| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Hakola, Antti
VTT Technical Research Centre of Finland
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2023Deuterium and helium retention in W and W-Ta coatings irradiated with energetic ion beamscitations
- 2021LIBS applicability for investigation of re-deposition and fuel retention in tungsten coatings exposed to pure and nitrogen-mixed deuterium plasmas of Magnum-PSIcitations
- 2021LIBS applicability for investigation of re-deposition and fuel retention in tungsten coatings exposed to pure and nitrogen-mixed deuterium plasmas of Magnum-PSIcitations
- 2021Influence of surface roughness on the sputter yield of Mo under keV D ion irradiationcitations
- 2020Impact of H-mode plasma operation on predamaged tungsten divertor tiles in ASDEX Upgradecitations
- 2020Impact of H-mode plasma operation on predamaged tungsten divertor tiles in ASDEX Upgradecitations
- 2019Influence of surface roughness on sputtering of Mo under keV D ions irradiation
- 2019Influence of surface roughness on sputtering of Mo under keV D ions irradiation
- 2018Production of ITER-relevant Be-containing laboratory samples for fuel retention investigations
- 2017Interaction of candidate plasma facing materials with tokamak plasma in COMPASScitations
- 2016Thermo-mechanical properties of W/Mo markers coatings deposited on bulk Wcitations
- 2016Thermo-mechanical properties of W/Mo markers coatings deposited on bulk Wcitations
- 2014First results and surface analysis strategy for plasma-facing components after JET operation with the ITER-like wallcitations
- 2012Pulsed laser deposition using diffractively shaped excimer-laser beamscitations
- 2010First Mirrors Test in JET for ITERcitations
- 2006Thin-film deposition using laser ablation : application to ferromagnetic shape-memory materials and methods for spatial shaping of laser beams
Places of action
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article
Influence of surface roughness on the sputter yield of Mo under keV D ion irradiation
Abstract
In this work the influence of surface roughness on the sputter yield of Mo under keV D ion bombardment was investigated for different impact angles. For this purpose, thin films of Mo (~ 120 nm) were deposited by pulsed laser deposition onto graphite substrates with varying surface roughness (Ra ranging from 5 nm to 2–3 μm). The as-deposited samples were irradiated at room temperature by 3 keV D3+ ions originating from an electron-cyclotron-resonance ion gun. Samples were exposed to D ions at angles between 0° and 70° and fluences in range of 1023 D/m2. The areal densities of the Mo marker layers were determined with Rutherford backscattering spectroscopy. For all the surfaces we observed a strong angular dependence of the sputter yield. For smooth and intermediate surface roughnesses, up to Ra ~ 280 nm, we obtained an increase of the sputter yield with the angle up to a factor of five compared to 0°. In contrast, at the highest surface roughness in the 2–3 μm range the sputtering yield decreases with increasing impact angle. The obtained data were compared to SDTrimSP-3D simulations. We obtained good agreement between the simulated and experimental sputter yield for surfaces for which we could provide high resolution atomic force microscopy (AFM) surface representations. As high-resolution surface mapping was not possible for surface roughness of 2–3 μm, we found large deviation between the calculation and the measured data. The combination of measured and simulated data represent important input for predicting the erosion rates of surfaces at inner walls of thermonuclear fusion devices, which are expected to change surface roughness over time by sustained plasma exposure.