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P: Fachverband Plasmaphysik
P 6: Plasma-surface interaction
P 6.2: Vortrag
Dienstag, 10. März 2020, 11:30–11:55, b302
The impact of surface morphology on the erosion of metallic surfaces -modelling with the 3D Monte-Carlo code ERO2.0 — •Alina Eksaeva1, Dmitry Borodin1, Juri Romazanov1, Andreas Kirschner1, Arkadi Kreter1, Beatrix Göths1, Marcin Rasinski1, Bernhard Unterberg1, Sebastijan Brezinsek1, Christian Linsmeier1, Espedito Vassallo2, Matteo Passoni2,3, David Dellasega2,3, Michele Sala3, and Federica Romeo3 — 1Forschungszentrum Juelich GmbH, Institut fuer Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), Juelich, Germany — 2Istituto per la Scienza e Tecnologia dei Plasmi, CNR, Milano, Italy — 3Dipartimento di Energia, Politecnico di Milano, Via Ponzio 34/3, 20133 Milan, Italy
The surface roughness has a vital impact on the erosion of plasma-facing components. The 3D Monte-Carlo code ERO2.0 is a versatile tool for describing the erosion and transport of impurities in the plasma. A model describing the surface roughness effect on erosion was implemented into the ERO2.0 code. A series of plasma experiments on surface roughness effect on the erosion have been carried out at the linear plasma device PSI-2. Experiments show in the case of molybdenum a reduction of the net erosion by up to 40% (rel. to the smooth case) due to the surface roughness of Ra = 600 nm, which is in line with ERO2.0 predictions. For the case of the JET ITER-like wall divertor (W-coated tiles) model shows the reduction of the net erosion by the factor of 2 for the surface roughness of 10 mcm scale; increased deposition in shadowed from the plasma areas is observed.