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@ARTICLE{Ogorodnikova:837282,
author = {Ogorodnikova, O. V. and Zhou, Z. and Sugiyama, K. and
Balden, M. and Pintsuk, G. and Gasparyan, Yu. and Efimov,
V.},
title = {{S}urface modification and deuterium retention in
reduced-activation steels under low-energy deuterium plasma
exposure. {P}art {II}: steels pre-damaged with 20 {M}e{V}
{W} ions and high heat flux},
journal = {Nuclear fusion},
volume = {57},
number = {3},
issn = {1741-4326},
address = {Vienna},
publisher = {IAEA},
reportid = {FZJ-2017-06251},
pages = {036011 -},
year = {2017},
abstract = {The reduced-activation ferritic/martensitic (RAFM) steels
including Eurofer (9Cr) and oxide dispersion strengthened
(ODS) steels by the addition of Y2O3 particles investigated
in Part I were pre-damaged either with 20 MeV W ions at room
temperature at IPP (Garching) or with high heat flux at FZJ
(Juelich) and subsequently exposed to low energy
(~20–200 eV per D) deuterium (D) plasma up to a fluence
of 2.9 × 1025 D m−2 in the temperature range
from 290 K to 700 K. The pre-irradiation with 20 MeV W
ions at room temperature up to 1 displacement per atom (dpa)
has no noticeable influence on the steel surface morphology
before and after the D plasma exposure. The pre-irradiation
with W ions leads to the same concentration of deuterium in
all kinds of investigated steels, regardless of the presence
of nanoparticles and Cr content. It was found that (i) both
kinds of irradiation with W ions and high heat flux increase
the D retention in steels compared to undamaged steels and
(ii) the D retention in both pre-damaged and undamaged
steels decreases with a formation of surface roughness under
the irradiation of steels with deuterium ions with incident
energy which exceeds the threshold of sputtering. The
increase in the D retention in RAFM steels pre-damaged
either with W ions (damage up to ~3 µm) or high heat flux
(damage up to ~10 µm) diminishes with increasing the
temperature. It is important to mention that the near
surface modifications caused by either implantation of high
energy ions or a high heat flux load, significantly affect
the total D retention at low temperatures or low fluences
but have a negligible impact on the total D retention at
elevated temperatures and high fluences because, in these
cases, the D retention is mainly determined by bulk
diffusion.},
cin = {IEK-4},
ddc = {530},
cid = {I:(DE-Juel1)IEK-4-20101013},
pnm = {174 - Plasma-Wall-Interaction (POF3-174)},
pid = {G:(DE-HGF)POF3-174},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000391470100004},
doi = {10.1088/1741-4326/57/3/036011},
url = {https://juser.fz-juelich.de/record/837282},
}