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100 1 _ |a Hellwig, Maren
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245 _ _ |a Impact of Surface Roughness on Ion-Surface Interactions Studied with Energetic Carbon Ions 13C+ on Tungsten Surfaces
260 _ _ |a Basel
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520 _ _ |a The effect of surface roughness on angular distributions of reflected and physically sputtered particles is investigated by ultra-high vacuum (UHV) ion-surface interaction experiments. For this purpose, a smooth (Ra = 5.9 nm) and a rough (Ra = 20.5 nm) tungsten (W) surface were bombarded with carbon ions 13C+ under incidence angles of 30° and 80°. Reflected and sputtered particles were collected on foils to measure the resulting angular distribution as a function of surface morphology. For the qualitative and quantitative analysis, secondary ion mass spectrometry (SIMS) and nuclear reaction analysis (NRA) were performed. Simulations of ion-surface interactions were carried out with the SDTrimSP (Static Dynamic Transport of Ions in Matter Sputtering) code. For rough surfaces, a special routine was derived and implemented. Experimental as well as calculated results prove a significant impact of surface roughness on the angular distribution of reflected and sputtered particles. It is demonstrated that the effective sticking of C on W is a function of the angle of incidence and surface morphology. It is found that the predominant ion-surface interaction process changes with fluence
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700 1 _ |a Köppen, Martin
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700 1 _ |a Hiller, Albert
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700 1 _ |a Koslowski, Hans
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700 1 _ |a Litnovsky, Andrey
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700 1 _ |a Schmid, Klaus
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700 1 _ |a Schwab, Christian
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700 1 _ |a De Souza, Roger
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773 _ _ |a 10.3390/condmat4010029
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|t Condensed Matter
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