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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 × 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
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 × 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
Temperature-dependent in-situ LEIS measurement of W surface enrichment by 250 eV D sputtering of EUROFER
H.R. Koslowski (author) / S.R. Bhattacharyya (author) / P. Hansen (author) / Ch. Linsmeier (author) / M. Rasiński (author) / P. Ström (author)
2018
Article (Journal)
Electronic Resource
Unknown
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