TY  - JOUR
AU  - Hellwig, Maren
AU  - Köppen, Martin
AU  - Hiller, Albert
AU  - Koslowski, Hans
AU  - Litnovsky, Andrey
AU  - Schmid, Klaus
AU  - Schwab, Christian
AU  - De Souza, Roger
TI  - Impact of Surface Roughness on Ion-Surface Interactions Studied with Energetic Carbon Ions 13C+ on Tungsten Surfaces
JO  - Condensed Matter
VL  - 4
IS  - 1
SN  - 2410-3896
CY  - Basel
PB  - MDPI
M1  - FZJ-2019-03575
SP  - 29 -
PY  - 2019
AB  - 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
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000464287700001
DO  - DOI:10.3390/condmat4010029
UR  - https://juser.fz-juelich.de/record/863536
ER  -