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ERO2.0 modelling of the effects of surface roughness on molybdenum erosion and redeposition in the PSI-2 linear plasma device
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SYSNO ASEP 0540332 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title ERO2.0 modelling of the effects of surface roughness on molybdenum erosion and redeposition in the PSI-2 linear plasma device Author(s) Eksaeva, A. (DE)
Borodin, D. (DE)
Romazanov, J. (DE)
Kreter, A. (DE)
Pospieszczyk, A. (DE)
Dickheuer, S. (DE)
Möller, S. (US)
Göths, B. (DE)
Rasinski, M. (DE)
Knochen, M. (UY)
Terra, A. (DE)
Kirschner, A. (DE)
Borodkina, I. (RU)
Eichler, M. (DE)
Unterberg, B. (DE)
Brezinsek, S. (DE)
Linsmeier, Ch. (DE)
Vassallo, G. (GB)
Pedroni, M. (IT)
Passoni, M. (IT)
Dellasega, D. (IT)
Sala, M. (DE)
Romeo, F. (IT)
Henderson, S. (GB)
O'Mullane, M. (GB)
Summers, H. (GB)
Tskhakaya, David (UFP-V) ORCID
Schmid, K. (DE)Number of authors 28 Article number 014057 Source Title Physica Scripta. - : Institute of Physics Publishing - ISSN 0031-8949
Roč. 2020, T171 (2020)Number of pages 8 s. Language eng - English Country SE - Sweden Keywords 3d monte carlo ero ; Ero2.0 ; Linear plasma device ; Molybdenum ; Sputtering ; Surface morphology ; Surface roughness Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000520000600057 EID SCOPUS 85084660218 DOI 10.1088/1402-4896/ab5810 Annotation The surface morphology of plasma-facing components (PFCs) and its evolution during plasma irradiation has been shown to have a significant effect on the erosion and subsequent transport of sputtered particles in plasma. This in turn can influence the resulting lifetime of PFCs. A model for treatment of the effect of surface roughness on the erosion of PFCs has recently been incorporated into the three-dimensional Monte Carlo code ERO2.0. First simulations have confirmed a significant influence of the assumed surface roughness (for both regular and stochastic numerically constructed samples) on both the effective sputtering yields Y eff and the effective angular distributions of sputtered particles. In this study, a series of experiments at the linear plasma device PSI-2 are conducted to test the effect of surface roughness on the sputtering parameters. Graphite samples prepared with a 100 nm molybdenum layer with various surface roughness characteristic sizes (R a = 110 nm, 280 nm, 600 nm and R a < 20 nm) were exposed to a helium plasma in the PSI-2 linear plasma device at a magnetic field B = 0.1 T. These PSI-2 experiments were simulated using ERO2.0 with a surface morphology model. Simulations are able to reproduce the experimentally observed significant suppression of erosion for higher R a values. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2021 Electronic address https://iopscience.iop.org/article/10.1088/1402-4896/ab5810
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