TY  - JOUR
AU  - Koslowski, H. R.
AU  - Bhattacharyya, S. R.
AU  - Hansen, P.
AU  - Linsmeier, Ch.
AU  - Rasiński, M.
AU  - Ström, P.
TI  - Temperature-dependent in-situ LEIS measurement of W surface enrichment by 250 eV D sputtering of EUROFER
JO  - Nuclear materials and energy
VL  - 16
SN  - 2352-1791
CY  - Amsterdam [u.a.]
PB  - Elsevier
M1  - FZJ-2018-04554
SP  - 181 - 190
PY  - 2018
AB  - 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 2e18 m$^{-2}$s$^{-1}$ and maximum fluence up to 1.1e23 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 allows to determine an upper limit of 1.6 eV for the diffusion activation energy of tungsten in EUROFER.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000442226800028
DO  - DOI:10.1016/j.nme.2018.07.001
UR  - https://juser.fz-juelich.de/record/850780
ER  -