple charge state transitions and being affected by large transverse displacements. In the end, we draw conclusions for the impact of seeded nitrogen on the radiated power and give an outlook to future endeavors.