Bremen 2017 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 27: Low Temperature Plasmas
P 27.2: Vortrag
Donnerstag, 16. März 2017, 14:30–14:45, HS 2010
ERO modelling of surface morphology effect on metal erosion — •Alina Eksaeva1,2, Dmitry Borodin1, Arkadi Kreter1, Daisuke Nishijima3, Albrecht Pospieszczyk1, Tobias Schlummer1, Bernhard Unterberg1, Stephan Ertmer1, Andreas Kirschner1, Juri Romazanov1, Sebastijan Brezinsek1, and Evgeny Marenkov2 — 1Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung, 52425 Jülich, Germany — 2National Research Nuclear University MEPhI, 31, Kashirskoe sh., 115409, Moscow, Russia — 3Center for Energy Research, University of California at San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0417, USA
Linear plasma device PSI-2 with its continuous plasma operation is an excellent test bed for the investigation of plasma-facing material erosion including delicate effects like e.g. nano- and micro-scale surface structures and roughness. However, numerical modelling is indispensable for the correct interpretation of experiments. The 3D Monte-Carlo code ERO is a tool for describing the erosion and local transport of impurities taking into account the particular geometry. Several experiments have been carried out at PSI-2 facility to investigate the evolving surface morphology of tungsten (W) and chromium (Cr) and provide a consistent set of data for the interpretation with the ERO code. The aim of this work is to incorporate the effect of surface morphology into the ERO modelling based on free parameters (angular, energy distributions of sputtered particles, sputtering yields influenced by morphology evolution, metastable states lifetime) matched with the experiments.