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@ARTICLE{Rasinski:827146,
author = {Rasinski, M. and Kreter, A. and Torikai, Y. and Linsmeier,
Ch.},
title = {{T}he microstructure of tungsten exposed to {D} plasma with
different impurities},
journal = {Nuclear materials and energy},
volume = {12},
issn = {2352-1791},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2017-01344},
pages = {302-306},
year = {2017},
abstract = {In this study the effect of impurities in deuterium plasma
on the tungsten microstructure is investigated. W samples
were exposed in the linear plasma generator PSI-2 at a
sample temperature of 500 K with an incident ion flux of
about 1022 m−2s−1, an incident ion fluence of 5 × 1025
m−2 and an incident ion energy of 70 eV. Samples were
exposed to pure D+ plasma and with additional impurities of
He $(3\%),$ Ar $(7\%),$ Ne $(10\%)$ or N $(5\%).$ After the
PSI-2 exposure a part of each sample was additionally loaded
with tritium to measure the tritium uptake using the imaging
plate technique.The surface morphology was investigated
using scanning electron microscope (SEM) combined with a
focused ion beam (FIB) utilized for cross-sectioning and
thin lamella preparation for the transmission electron
microscope (TEM) analysis.Blistering with grain orientation
dependence was observed on all exposed samples. Most
pronounced blistering is reported for grains with
orientation close to (111). The addition of Ar or Ne results
in surface erosion with different yields depending on grain
orientation. Highest erosion yield is observed for grains
with orientation close to (100). Large blisters are present
but show signatures of erosion. Less pronounced erosion is
visible when adding N. The highest uptake of tritium was
reported for the sample exposed to D+He plasma which
corresponds to the largest – 18 nm, near surface damage
zone revealed by TEM. Lowest tritium accumulation was
observed for samples exposed to D+Ar and D+Ne plasmas, which
corresponds to the shallowest near surface damage zone, as
confirmed by TEM.},
cin = {IEK-4},
ddc = {333.7},
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:000417293300044},
doi = {10.1016/j.nme.2016.11.001},
url = {https://juser.fz-juelich.de/record/827146},
}