Berlin 2014 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 17: Poster Session - Helmholtz Graduate School for Plasma Physics
P 17.3: Poster
Mittwoch, 19. März 2014, 16:30–18:30, SPA Foyer
Exploration of radiation cooling for startup plasmas at Wendelstein 7-X with EMC3-EIRENE simulations — •Florian Effenberg1, Yühe Feng2, Sergey Bozhenkov2, Heinke Frerichs1, Hauke Hölbe2, Detlev Reiter1, Oliver Schmitz1, and Thomas Sunn Pedersen2 — 1Institute of Energy and Climate Research - Plasma Physics, Forschungszentrum Jülich GmbH, Association EURATOM-FZJ, Partner in the Trilateral Euregio Cluster, 52425 Jülich, Germany — 2Max-Planck Institute for Plasma Physics, Association EURATOM-IPP, 17491 Greifswald, Germany
The stellarator Wendelstein 7-X will use a limiter configuration in the first plasma operation phase. In this field configuration the edge does not include magnetic islands and the scrape-off layer is defined by five poloidal graphite limiters at the toroidal symmetry planes. Exploring options to reduce the heat flux to these components is important for optimization of the performance and duration of these first plasmas.
The 3D plasma transport Monte-Carlo code EMC3-EIRENE is based on a fluid model for electrons and ions, on a kinetic model for neutral particles, and a simplified fluid approach for impurity ions. For startup plasmas with heating power up to 5 MW, plasma transport simulations are performed taking impurities due to carbon sputtering from the limiters into account. The reduction of heat load to plasma facing components by radiative cooling is investigated with respect to intrinsic carbon and active injected nitrogen.