%0 Journal Article
%A Hellwig, Maren
%A Köppen, Martin
%A Hiller, Albert
%A Koslowski, Hans
%A Litnovsky, Andrey
%A Schmid, Klaus
%A Schwab, Christian
%A De Souza, Roger
%T Impact of Surface Roughness on Ion-Surface Interactions Studied with Energetic Carbon Ions 13C+ on Tungsten Surfaces
%J Condensed Matter
%V 4
%N 1
%@ 2410-3896
%C Basel
%I MDPI
%M FZJ-2019-03575
%P 29 -
%D 2019
%X 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
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000464287700001
%R 10.3390/condmat4010029
%U https://juser.fz-juelich.de/record/863536