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@ARTICLE{Dhard:873519,
author = {Dhard, Chandra Prakash and Mayer, Matej and Brezinsek,
Sebastijan and Masuzaki, Suguru and Motojima, Gen and
König, Ralf and Pedersen, Thomas Sunn and Neu, Rudolf and
Hathiramani, Dag and Krause, Marco and Ehrke, Gunnar and
Ruset, Cristian and Schwarz-Selinger, Thomas and Balden,
Martin and Burwitz, Vassily Vadimovitch and Coenen, Jan
Willem and Linsmeier, Christian and Naujoks, Dirk and
Neubauer, Olaf and Rack, Michael and Tokitani, Masayuki and
Oelmann, Jannis and Li, Cong and Rasinski, Marcin and
Höschen, Daniel and Yajima, Miyuki},
title = {{E}rosion and deposition investigations on {W}endelstein
7-{X} first wall components for the first operation phase in
divertor configuration},
journal = {Fusion engineering and design},
volume = {146},
number = {Part A},
issn = {0920-3796},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2020-00787},
pages = {242 - 245},
year = {2019},
abstract = {In the stellarator Wendelstein 7-X with its twisted 3D
magnetic field geometry, studies of material migration with
respect to first wall components become very important in
view of the envisioned long-pulse operation. A variety of
erosion/deposition samples were installed on the
plasma-facing components exposed at three different nominal
heat load levels between 0.1 and 10 MW/m2. After the first
successful operation phase in divertor configuration, all
the probes at higher and lower load levels were removed,
whereas at the intermediate load levels, 352 out of 30 000
screws have been exchanged at selected locations along the
toroidal and poloidal directions. The exchanged probes have
been analyzed by various measurement techniques. At the
higher load levels where the probes were installed within
the divertor, heavy erosion has been observed presumably at
the strike line positions. Both, erosion and deposition
phenomena have been found on the screw heads. The optical
reflection measurement profile of the whole plasma vessel
show the deposition patterns at similar locations in all the
five modules. At the low load level, the Si-wafer probes are
under investigation.},
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:000488307400055},
doi = {10.1016/j.fusengdes.2018.12.031},
url = {https://juser.fz-juelich.de/record/873519},
}