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@ARTICLE{Effenberg:867592,
      author       = {Effenberg, F. and Feng, Y. and Schmitz, O. and Frerichs, H.
                      and Bozhenkov, S. A. and Hölbe, H. and König, R. and
                      Krychowiak, M. and Pedersen, T. Sunn and Reiter, D. and
                      Stephey, L.},
      title        = {{N}umerical investigation of plasma edge transport and
                      limiter heat fluxes in {W}endelstein 7-{X} startup plasmas
                      with {EMC}3-{EIRENE}},
      journal      = {Nuclear fusion},
      volume       = {57},
      number       = {3},
      issn         = {1741-4326},
      address      = {Vienna},
      publisher    = {IAEA},
      reportid     = {FZJ-2019-06213},
      pages        = {036021 -},
      year         = {2017},
      abstract     = {The results of a first systematic assessment of plasma edge
                      transport processes for the limiter startup configuration at
                      Wendelstein 7-X are presented. This includes an
                      investigation of transport from intrinsic and externally
                      injected impurities and their impact on the power balance
                      and limiter heat fluxes. The fully 3D coupled plasma fluid
                      and kinetic neutral transport Monte Carlo code EMC3-EIRENE
                      is used.The analysis of the magnetic topology shows that the
                      poloidally and toroidally localized limiters cause a 3D
                      helical scrape-off layer (SOL) consisting of magnetic flux
                      tubes of three different connection lengths L C. The
                      transport in the helical SOL is governed by L C as
                      topological scale length for the parallel plasma loss
                      channel to the limiters. A clear modulation of the plasma
                      pressure with L C is seen. The helical flux tube topology
                      results in counter streaming sonic plasma flows.The
                      heterogeneous SOL plasma structure yields an uneven limiter
                      heat load distribution with localized peaking. Assuming
                      spatially constant anomalous transport coefficients,
                      increasing plasma density yields a reduction of the maximum
                      peak heat loads from 12 MWm−2 to 7.5 MWm−2 and a
                      broadening of the deposited heat fluxes. ...},
      cin          = {IEK-4},
      ddc          = {620},
      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:000394509200001},
      doi          = {10.1088/1741-4326/aa4f83},
      url          = {https://juser.fz-juelich.de/record/867592},
}