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@INPROCEEDINGS{Horsten:891663,
      author       = {Horsten, N. and Groth, M. and Harting, D. and Corrigan, G.
                      and Dekeyser, W. and Paradela Pérez, I. and Blommaert, M.
                      and Wiesen, S. and Aleiferis, S. and Marsen, S. and Borodin,
                      D. and de la Luna, E. and Huber, Alexander and Karhunen, J.},
      title        = {{B}enchmark of {EDGE}2{D}-{EIRENE} fluid plasma – kinetic
                      neutral and {SOLPS}-{ITER} fluid plasma – fluid/kinetic
                      neutral code suites for {JET} {L}-mode plasmas},
      reportid     = {FZJ-2021-01649},
      year         = {2021},
      abstract     = {Benchmark of EDGE2D-EIRENE fluid plasma–kinetic neutral
                      and SOLPS-ITER fluid plasma –fluid/kinetic neutral
                      codesuitesfor JETL-mode plasmasN. Horstena,b, M.Grotha, D.
                      Hartingb, G. Corriganb, W. Dekeyserc, I.
                      ParadelaPéreza,d,M. Blommaertc,S. Wiesene,S. Aleiferisf,b,
                      S. Marseng,D. Borodine,E.de la Lunah,b, A.Hubere,b,J.
                      Karhunena,b, andJET Contributors*aAalto
                      University,Departmentof Applied Physics,Espoo, FinlandbCCFE,
                      Culham Science Centre, Abingdon,United KingdomcKULeuven,
                      Department of Mechanical Engineering, Leuven,
                      BelgiumdMax-Planck-Institut für Plasmaphysik,
                      Garching,GermanyeForschungszentrum Jülich,Institut für
                      Energie-und Klimaforschung,Jülich,Germanyf NationalCentre
                      for Scientific Research “Demokritos”, Fusion Technology
                      Group, Athens, GreecegMax-Planck-Institut für Plasmaphysik,
                      Greifswald,Germany,hLaboratorioNacional de Fusión, Madrid,
                      Spainniels.horsten@aalto.fiFor aJET-ITER like
                      wallL-modelow-recycling plasmafrom Ref. [1],
                      $SOLPS-ITERpredictsa10\%$ higher particle flux and a $30\%$
                      higher total energyfluxtothedivertor targetscompared to
                      EDGE2D-EIRENE for nearly identical inputparameter settings.
                      In this contribution,we describe the causes for these
                      discrepanciesin low-recycling, high-recycling and detached
                      divertor conditions.The simulationsare validated against
                      Langmuir probe data at the divertor targetsfor an electron
                      density scan at outer midplane separatrix.In addition, we
                      explorethe performance ofthe spatially hybrid fluid-kinetic
                      approachin SOLPS-ITER, where a deterministicfluid modelfor
                      the deuteriumatoms in the plasma grid region is coupled to a
                      kinetic Monte Carlo model in the vacuum regionsnear the main
                      chamber wall and in the far private flux region. Prior work
                      has proventhe accuracy of a fluid neutral
                      approximationforion-atom charge-exchange dominated cases[2]
                      and theCPU time reduction potentialwith at leasta factor
                      fourby using a spatially hybrid model [3].In contrast to
                      Ref. [3], in whichonly a simplified rectangular slab casewas
                      considered,without explicit treatment of the molecules, we
                      apply the hybrid model for thedeuterium atomsin arealistic
                      JET geometry. Firstly, the non-orthogonality of the
                      numerical grid in combination with the isotropic character
                      of the neutral particles requires the use of a 9-point
                      stencil [4]. Secondly, the assumption of dominant neutral
                      flow parallel to the magnetic field due to ample ion-atom
                      charge-exchange collisions is verified in the presence of
                      electromagnetic drifts.Finally, thehybrid model forthe atoms
                      is coupled to a full kinetic model for the molecules.[1] M.
                      Groth,et al., Nuclear Fusion 53 (2013) 093016[2] N. Horsten,
                      et al., Nuclear Fusion57(2017) 116043[3] M. Blommaert, et
                      al.,Nuclear Materials and Energy 19 (2019) 28-33[4] W.
                      Dekeyser, et al.,NuclearMaterials and Energy 18 (2019)
                      125-130*See the author list of E. Joffrin et al., accepted
                      for publication in Nuclear Fusion Special issue 2019,},
      month         = {Jan},
      date          = {2021-01-25},
      organization  = {24th International Conference on
                       Plasma Surface Interactions in
                       Controlled Fusion Devices (PSI 2020),
                       virtuell (virtuell), 25 Jan 2021 - 29
                       Jan 2021},
      cin          = {IEK-1 / IBI-1},
      cid          = {I:(DE-Juel1)IEK-1-20101013 / I:(DE-Juel1)IBI-1-20200312},
      pnm          = {134 - Plasma-Wand-Wechselwirkung (POF4-134)},
      pid          = {G:(DE-HGF)POF4-134},
      typ          = {PUB:(DE-HGF)1},
      url          = {https://juser.fz-juelich.de/record/891663},
}