Comparison of DIVIMP and EDGE2D-EIRENE tungsten transport predictions in JET edge plasmas

H. A. Kumpulainen; M. Groth; M. Fontell; A. E. Jaervinen; G. Corrigan; D. Harting

doi:10.1016/j.nme.2020.100784

Comparison of DIVIMP and EDGE2D-EIRENE tungsten transport predictions in JET edge plasmas

H. A. Kumpulainen^*, M. Groth, M. Fontell, A. E. Jaervinen, G. Corrigan, D. Harting

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The average tungsten concentrations in the pedestal region (c_W) predicted by the Monte Carlo code DIVIMP and the coupled multi-fluid plasma/kinetic neutral code EDGE2D-EIRENE are found to agree within a factor of 2 for a range of JET-ILW L-mode and H-mode plasma conditions. Under attached divertor conditions with c_W exceeding 10⁻⁶, the c_W predicted by DIVIMP is consistently ~50% higher than by EDGE2D-EIRENE. In colder plasma scenarios with c_W <10^-6, stochastic variations exceed the systematic disagreement between the two codes. The average tungsten charge predicted by EDGE2D-EIRENE in the upstream scrape-off layer is lower by 40–50% due to the bundling of the 74 tungsten ion charge states into 6 fluid species, which explains the reduced tungsten accumulation in the main plasma compared to the DIVIMP predictions.

Alkuperäiskieli	Englanti
Artikkeli	100784
Sivumäärä	7
Julkaisu	Nuclear Materials and Energy
Vuosikerta	25
DOI - pysyväislinkit	https://doi.org/10.1016/j.nme.2020.100784
Tila	Julkaistu - jouluk. 2020
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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10.1016/j.nme.2020.100784

Kumpulainen_Comparison.1-s2.0-S2352179120300600-mainFinal published version, 2,91 MBLisenssi: CC BY-NC-ND

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@article{fd00bf895481414aaec2868f6caf5928,

title = "Comparison of DIVIMP and EDGE2D-EIRENE tungsten transport predictions in JET edge plasmas",

abstract = "The average tungsten concentrations in the pedestal region (cW) predicted by the Monte Carlo code DIVIMP and the coupled multi-fluid plasma/kinetic neutral code EDGE2D-EIRENE are found to agree within a factor of 2 for a range of JET-ILW L-mode and H-mode plasma conditions. Under attached divertor conditions with cW exceeding 10−6, the cW predicted by DIVIMP is consistently ~50% higher than by EDGE2D-EIRENE. In colder plasma scenarios with cW <10-6, stochastic variations exceed the systematic disagreement between the two codes. The average tungsten charge predicted by EDGE2D-EIRENE in the upstream scrape-off layer is lower by 40–50% due to the bundling of the 74 tungsten ion charge states into 6 fluid species, which explains the reduced tungsten accumulation in the main plasma compared to the DIVIMP predictions.",

keywords = "Code validation, Impurity transport, Joint European Torus, Monte Carlo simulation, Scrape-off layer, Tungsten",

author = "Kumpulainen, {H. A.} and M. Groth and M. Fontell and Jaervinen, {A. E.} and G. Corrigan and D. Harting",

note = "| openaire: EC/H2020/633053/EU//EUROfusion ",

year = "2020",

month = dec,

doi = "10.1016/j.nme.2020.100784",

language = "English",

volume = "25",

journal = "Nuclear Materials and Energy",

issn = "2352-1791",

publisher = "Elsevier Science",

}

TY - JOUR

T1 - Comparison of DIVIMP and EDGE2D-EIRENE tungsten transport predictions in JET edge plasmas

AU - Kumpulainen, H. A.

AU - Groth, M.

AU - Fontell, M.

AU - Jaervinen, A. E.

AU - Corrigan, G.

AU - Harting, D.

N1 - | openaire: EC/H2020/633053/EU//EUROfusion

PY - 2020/12

Y1 - 2020/12

N2 - The average tungsten concentrations in the pedestal region (cW) predicted by the Monte Carlo code DIVIMP and the coupled multi-fluid plasma/kinetic neutral code EDGE2D-EIRENE are found to agree within a factor of 2 for a range of JET-ILW L-mode and H-mode plasma conditions. Under attached divertor conditions with cW exceeding 10−6, the cW predicted by DIVIMP is consistently ~50% higher than by EDGE2D-EIRENE. In colder plasma scenarios with cW <10-6, stochastic variations exceed the systematic disagreement between the two codes. The average tungsten charge predicted by EDGE2D-EIRENE in the upstream scrape-off layer is lower by 40–50% due to the bundling of the 74 tungsten ion charge states into 6 fluid species, which explains the reduced tungsten accumulation in the main plasma compared to the DIVIMP predictions.

AB - The average tungsten concentrations in the pedestal region (cW) predicted by the Monte Carlo code DIVIMP and the coupled multi-fluid plasma/kinetic neutral code EDGE2D-EIRENE are found to agree within a factor of 2 for a range of JET-ILW L-mode and H-mode plasma conditions. Under attached divertor conditions with cW exceeding 10−6, the cW predicted by DIVIMP is consistently ~50% higher than by EDGE2D-EIRENE. In colder plasma scenarios with cW <10-6, stochastic variations exceed the systematic disagreement between the two codes. The average tungsten charge predicted by EDGE2D-EIRENE in the upstream scrape-off layer is lower by 40–50% due to the bundling of the 74 tungsten ion charge states into 6 fluid species, which explains the reduced tungsten accumulation in the main plasma compared to the DIVIMP predictions.

KW - Code validation

KW - Impurity transport

KW - Joint European Torus

KW - Monte Carlo simulation

KW - Scrape-off layer

KW - Tungsten

UR - http://www.scopus.com/inward/record.url?scp=85089416973&partnerID=8YFLogxK

U2 - 10.1016/j.nme.2020.100784

DO - 10.1016/j.nme.2020.100784

M3 - Article

AN - SCOPUS:85089416973

SN - 2352-1791

VL - 25

JO - Nuclear Materials and Energy

JF - Nuclear Materials and Energy

M1 - 100784

ER -

Comparison of DIVIMP and EDGE2D-EIRENE tungsten transport predictions in JET edge plasmas

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