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@ARTICLE{Jiang:873586,
      author       = {Jiang, X. and Sergienko, G. and Schweer, B. and Möller, S.
                      and Freisinger, M. and Kreter, A. and Brezinsek, S. and
                      Linsmeier, Ch.},
      title        = {{A}n upgraded {LIBS} system on linear plasma device {PSI}-2
                      for in situ diagnostics of plasma-facing materials},
      journal      = {Fusion engineering and design},
      volume       = {146},
      number       = {Part A},
      issn         = {0920-3796},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2020-00829},
      pages        = {96 - 99},
      year         = {2019},
      abstract     = {Laser induced breakdown spectroscopy (LIBS) is used to
                      detect and monitor the D and H content on the W surface due
                      to its capability of fast direct in situ measurement in
                      extreme environment (e.g., vacuum, magnetic field, long
                      distance, complex geometry). A new LIBS system has been set
                      up on the linear plasma device PSI-2 to perform in situ,
                      real-time and remote monitoring of deuterium retention on
                      the target surface. The new system is an upgraded version of
                      the previous LIBS system [1] and is improved in several
                      ways. The laser profile is improved and better focused into
                      the chamber, the emission light collecting optics are more
                      efficient. In addition, the timing and triggering system is
                      updated and two different spectrometers are optimised for
                      blue and red regime on the spectrum respectively. One of the
                      spectrometers with Littrow configuration is dedicated to the
                      detection of hydrogen and deuterium Balmer-alpha lines. A
                      number of key parameters including laser energy, the
                      (de)focusing of the laser beam, the delay time of image
                      intensifier (MCP) are investigated and improved for the new
                      system. The measurement by the new LIBS system is then
                      compared to thermal desorption spectroscopy (TDS) and
                      nuclear reaction analysis (NRA) results. The overall LIBS
                      sensitivity and measurement accuracy are greatly improved,
                      the time evolution of D, H content on W samples is studied
                      before, during and after plasma-off point in the scales of
                      seconds, minutes and hours.},
      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:000488307400023},
      doi          = {10.1016/j.fusengdes.2018.11.044},
      url          = {https://juser.fz-juelich.de/record/873586},
}