TY  - JOUR
AU  - Eksaeva, Alina
AU  - Borodin, D.
AU  - Romazanov, J.
AU  - Kreter, A.
AU  - Pospieszczyk, A.
AU  - Dickheuer, S.
AU  - Möller, S.
AU  - Göths, B.
AU  - Rasinski, M.
AU  - Knoche, U.
AU  - Terra, A.
AU  - Kirschner, A.
AU  - Borodkina, I.
AU  - Eichler, M.
AU  - Unterberg, B.
AU  - Brezinsek, S.
AU  - Linsmeier, Ch
AU  - Vassallo, E.
AU  - Pedroni, M.
AU  - Passoni, M.
AU  - Dellasega, D.
AU  - Sala, M.
AU  - Romeo, F.
AU  - Henderson, S.
AU  - O’Mullane, M.
AU  - Summers, H.
AU  - Tskhakaya, D.
AU  - Schmid, K.
TI  - ERO2.0 modelling of the effects of surface roughness on molybdenum erosion and redeposition in the PSI-2 linear plasma device
JO  - Physica scripta
VL  - T171
SN  - 1402-4896
CY  - Stockholm
PB  - The Royal Swedish Academy of Sciences
M1  - FZJ-2021-01499
SP  - 014057 -
PY  - 2020
AB  - 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 Yeff 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 (Ra = 110 nm, 280 nm, 600 nm and Ra < 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 Ra values.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000520000600057
DO  - DOI:10.1088/1402-4896/ab5810
UR  - https://juser.fz-juelich.de/record/891414
ER  -