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@ARTICLE{Lemahieu:279574,
author = {Lemahieu, Nathan and Greuner, Henri and Linke, Jochen and
Maier, Hans and Pintsuk, Gerald and Van Oost, Guido and
Wirtz, Marius},
title = {{S}ynergistic {E}ffects of {ELM}s and {S}teady {S}tate {H}
and {H}/{H}e {I}rradiation on {T}ungsten},
journal = {Fusion engineering and design},
volume = {98-99},
issn = {0920-3796},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2015-07458},
pages = {2020 - 2024},
year = {2015},
abstract = {To investigate synergistic effects of high heat flux
loading on H and H/He loaded tungsten surfaces, specimens
were exposed to a 30 keV steady-state H or H/He beam and
subsequently loaded with an electron beam to simulate ELMs.
The heat flux during the H and H/He loading was 10.5 MW
m−2, while a 2 × 1025 m−2 fluence was reached. After
exposure, all specimens exhibited an altered surface
morphology. The H/He samples with a surface temperature of
1000 °C and 1500 °C had a multitude of surface extrusions.
Afterwards the particle loaded samples were exposed to 100
ELM-like pulses around the material's damage threshold.
Transient heat fluxes of 190 MW m−2 and 380 MW m−2 were
applied at room temperature and 400 °C for a duration of 1
ms. Post-mortem analysis showed no deterioration of thermal
shock resistance in comparison with polished material. For
some tests the reference specimens roughened or cracked
while the H or H/He exposed material had no damage. The
H-content and the H/He-induced cavities and/or extrusions
are suggested as two potential causes for this change in
material behaviour.},
cin = {IEK-2 / IEK-4},
ddc = {620},
cid = {I:(DE-Juel1)IEK-2-20101013 / I:(DE-Juel1)IEK-4-20101013},
pnm = {174 - Plasma-Wall-Interaction (POF3-174) / HITEC -
Helmholtz Interdisciplinary Doctoral Training in Energy and
Climate Research (HITEC) (HITEC-20170406)},
pid = {G:(DE-HGF)POF3-174 / G:(DE-Juel1)HITEC-20170406},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000363344900216},
doi = {10.1016/j.fusengdes.2015.06.051},
url = {https://juser.fz-juelich.de/record/279574},
}