Temperature-dependent in-situ LEIS measurement of W surface enrichment by 250 eV D sputtering of EUROFER
Tungsten surface enrichment of EUROFER steel by 250 eV deuterium sputtering is in-situ measured using low energy He+ ion scattering spectroscopy. The samples are irradiated at various temperatures between 300 K and 800 K with a deuterium atom flux of 2 × 1018 m−2 s−1 and maximum fluence up to 1.1 × ...
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2018-08-01
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| Series: | Nuclear Materials and Energy |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179118300279 |
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doaj-d659d93debf348aab7a73c4dd17228c42020-11-25T01:43:58ZengElsevierNuclear Materials and Energy2352-17912018-08-0116181190Temperature-dependent in-situ LEIS measurement of W surface enrichment by 250 eV D sputtering of EUROFERH.R. Koslowski0S.R. Bhattacharyya1P. Hansen2Ch. Linsmeier3M. Rasiński4P. Ström5Corresponding author.; Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung – Plasmaphysik, Jülich 52428, GermanySurface Physics & Materials Science Division, Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata 700064, IndiaForschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung – Plasmaphysik, Jülich 52428, GermanyForschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung – Plasmaphysik, Jülich 52428, GermanyForschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung – Plasmaphysik, Jülich 52428, GermanyDepartment of Fusion Plasma Physics, School of Electrical Engineering and Computer Science, KTH Royal Institute of Technology, Stockholm SE-10044, SwedenTungsten surface enrichment of EUROFER steel by 250 eV deuterium sputtering is in-situ measured using low energy He+ ion scattering spectroscopy. The samples are irradiated at various temperatures between 300 K and 800 K with a deuterium atom flux of 2 × 1018 m−2 s−1 and maximum fluence up to 1.1 × 1023 m−2. The measurements at room temperature show a clear increase of tungsten surface density, but already at 520 K the observed enrichment is only half as large. At a temperature of 800 K no tungsten surface enrichment is detectable. The obtained data yield an upper limit of 1.6 eV for the diffusion activation energy of tungsten in EUROFER. Keywords: Low energy ion scattering (LEIS), EUROFER, Plasma-surface interaction, Preferential sputtering, W diffusion in Fe, Diffusion activation energyhttp://www.sciencedirect.com/science/article/pii/S2352179118300279 |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
H.R. Koslowski S.R. Bhattacharyya P. Hansen Ch. Linsmeier M. Rasiński P. Ström |
| spellingShingle |
H.R. Koslowski S.R. Bhattacharyya P. Hansen Ch. Linsmeier M. Rasiński P. Ström Temperature-dependent in-situ LEIS measurement of W surface enrichment by 250 eV D sputtering of EUROFER Nuclear Materials and Energy |
| author_facet |
H.R. Koslowski S.R. Bhattacharyya P. Hansen Ch. Linsmeier M. Rasiński P. Ström |
| author_sort |
H.R. Koslowski |
| title |
Temperature-dependent in-situ LEIS measurement of W surface enrichment by 250 eV D sputtering of EUROFER |
| title_short |
Temperature-dependent in-situ LEIS measurement of W surface enrichment by 250 eV D sputtering of EUROFER |
| title_full |
Temperature-dependent in-situ LEIS measurement of W surface enrichment by 250 eV D sputtering of EUROFER |
| title_fullStr |
Temperature-dependent in-situ LEIS measurement of W surface enrichment by 250 eV D sputtering of EUROFER |
| title_full_unstemmed |
Temperature-dependent in-situ LEIS measurement of W surface enrichment by 250 eV D sputtering of EUROFER |
| title_sort |
temperature-dependent in-situ leis measurement of w surface enrichment by 250 ev d sputtering of eurofer |
| publisher |
Elsevier |
| series |
Nuclear Materials and Energy |
| issn |
2352-1791 |
| publishDate |
2018-08-01 |
| description |
Tungsten surface enrichment of EUROFER steel by 250 eV deuterium sputtering is in-situ measured using low energy He+ ion scattering spectroscopy. The samples are irradiated at various temperatures between 300 K and 800 K with a deuterium atom flux of 2 × 1018 m−2 s−1 and maximum fluence up to 1.1 × 1023 m−2. The measurements at room temperature show a clear increase of tungsten surface density, but already at 520 K the observed enrichment is only half as large. At a temperature of 800 K no tungsten surface enrichment is detectable. The obtained data yield an upper limit of 1.6 eV for the diffusion activation energy of tungsten in EUROFER. Keywords: Low energy ion scattering (LEIS), EUROFER, Plasma-surface interaction, Preferential sputtering, W diffusion in Fe, Diffusion activation energy |
| url |
http://www.sciencedirect.com/science/article/pii/S2352179118300279 |
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