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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},
}