Erlangen 2018 – scientific programme

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P: Fachverband Plasmaphysik

P 19: Codes and Modelling - Poster

P 19.2: Poster

Wednesday, March 7, 2018, 16:15–18:15, Zelt Ost

Towards a nested neutral–ion kinetic transport model in the plasma boundary — •Friedrich Schluck, Michael Rack, and Detlev Reiter — Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung – Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany

The kinetic Monte Carlo plasma edge code EIRENE is well established for mainly three reasons: (1) broad databases of atomic, molecular, and reactive processes, (2) applicability to real geometries, and (3) integration in frequently used code packages, e.g. SOLPS and EMC3-EIRENE. Ions are typically modelled in fluid description and, thus, handled by different codes, as they are assumed to be in local equilibrium. However, simple collisionality arguments, as well as previous code results have indicated that this approach might be insufficient. They emphasized the importance of kinetic treatment in particular of short-living minority ions.

Until recently, only a strongly reduced handling of ions was implemented in EIRENE, i.e. energy relaxation along magnetic field lines, before other reactive loss mechanisms take place. The goal of our extended kinetic ion transport description within EIRENE is to fully implement all guiding center drifts, pitch-angle scattering, radial diffusion, and equilibration checks for ion ensembles. We present the current status of aforementioned upgrades for EIRENE. Moreover, we embed first simulation results in topical context as we discuss implications in transport for today’s fusion devices like Wendelstein 7-X.