TY  - CONF
AU  - Horsten, N.
AU  - Groth, M.
AU  - Harting, D.
AU  - Corrigan, G.
AU  - Dekeyser, W.
AU  - Paradela Pérez, I.
AU  - Blommaert, M.
AU  - Wiesen, S.
AU  - Aleiferis, S.
AU  - Marsen, S.
AU  - Borodin, D.
AU  - de la Luna, E.
AU  - Huber, Alexander
AU  - Karhunen, J.
TI  - Benchmark of EDGE2D-EIRENE fluid plasma – kinetic neutral and SOLPS-ITER fluid plasma – fluid/kinetic neutral code suites for JET L-mode plasmas
M1  - FZJ-2021-01649
PY  - 2021
AB  - 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,
T2  - 24th International Conference on Plasma Surface Interactions in Controlled Fusion Devices (PSI 2020)
CY  - 25 Jan 2021 - 29 Jan 2021, virtuell (virtuell)
Y2  - 25 Jan 2021 - 29 Jan 2021
M2  - virtuell, virtuell
LB  - PUB:(DE-HGF)1
UR  - https://juser.fz-juelich.de/record/891663
ER  -