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@ARTICLE{Maviglia:897406,
      author       = {Maviglia, F. and Siccinio, M. and Bachmann, C. and Biel, W.
                      and Cavedon, M. and Fable, E. and Federici, G. and
                      Firdaouss, M. and Gerardin, J. and Hauer, V. and
                      Ivanova-Stanik, I. and Janky, F. and Kembleton, R. and
                      Militello, F. and Subba, F. and Varoutis, S. and Vorpahl,
                      C.},
      title        = {{I}mpact of plasma-wall interaction and exhaust on the
                      {EU}-{DEMO} design},
      journal      = {Nuclear materials and energy},
      volume       = {26},
      issn         = {2352-1791},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2021-03772},
      pages        = {100897 -},
      year         = {2021},
      abstract     = {In the present work, the role of plasma facing components
                      protection in driving the EU-DEMO design will be reviewed,
                      focusing on steady-state and, especially, on transients.
                      This work encompasses both the first wall (FW) as well as
                      the divertor. In fact, while the ITER divertor heat removal
                      technology has been adopted, the ITER FW concept has been
                      shown in the past years to be inadequate for EU-DEMO. This
                      is due to the higher foreseen irradiation damage level,
                      which requires structural materials (like Eurofer) able to
                      withstand more than 5 dpa of neutron damage. This solution,
                      however, limits the tolerable steady-state heat flux to ~1
                      MW/m2, i.e. a factor 3–4 below the ITER specifications.
                      For this reason, poloidally and toroidally discontinuous
                      protection limiters are implemented in EU-DEMO. Their role
                      consists in reducing the heat load on the FW due to charged
                      particles, during steady state and, more importantly, during
                      planned and off-normal plasma transients. Concerning the
                      divertor configuration, EU-DEMO currently assumes an
                      ITER-like, lower single null (LSN) divertor, with seeded
                      impurities for the dissipation of the power. However, this
                      concept has been shown by numerous simulations in the past
                      years to be marginal during steady-state (where a detached
                      divertor is necessary to maintain the heat flux below the
                      technological limit and to avoid excessive erosion) and
                      unable to withstand some relevant transients, such as large
                      ELMs and accidental loss of detachment. Various concepts,
                      deviating from the ITER design, are currently under
                      investigation to mitigate such risks, for example in-vessel
                      coils for strike point sweeping in case of reattachment, as
                      well as alternative divertor configurations. Finally, a
                      broader discussion on the impact of divertor protection on
                      the overall machine design is presented.},
      cin          = {IEK-4},
      ddc          = {624},
      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:000628782500029},
      doi          = {10.1016/j.nme.2020.100897},
      url          = {https://juser.fz-juelich.de/record/897406},
}