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@ARTICLE{Dekeyser:904042,
      author       = {Dekeyser, W. and Boerner, P. and Voskoboynikov, S. and
                      Rozhanksy, V. A. and Senichenkov, I. and Kaveeva, L. and
                      Veselova, I. and Vekshina, E. and Bonnin, X. and Pitts, R.
                      A. and Baelmans, M.},
      title        = {{P}lasma edge simulations including realistic wall geometry
                      with {SOLPS}-{ITER}},
      journal      = {Nuclear materials and energy},
      volume       = {27},
      issn         = {2352-1791},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2021-05612},
      pages        = {100999 -},
      year         = {2021},
      abstract     = {In plasma edge simulations using the SOLPS-ITER code, the
                      simulated Scrape-Off Layer plasma domain has historically
                      been restricted to magnetic flux surfaces contacting
                      divertor targets at both ends. We present here a newly
                      developed numerical solver for the B2.5 plasma solver in
                      SOLPS-ITER, allowing the numerical grid to be extended to
                      the true vessel boundaries. The new, unstructured Finite
                      Volume scheme can deal with arbitrary grids and magnetic
                      topologies in the 2D poloidal plane. It includes a correct
                      numerical treatment of possibly misaligned faces and cells
                      w.r.t. the magnetic field to cope with, for example, strong
                      divertor target shaping. The solver combines the benefits of
                      an accurate numerical separation of fast parallel and slow
                      radial transport, with a realistic description of the wall
                      geometry, and the possibility of local grid refinement to
                      capture sharp features in the Scrape-Off Layer flows.
                      Generalized sheath boundary conditions are presented that
                      can be imposed at all vessel boundaries, removing an
                      important modeling uncertainty related to the specification
                      of ad hoc decay length boundary conditions at the outer flux
                      surfaces. The resulting model is applied to an AUG
                      single-null case, a standard benchmark case for SOLPS-ITER.
                      We analyze in particular the impact of the extended plasma
                      model on upstream and divertor plasma conditions, and the
                      improved predictions of heat and particle loads to the main
                      chamber wall. The extended solver also allows for a much
                      improved qualitative agreement between fluid and kinetic
                      neutral simulations, because the fluid neutral solution,
                      which is obtained on the plasma grid, now also extends to
                      the true main chamber and divertor vessel boundaries.},
      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:000670923000005},
      doi          = {10.1016/j.nme.2021.100999},
      url          = {https://juser.fz-juelich.de/record/904042},
}