% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Oelmann:863625,
      author       = {Oelmann, Jannis and Li, Cong and Brezinsek, Sebastijan and
                      Rasinski, Marcin and Dhard, Chandra Prakash and König, Ralf
                      and Winters, Victoria and Linsmeier, Christian},
      title        = {{D}epth resolved analysis of hydrogen in {W}7-{X} graphite
                      components using laser-induced ablation-quadrupole mass
                      spectrometry ({LIA}-{QMS})},
      journal      = {Nuclear materials and energy},
      volume       = {18},
      issn         = {2352-1791},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2019-03636},
      pages        = {153 - 158},
      year         = {2019},
      abstract     = {A deep understanding of the plasma-wall interaction
                      processes in fusion devices like Wendelstein 7-X is
                      necessary for an efficient plasma operation and a long
                      lifetime of the plasma-facing components.In this work we
                      present an approach employing residual gas analysis after
                      picosecond laser-induced ablation (ps LIA-QMS) of graphite
                      limiter tiles, exposed in the first plasma operational phase
                      of Wendelstein 7-X, for depth-resolved and quantitative
                      hydrogen content analysis. A series of poloidal and toroidal
                      locations are analyzed at three of the five limiters,
                      showing up to 2.3 × 1022 hydrogen atoms/m2 in
                      net-deposition areas after a total plasma exposure of about
                      311 s in mixed hydrogen and helium operation. Shallow
                      implantation of hydrogen is observed in erosion zones, where
                      a low fuel content is present due to the high surface
                      temperature during plasma operation. The hydrogen content
                      spans between (1.1 and 3.7) × 1021 hydrogen atoms/m2 in
                      the net-erosion areas. Moreover, oxygen has been analyzed
                      and its appearance in both the implantation and deposition
                      zone was verified. Results are compared to thermal
                      desorption spectrometry and to simultaneously performed
                      laser-induced breakdown spectroscopy (LIBS) measurements.},
      cin          = {IEK-4 / IEK-6},
      ddc          = {624},
      cid          = {I:(DE-Juel1)IEK-4-20101013 / I:(DE-Juel1)IEK-6-20101013},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113)},
      pid          = {G:(DE-HGF)POF3-113},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000460107500027},
      doi          = {10.1016/j.nme.2018.12.019},
      url          = {https://juser.fz-juelich.de/record/863625},
}