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P: Fachverband Plasmaphysik

P 20: Plasma-Wand-Wechselwirkung

P 20.2: Vortrag

Donnerstag, 22. März 2007, 15:00–15:15, 6C

A 3D TRACE ION MODULE FOR FUSION EDGE PLASMA MONTE CARLO CODES — •Josef Seebacher¹, Detlev Reiter², and Petra Börner² — ¹Association EURATOM-ÖAW,Institute for Theoretical Physics, University of Innsbruck, A-6020 Innsbruck, Austria — ²Institute for Plasmaphysics, Forschungszentrum Jülich, Association EURATOM, D-52425 Jülich, Germany

3D modelling of kinetic transport effects of impurity ions is important for quantifying various elementary physical processes in the scrape off layer (SOL) of magnetic fusion devices. For this purpose a trace ion module (TIM) has been developed and incorporated into the Monte Carlo transport code EIRENE. The TIM consists of a trajectory integrator tracing the motion of a guiding centre particle in general 3D electric and magnetic fields, and a stochastic form of the Fokker-Planck operator treating Coulomb collisions with the plasma background species. The TIM enables the integrated SOL simulation packages B2-EIRENE and EMC3-EIRENE to treat the physical and chemical processes near the divertor targets and in the bulk of the SOL in greater detail than before. Of special interest is the formation and transport of hydrocarbon molecules and ions in the divertor in tokamaks, where the tritium codeposition via hydrocarbons remains a serious issue for next generation fusion devices like ITER. Code verification studies as well as real tokamak modelling scenarios will be discussed with the code packages B2-EIRENE (2D) and EMC3-EIRENE (3D). Applications to hydrocarbon transport studies in TEXTOR and ITER will be presented.