| 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
Interaction of candidate plasma facing materials with tokamak plasma in COMPASS
Abstract
The interaction of tokamak plasma with several materials considered for the plasma facing components of future fusion devices was studied in a small-size COMPASS tokamak. These included mainly tungsten as the prime candidate and chromium steel as an alternative whose suitability was to be assessed. For the experiments, thin coatings of tungsten, P92 steel and nickel on graphite substrates were prepared by arcdischarge sputtering. The samples were exposed to hydrogen and deuterium plasma discharges in the COMPASS tokamak in two modes: a) short exposure (several discharges) on a manipulator in the proximity of the separatrix, close to the central column, and b) long exposure (several months) at the column, aligned with the other graphite tiles. During the discharges, standard plasma diagnostics were used and a local emission of spectral lines in the visible near ultraviolet regions, corresponding to the material erosion, was monitored. Before and after the plasma exposures, the sample surfaces were observed using scanning electron microscopy, the coatings thickness was measured using Rutherford backscattering spectroscopy, and the concentration profiles of hydrogen and deuterium were measured by elastic recoil detection analysis. The uniformity of the coatings and their thickness was verified before the exposure. After the exposure, no reduction of the thickness was observed, indicating the absence of ‘global’ erosion. Erosion was observed only in isolated spots, and attributed to unipolar arcing. Slightly larger erosion was found on steel coatings compared to the tungsten ones. Incorporation of deuterium in a thin surface layer was observed, in dependence on the exposure mode. Additionally, boron enrichment of the long-exposure samples was observed, as a result of the tokamak chamber boronization