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@ARTICLE{Oelmann:889122,
      author       = {Oelmann, Jannis and Hu, Zhenhua and Li, Cong and Sun,
                      Liying and Liu, Jiamin and Ding, Fang and Wang, Liang and
                      Brezinsek, Sebastijan and Ding, Rui and Ding, Hongbin and
                      Luo, Guangnan and Chen, Junlin and Team, the EAST},
      title        = {{A}nalyses of deuterium retention in tungsten and graphite
                      first wall materials by laser-induced ablation spectroscopy
                      on {EAST}},
      journal      = {Fusion engineering and design},
      volume       = {162},
      issn         = {0920-3796},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2021-00047},
      pages        = {112108 -},
      year         = {2021},
      abstract     = {Plasma-wall interactions at the first wall in fusion
                      experimental devices are critical for the life time of
                      plasma-facing components and tokamak operation. In-situ
                      measurements of these plasma-wall interaction processes are
                      required in long pulse devices in order to understand better
                      the underlying mechanisms as well as monitoring of the
                      tritium content of the first wall as an immediate safety
                      application. In this work we present measurements of the
                      deuterium retention in the first wall of EAST using
                      laser-induced ablation spectroscopy. The diagnostic is
                      applied during plasma operation and the dynamic retention
                      for graphite and tungsten as plasma-facing materials are
                      compared, showing more than three times higher short-term
                      retention in graphite than in tungsten. Laser-based analysis
                      is applied during a shift of the vertical positions of the
                      plasma column in limited as well as in the start-up phase of
                      discharges in diverted magnetic configuration. Plasma core
                      densities of ne = (1.5–3.2)  × 1019/m3 are chosen
                      to vary the ion flux to the first wall and study saturation
                      effects of deuterium on the surface first wall materials
                      during tokamak plasma operation. A linear dependence of the
                      retention from ion fluence is observed for graphite as PFC
                      up to 3 × 1018D+/cm2, followed by a constant retention
                      up to fluences of 3.5 × 1019D+/cm2 for nearby first
                      wall temperatures of TPFC ≈ 350 K.},
      cin          = {IEK-4},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-4-20101013},
      pnm          = {134 - Plasma-Wand-Wechselwirkung (POF4-134)},
      pid          = {G:(DE-HGF)POF4-134},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000603550100004},
      doi          = {10.1016/j.fusengdes.2020.112108},
      url          = {https://juser.fz-juelich.de/record/889122},
}