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@ARTICLE{Tokar:839876,
      author       = {Tokar, Mikhail},
      title        = {{A}n assessment for the erosion rate of {DEMO} first wall},
      journal      = {Nuclear fusion},
      volume       = {58},
      number       = {1},
      issn         = {1741-4326},
      address      = {Vienna},
      publisher    = {IAEA},
      reportid     = {FZJ-2017-07455},
      pages        = {016016 -},
      year         = {2018},
      abstract     = {In a fusion reactor a significant fraction of plasma
                      particles lost from the confined volume will reach the
                      vessel wall. The recombination of these charged species,
                      electrons and ions of hydrogen isotopes, is a source of
                      neutral molecules and atoms, recycling back into the plasma.
                      Here they participate, in particular, in charge-exchange
                      (c-x) collisions with the plasma ions and, as a result,
                      atoms of high energies with chaotically oriented velocities
                      are generated. A significant fraction of these hot neutrals
                      will hit the wall, leading, as well as the outflowing fuel
                      and impurity ions, to its erosion, limiting the reactor
                      operation time. The rate of the wall erosion in DEMO is
                      assessed by applying a one-dimensional model which takes
                      into account the transport of charged and neutral species
                      across the flux surfaces in the main part of the scrape-off
                      layer, beyond the X-point vicinity and divertor, and by
                      considering the shift of the centers of flux surfaces, their
                      elongation and triangularity. Atoms generated by c-x of
                      recycling neutrals are modeled kinetically to define firmly
                      their energy spectrum, being of particular importance for
                      the erosion assessment. It is demonstrated the erosion rate
                      of the DEMO wall armor of tungsten will have a pronounced
                      ballooning character with a significant maximum of $0.3$ mm
                      per full power year at the low field side, decreasing with
                      an increase in the anomalous perpendicular transport in the
                      'far' SOL or the plasma density at the separatrix.},
      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:000428754900002},
      doi          = {10.1088/1741-4326/aa92dd},
      url          = {https://juser.fz-juelich.de/record/839876},
}