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@ARTICLE{Holm:904050,
      author       = {Holm, A. and Börner, P. and Rognlien, T. D. and Meyer, W.
                      H and Groth, M.},
      title        = {{C}omparison of a collisional-radiative fluid model of {H}2
                      in {UEDGE} to the kinetic neutral code {EIRENE}},
      journal      = {Nuclear materials and energy},
      volume       = {27},
      issn         = {2352-1791},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2021-05620},
      pages        = {100982 -},
      year         = {2021},
      abstract     = {A fluid collisional-radiative model for H2 has been
                      implemented in the edge-fluid code UEDGE and compared to the
                      kinetic neutral code EIRENE on a simple, 2D, orthogonal
                      domain with a constant, static plasma distribution. The
                      novel CRUMPET Python tool was used to implement dissociation
                      and energy rate coefficients that consider
                      molecular-assisted processes, binding energy, and radiation
                      due to molecular processes into the UEDGE fluid molecular
                      model. The agreement between the fluid and kinetic molecular
                      models was found to be within $20\%$ when corresponding
                      rates were used in UEDGE and EIRENE for a domain with
                      absorbing boundaries. When wall recycling was considered,
                      EIRENE predicted up to a factor of 2.2 higher molecular
                      densities than UEDGE at T < 5 eV. The difference is due to
                      the absence of radial gradients driving diffusive wall
                      fluxes and, thus, recycling in UEDGE and molecular
                      self-scattering in EIRENE, and is likely dependent on plasma
                      profiles and domain geometry. Comparison of the molecular
                      energy sources in EIRENE and UEDGE suggest the constant
                      elastic scattering rate coefficient used in UEDGE needs to
                      be updated to a temperature-dependent coefficient and that
                      atom-molecule equipartition should be considered in the
                      EIRENE model for background plasma density in excess of .
                      Finally, collisional-radiative CRUMPET simulations indicate
                      that the vibrational molecular populations become comparable
                      to the ground-state molecular population when the plasma
                      temperature decrease below 6 eV and, thus, require
                      time-dependent evaluation.},
      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:000663767800001},
      doi          = {10.1016/j.nme.2021.100982},
      url          = {https://juser.fz-juelich.de/record/904050},
}