SOLPS 5.0 simulations of the high-field side divertor detachment of L-mode plasmas in ASDEX upgrade with convection-dominated radial SOL transport

J. Karhunen; M. Groth; D. P. Coster; D. Carralero; L. Guimarais; V. Nikolaeva; S. Potzel; T. Pütterich; F. Reimold; A. Scarabosio; E. Viezzer; M. Wischmeier; ASDEX Upgrade Team

doi:10.1016/j.nme.2019.02.040

SOLPS 5.0 simulations of the high-field side divertor detachment of L-mode plasmas in ASDEX upgrade with convection-dominated radial SOL transport

J. Karhunen^*, M. Groth, D. P. Coster, D. Carralero, L. Guimarais, V. Nikolaeva, S. Potzel, T. Pütterich, F. Reimold, A. Scarabosio, E. Viezzer, M. Wischmeier, ASDEX Upgrade Team

^*Corresponding author for this work

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Abstract

SOLPS 5.0 simulations assuming convection-dominated radial ion transport show qualitative and quantitative agreement with measurements of detached high-field side (HFS) divertor conditions for unseeded low-power L-mode plasmas in ASDEX Upgrade, while simultaneously maintaining a reasonable match to the density and temperature measurements at the low-field side (LFS) and HFS midplanes within the scatter of the data. The decreased diffusive transport from the high-density region in the HFS divertor volume across the separatrix into the core enables spatial extension of the high-density front to above the X-point in agreement with spectroscopic measurements. The suppressed ion fuelling from this region into the core plasma allows increasing the neutral D ₂ fuelling to experimental levels, leading to agreement with the measured sub-divertor neutral fluxes within 30%. Detachment of the HFS divertor is observed as a significant decrease of the target ion flux and as reproduction of the characteristic roll-over behaviour of the integrated target ion current at increasing upstream density.

Original language	English
Pages (from-to)	279-286
Number of pages	8
Journal	Nuclear Materials and Energy
Volume	19
DOIs	https://doi.org/10.1016/j.nme.2019.02.040
Publication status	Published - 1 May 2019
MoE publication type	A1 Journal article-refereed

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10.1016/j.nme.2019.02.040

1-s2.0-S2352179118301923-mainFinal published version, 1.82 MBLicence: CC BY-NC-ND

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Karhunen, J., Groth, M., Coster, D. P., Carralero, D., Guimarais, L., Nikolaeva, V., Potzel, S., Pütterich, T., Reimold, F., Scarabosio, A., Viezzer, E., Wischmeier, M., & ASDEX Upgrade Team (2019). SOLPS 5.0 simulations of the high-field side divertor detachment of L-mode plasmas in ASDEX upgrade with convection-dominated radial SOL transport. Nuclear Materials and Energy, 19, 279-286. https://doi.org/10.1016/j.nme.2019.02.040

Karhunen, J. ; Groth, M. ; Coster, D. P. ; Carralero, D. ; Guimarais, L. ; Nikolaeva, V. ; Potzel, S. ; Pütterich, T. ; Reimold, F. ; Scarabosio, A. ; Viezzer, E. ; Wischmeier, M. ; ASDEX Upgrade Team. / SOLPS 5.0 simulations of the high-field side divertor detachment of L-mode plasmas in ASDEX upgrade with convection-dominated radial SOL transport. In: Nuclear Materials and Energy. 2019 ; Vol. 19. pp. 279-286.

@article{a6147ac0743443058f6ddf7b6e196fc7,

title = "SOLPS 5.0 simulations of the high-field side divertor detachment of L-mode plasmas in ASDEX upgrade with convection-dominated radial SOL transport",

abstract = " SOLPS 5.0 simulations assuming convection-dominated radial ion transport show qualitative and quantitative agreement with measurements of detached high-field side (HFS) divertor conditions for unseeded low-power L-mode plasmas in ASDEX Upgrade, while simultaneously maintaining a reasonable match to the density and temperature measurements at the low-field side (LFS) and HFS midplanes within the scatter of the data. The decreased diffusive transport from the high-density region in the HFS divertor volume across the separatrix into the core enables spatial extension of the high-density front to above the X-point in agreement with spectroscopic measurements. The suppressed ion fuelling from this region into the core plasma allows increasing the neutral D 2 fuelling to experimental levels, leading to agreement with the measured sub-divertor neutral fluxes within 30%. Detachment of the HFS divertor is observed as a significant decrease of the target ion flux and as reproduction of the characteristic roll-over behaviour of the integrated target ion current at increasing upstream density. ",

author = "J. Karhunen and M. Groth and Coster, {D. P.} and D. Carralero and L. Guimarais and V. Nikolaeva and S. Potzel and T. P{\"u}tterich and F. Reimold and A. Scarabosio and E. Viezzer and M. Wischmeier and {ASDEX Upgrade Team}",

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

year = "2019",

month = may,

day = "1",

doi = "10.1016/j.nme.2019.02.040",

language = "English",

volume = "19",

pages = "279--286",

journal = "Nuclear Materials and Energy",

issn = "2352-1791",

publisher = "Elsevier Science Publishers BV",

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Karhunen, J , Groth, M, Coster, DP, Carralero, D, Guimarais, L, Nikolaeva, V, Potzel, S, Pütterich, T, Reimold, F, Scarabosio, A, Viezzer, E, Wischmeier, M & ASDEX Upgrade Team 2019, 'SOLPS 5.0 simulations of the high-field side divertor detachment of L-mode plasmas in ASDEX upgrade with convection-dominated radial SOL transport', Nuclear Materials and Energy, vol. 19, pp. 279-286. https://doi.org/10.1016/j.nme.2019.02.040

SOLPS 5.0 simulations of the high-field side divertor detachment of L-mode plasmas in ASDEX upgrade with convection-dominated radial SOL transport. / Karhunen, J.; Groth, M.; Coster, D. P.; Carralero, D.; Guimarais, L.; Nikolaeva, V.; Potzel, S.; Pütterich, T.; Reimold, F.; Scarabosio, A.; Viezzer, E.; Wischmeier, M.; ASDEX Upgrade Team.

In: Nuclear Materials and Energy, Vol. 19, 01.05.2019, p. 279-286.

Research output: Contribution to journal › Article › Scientific › peer-review

TY - JOUR

T1 - SOLPS 5.0 simulations of the high-field side divertor detachment of L-mode plasmas in ASDEX upgrade with convection-dominated radial SOL transport

AU - Karhunen, J.

AU - Groth, M.

AU - Coster, D. P.

AU - Carralero, D.

AU - Guimarais, L.

AU - Nikolaeva, V.

AU - Potzel, S.

AU - Pütterich, T.

AU - Reimold, F.

AU - Scarabosio, A.

AU - Viezzer, E.

AU - Wischmeier, M.

AU - ASDEX Upgrade Team

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

PY - 2019/5/1

Y1 - 2019/5/1

N2 - SOLPS 5.0 simulations assuming convection-dominated radial ion transport show qualitative and quantitative agreement with measurements of detached high-field side (HFS) divertor conditions for unseeded low-power L-mode plasmas in ASDEX Upgrade, while simultaneously maintaining a reasonable match to the density and temperature measurements at the low-field side (LFS) and HFS midplanes within the scatter of the data. The decreased diffusive transport from the high-density region in the HFS divertor volume across the separatrix into the core enables spatial extension of the high-density front to above the X-point in agreement with spectroscopic measurements. The suppressed ion fuelling from this region into the core plasma allows increasing the neutral D 2 fuelling to experimental levels, leading to agreement with the measured sub-divertor neutral fluxes within 30%. Detachment of the HFS divertor is observed as a significant decrease of the target ion flux and as reproduction of the characteristic roll-over behaviour of the integrated target ion current at increasing upstream density.

AB - SOLPS 5.0 simulations assuming convection-dominated radial ion transport show qualitative and quantitative agreement with measurements of detached high-field side (HFS) divertor conditions for unseeded low-power L-mode plasmas in ASDEX Upgrade, while simultaneously maintaining a reasonable match to the density and temperature measurements at the low-field side (LFS) and HFS midplanes within the scatter of the data. The decreased diffusive transport from the high-density region in the HFS divertor volume across the separatrix into the core enables spatial extension of the high-density front to above the X-point in agreement with spectroscopic measurements. The suppressed ion fuelling from this region into the core plasma allows increasing the neutral D 2 fuelling to experimental levels, leading to agreement with the measured sub-divertor neutral fluxes within 30%. Detachment of the HFS divertor is observed as a significant decrease of the target ion flux and as reproduction of the characteristic roll-over behaviour of the integrated target ion current at increasing upstream density.

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U2 - 10.1016/j.nme.2019.02.040

DO - 10.1016/j.nme.2019.02.040

M3 - Article

AN - SCOPUS:85062679228

VL - 19

SP - 279

EP - 286

JO - Nuclear Materials and Energy

JF - Nuclear Materials and Energy

SN - 2352-1791

ER -

SOLPS 5.0 simulations of the high-field side divertor detachment of L-mode plasmas in ASDEX upgrade with convection-dominated radial SOL transport

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