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  • Wiesen, S.Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany. (author)

On the role of finite grid extent in SOLPS-ITER edge plasma simulations for JET H-mode discharges with metallic wall

  • Article/chapterEnglish2018

Publisher, publication year, extent ...

  • ELSEVIER,2018
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-397822
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-397822URI
  • https://doi.org/10.1016/j.nme.2018.10.013DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-241222URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • For complete list of authors see http://dx.doi.org/10.1016/j.nme.2018.10.013
  • QC 20190117
  • The impact of the finite grid size in SOLPS-ITER edge plasma simulations is assessed for JET H-mode discharges with a metal wall. For a semi-horizontal divertor configuration it is shown that the separatrix density is at least 30% higher when a narrow scrape-off layer (SOL) grid width is chosen in SOLPS-ITER compared to the case for which the SOL grid width is maximised. The density increase is caused by kinetic neutrals being not confined inside the divertor region because of the reduced extent of the plasma grid. In this case, an enhanced level of reflections of energetic neutrals at the low-field side (LFS) metal divertor wall is observed. This leads to a shift of the ionisation source further upstream which must be accounted for as a numerical artefact. An overestimate in the cooling at the divertor entrance is observed in this case, identified by a reduced heat flux decay parameters lambda(div)(q). Otherwise and further upstream the mid-plane heat decay length lambda(q) parameter is not affected by any change in divertor dissipation. This confirms the assumptions made for the ITER divertor design studies, i.e. that lambda(q) upstream is essentially set by the assumptions for the ratio radial to parallel heat conductivity. It is also shown that even for attached conditions the decay length relations lambda(ne)>lambda(Te)>lambda(q) hold in the near-SOL upstream. Thus for interpretative edge plasma simulations one must take the (experimental) value of lambda(ne) into account, rather than lambda(q), as the former actually defines the required minimum upstream SOL grid extent.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Andersson Sundén, ErikUppsala universitet,Tillämpad kärnfysik,Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England.(Swepub:uu)erasu959 (author)
  • Binda, Federico,1987-Uppsala universitet,Tillämpad kärnfysik(Swepub:uu)frebi774 (author)
  • Cecconello, MarcoUppsala universitet,Tillämpad kärnfysik(Swepub:uu)marce924 (author)
  • Conroy, SeanUppsala universitet,Tillämpad kärnfysik(Swepub:uu)sco17122 (author)
  • Dzysiuk, NataliiaUppsala universitet,Tillämpad kärnfysik(Swepub:uu)natdz668 (author)
  • Ericsson, GöranUppsala universitet,Tillämpad kärnfysik(Swepub:uu)ger17122 (author)
  • Eriksson, Jacob,Dr,1985-Uppsala universitet,Tillämpad kärnfysik(Swepub:uu)jacer352 (author)
  • Hellesen, Carl,1980-Uppsala universitet,Tillämpad kärnfysik(Swepub:uu)cahel173 (author)
  • Hjalmarsson, AndersUppsala universitet,Tillämpad kärnfysik(Swepub:uu)ahj25356 (author)
  • Possnert, Göran,1951-Uppsala universitet,Tillämpad kärnfysik(Swepub:uu)gpo27116 (author)
  • Sjöstrand, Henrik,1978-Uppsala universitet,Tillämpad kärnfysik(Swepub:uu)hesjo677 (author)
  • Skiba, Mateusz,1985-Uppsala universitet,Tillämpad kärnfysik(Swepub:uu)matsk428 (author)
  • Weiszflog, MatthiasUppsala universitet,Tillämpad kärnfysik(Swepub:uu)mwe25666 (author)
  • Zychor, I. (author)
  • Brezinsek, S.Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany. (author)
  • Bonnin, X.ITER Org, Route Vinon Sur Verdon,CS90 046, F-13067 St Paul Les Durance, France. (author)
  • Delabie, E.Oak Ridge Natl Lab, POB 2009, Oak Ridge, TN 37831 USA. (author)
  • Frassinetti, LorenzoKTH,Fusionsplasmafysik(Swepub:kth)u1sfgalb (author)
  • Groth, M.Aalto Univ, Espoo, Finland. (author)
  • Guillemaut, C.Univ Lisbon, Inst Plasmas & Fusao Nucl, IST, P-1049001 Lisbon, Portugal. (author)
  • Harrison, J.Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England. (author)
  • Harting, D.Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England. (author)
  • Huber, A.Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany. (author)
  • Kruezi, U.ITER Org, Route Vinon Sur Verdon,CS90 046, F-13067 St Paul Les Durance, France. (author)
  • Pitts, R. A.ITER Org, Route Vinon Sur Verdon,CS90 046, F-13067 St Paul Les Durance, France. (author)
  • Wischmeier, M.Max Planck Inst Plasma Phys, D-85748 Garching, Germany. (author)
  • Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany.Tillämpad kärnfysik (creator_code:org_t)

Related titles

  • In:Nuclear Materials and Energy: ELSEVIER17, s. 174-1812352-1791

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