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@ARTICLE{DiGenova:904043,
author = {Di Genova, S. and Gallo, A. and Fedorczak, N. and Yang, H.
and Ciraolo, G. and Romazanov, J. and Marandet, Y. and
Bufferand, H. and Guillemaut, C. and Gunn, J. P. and Gil, C.
and Serre, E. and Brezinsek, S. and Team, the WEST},
title = {{M}odelling of tungsten contamination and screening in
{WEST} plasma discharges},
journal = {Nuclear fusion},
volume = {61},
number = {10},
issn = {0029-5515},
address = {Vienna},
publisher = {IAEA},
reportid = {FZJ-2021-05613},
pages = {106019 -},
year = {2021},
note = {kein Zugriff auf Postprint},
abstract = {The WEST experiment is currently operating with tungsten
plasma-facing components and testing ITER-like divertor
monoblocks. In order to support WEST experiments
interpretation, numerical analyses were carried out.
Starting from WEST experimental data, realistic background
plasma conditions were reproduced through SolEdge-EIRENE and
used as input for ERO2.0 simulations to investigate tungsten
migration. Tungsten contamination due to the different
plasma-facing components was modelled under different plasma
conditions, highlighting a non-negligible contribution of
tungsten coming from the tokamak main chamber. Tungsten
penetration factor was computed and used as an indication
for tungsten screening by the background plasma at the
different tokamak plasma-facing components. Simulations
showed the main chamber components to be very weakly
screened. Light impurities charge was showed to influence
not only tungsten sputtering, but also its probability to
enter the confined plasma. Simulations results indicated
that even when the tungsten source is not heavily influenced
by self-sputtering, contamination of the confined plasma can
be strongly impacted by it in low density background plasma
conditions. Finally, a one-to-one comparison between
tungsten visible spectroscopy at the lower divertor from
experimental data and from synthetic diagnostics was
performed, showing that it is possible to reproduce a
realistic lower divertor signal following experimental
evidence on light impurities asymmetry between the targets.},
cin = {IEK-4},
ddc = {620},
cid = {I:(DE-Juel1)IEK-4-20101013},
pnm = {134 - Plasma-Wand-Wechselwirkung (POF4-134)},
pid = {G:(DE-HGF)POF4-134},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000696374100001},
doi = {10.1088/1741-4326/ac2026},
url = {https://juser.fz-juelich.de/record/904043},
}