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@ARTICLE{Spilker:280447,
      author       = {Spilker, Benjamin and Linke, Jochen and Pintsuk, Gerald and
                      Wirtz, Marius},
      title        = {{I}mpact of the surface quality on the thermal shock
                      performance of beryllium armor tiles for first wall
                      applications},
      journal      = {Fusion engineering and design},
      volume       = {109-111},
      number       = {Part B},
      issn         = {0920-3796},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2016-00221},
      pages        = {1692–1696},
      year         = {2015},
      abstract     = {Beryllium will be applied as first wall armor material in
                      ITER. The armor has to sustain high steady state and
                      transient power fluxes. For transient events like edge
                      localized modes, these transient power fluxes rise up to 1.0
                      GW m−2 with a duration of 0.5–0.75 ms in the divertor
                      region and a significant fraction of this power flux is
                      deposited on the first wall as well. In the present work,
                      the reference beryllium grade for the ITER first wall
                      application S-65 was prepared with various surface
                      conditions and subjected to transient power fluxes (thermal
                      shocks) with ITER relevant loading parameters. After 1000
                      thermal shocks, a crucial destruction of the entire loaded
                      area was observed and linked to the stress accelerated grain
                      boundary oxidation (SAGBO)/dynamic embrittlement (DE)
                      effect. Furthermore, the study revealed that the majority of
                      the thermally induced cracks formed between 1 and 10 pulses
                      and then grew wider and deeper with increasing pulse number.
                      The surface quality did not influence the cracking behavior
                      of beryllium in any detectable way. However, the polished
                      surface demonstrated the highest resistance against the
                      observed crucial destruction mechanism.},
      cin          = {IEK-2 / IEK-4},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-2-20101013 / I:(DE-Juel1)IEK-4-20101013},
      pnm          = {174 - Plasma-Wall-Interaction (POF3-174) / HITEC -
                      Helmholtz Interdisciplinary Doctoral Training in Energy and
                      Climate Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-174 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000382422100117},
      doi          = {10.1016/j.fusengdes.2015.10.028},
      url          = {https://juser.fz-juelich.de/record/280447},
}