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@ARTICLE{Li:891439,
      author       = {Li, Cong and Gierse, Niels and Oelmann, Jannis and
                      Brezinsek, Sebastijan and Rasinski, Marcin and Prakash
                      Dhard, Chandra and Sunn Pedersen, Thomas and König, Ralf
                      and Liang, Yunfeng and Ding, Hongbin and Linsmeier,
                      Christian},
      title        = {{L}aser-induced breakdown spectroscopy for {W}endelstein
                      7-{X} stellarator limiter tile analysis},
      journal      = {Physica scripta},
      volume       = {T170},
      issn         = {1402-4896},
      address      = {Stockholm},
      publisher    = {The Royal Swedish Academy of Sciences},
      reportid     = {FZJ-2021-01521},
      pages        = {014004 -},
      year         = {2017},
      abstract     = {Laser-induced breakdown spectroscopy (LIBS) is a
                      well-established elemental composition analysis method as
                      well as one of the most promising candidates for in situ
                      first wall diagnosis of fusion devices. In this work,
                      limiter graphite tiles, which were exposed in the initial
                      operational phase (OP1.1) of the Wendelstein 7-X stellarator
                      to He and H plasma, are analyzed ex situ by LIBS employing a
                      picosecond pulsed laser for the first time and compared with
                      post mortem analysis techniques. Depth profiles of each
                      element and 2D profile of the ratio of H and C atoms on the
                      surface are investigated. Both H content and retention depth
                      on the deposition dominated zone are higher than on the
                      erosion dominated zone due to the formation of C-H
                      co-deposition layer. The results from LIBS are in agreement
                      with those from the cross-sectional scanning electron
                      microscopic image and electron dispersive x-ray
                      spectroscopy.},
      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:000414120500004},
      doi          = {10.1088/0031-8949/2017/T170/014004},
      url          = {https://juser.fz-juelich.de/record/891439},
}