Interpretation of radiative divertor studies with impurity seeding in type-I ELMy H-mode plasmas in JET-ILW using EDGE2D-EIRENE

Aaro E. Järvinen; M. Groth; Markus Airila; P. Belo; M. Beurskens; S. Brezinsek; M. Clever; G. Corrigan; S. Devaux; P. Drewelow; T. Eich; C. Giroud; D. Harting; A. Huber; S. Jachmich; K. Lawson; B. Lipschultz; G. Maddison; C. Maggi; Tapani Makkonen; C. Marchetto; S. Marsen; G. F. Matthews; A. G. Meigs; D. Moulton; M. F. Stamp; S. Wiesen; M. Wischmeier; JET-EFDA contributors

doi:10.1016/j.jnucmat.2014.10.047

Interpretation of radiative divertor studies with impurity seeding in type-I ELMy H-mode plasmas in JET-ILW using EDGE2D-EIRENE

Aaro E. Järvinen^*
, M. Groth
, Markus Airila
, P. Belo
, M. Beurskens
, S. Brezinsek
, M. Clever
, G. Corrigan
, S. Devaux
, P. Drewelow
, T. Eich
, C. Giroud
, D. Harting
, A. Huber
, S. Jachmich
, K. Lawson
, B. Lipschultz
, G. Maddison
, C. Maggi
, Tapani Makkonen

C. Marchetto, S. Marsen, G. F. Matthews, A. G. Meigs, D. Moulton, M. F. Stamp, S. Wiesen, M. Wischmeier, JET-EFDA contributors

^*Corresponding author for this work

Aalto University
Universidade de Lisboa
European Atomic Energy Community (Euratom)
Forschungszentrum Jülich GmbH (FZJ)
Max-Planck-Institut für Plasmaphysik (IPP)
École Royale Militaire
University of York
National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA)

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

27 Citations (Scopus)

Abstract

Abstract Nitrogen seeded JET-ILW H-mode plasmas have been investigated with EDGE2D-EIRENE. The simulations reproduce the experimentally observed factor of 10 reduction in the outer target power deposition when the normalized divertor radiation, Praddiv/P_SOL, increases from the unseeded levels of 15% up to the 50% levels required for detachment. At these radiation levels, nitrogen is predicted dominate the total radiation with a contribution of 85%, consistent with previous measurements in JET-C. Due to the low radiative potential of nitrogen at the electron temperatures above 100 eV, more than 80% of the radiation is predicted to occur in the scrape-off layer, making nitrogen a suitable divertor radiator for typical JET divertor conditions with T_e around 30 eV. The simulations reproduce the experimentally observed particle flux reduction at the low-field side target without the need for strong recombination. This is due to strong impurity radiation reducing the power levels entering the deuterium ionization front.

Original language	English
Article number	48544
Pages (from-to)	135-142
Journal	Journal of Nuclear Materials
Volume	463
DOIs	https://doi.org/10.1016/j.jnucmat.2014.10.047
Publication status	Published - 22 Jul 2015
MoE publication type	A1 Journal article-refereed

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10.1016/j.jnucmat.2014.10.047

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Järvinen, A. E., Groth, M., Airila, M., Belo, P., Beurskens, M., Brezinsek, S., Clever, M., Corrigan, G., Devaux, S., Drewelow, P., Eich, T., Giroud, C., Harting, D., Huber, A., Jachmich, S., Lawson, K., Lipschultz, B., Maddison, G., Maggi, C., ... JET-EFDA contributors (2015). Interpretation of radiative divertor studies with impurity seeding in type-I ELMy H-mode plasmas in JET-ILW using EDGE2D-EIRENE. Journal of Nuclear Materials, 463, 135-142. Article 48544. https://doi.org/10.1016/j.jnucmat.2014.10.047

@article{acff59fff0ed461fb8132a80bce5af2b,

title = "Interpretation of radiative divertor studies with impurity seeding in type-I ELMy H-mode plasmas in JET-ILW using EDGE2D-EIRENE",

abstract = "Abstract Nitrogen seeded JET-ILW H-mode plasmas have been investigated with EDGE2D-EIRENE. The simulations reproduce the experimentally observed factor of 10 reduction in the outer target power deposition when the normalized divertor radiation, Praddiv/PSOL, increases from the unseeded levels of 15\% up to the 50\% levels required for detachment. At these radiation levels, nitrogen is predicted dominate the total radiation with a contribution of 85\%, consistent with previous measurements in JET-C. Due to the low radiative potential of nitrogen at the electron temperatures above 100 eV, more than 80\% of the radiation is predicted to occur in the scrape-off layer, making nitrogen a suitable divertor radiator for typical JET divertor conditions with Te around 30 eV. The simulations reproduce the experimentally observed particle flux reduction at the low-field side target without the need for strong recombination. This is due to strong impurity radiation reducing the power levels entering the deuterium ionization front.",

author = "J{\"a}rvinen, \{Aaro E.\} and M. Groth and Markus Airila and P. Belo and M. Beurskens and S. Brezinsek and M. Clever and G. Corrigan and S. Devaux and P. Drewelow and T. Eich and C. Giroud and D. Harting and A. Huber and S. Jachmich and K. Lawson and B. Lipschultz and G. Maddison and C. Maggi and Tapani Makkonen and C. Marchetto and S. Marsen and Matthews, \{G. F.\} and Meigs, \{A. G.\} and D. Moulton and Stamp, \{M. F.\} and S. Wiesen and M. Wischmeier and \{JET-EFDA contributors\}",

year = "2015",

month = jul,

day = "22",

doi = "10.1016/j.jnucmat.2014.10.047",

language = "English",

volume = "463",

pages = "135--142",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

}

Järvinen, AE, Groth, M, Airila, M, Belo, P, Beurskens, M, Brezinsek, S, Clever, M, Corrigan, G, Devaux, S, Drewelow, P, Eich, T, Giroud, C, Harting, D, Huber, A, Jachmich, S, Lawson, K, Lipschultz, B, Maddison, G, Maggi, C, Makkonen, T, Marchetto, C, Marsen, S, Matthews, GF, Meigs, AG, Moulton, D, Stamp, MF, Wiesen, S, Wischmeier, M & JET-EFDA contributors 2015, 'Interpretation of radiative divertor studies with impurity seeding in type-I ELMy H-mode plasmas in JET-ILW using EDGE2D-EIRENE', Journal of Nuclear Materials, vol. 463, 48544, pp. 135-142. https://doi.org/10.1016/j.jnucmat.2014.10.047

TY - JOUR

T1 - Interpretation of radiative divertor studies with impurity seeding in type-I ELMy H-mode plasmas in JET-ILW using EDGE2D-EIRENE

AU - Järvinen, Aaro E.

AU - Groth, M.

AU - Airila, Markus

AU - Belo, P.

AU - Beurskens, M.

AU - Brezinsek, S.

AU - Clever, M.

AU - Corrigan, G.

AU - Devaux, S.

AU - Drewelow, P.

AU - Eich, T.

AU - Giroud, C.

AU - Harting, D.

AU - Huber, A.

AU - Jachmich, S.

AU - Lawson, K.

AU - Lipschultz, B.

AU - Maddison, G.

AU - Maggi, C.

AU - Makkonen, Tapani

AU - Marchetto, C.

AU - Marsen, S.

AU - Matthews, G. F.

AU - Meigs, A. G.

AU - Moulton, D.

AU - Stamp, M. F.

AU - Wiesen, S.

AU - Wischmeier, M.

AU - JET-EFDA contributors

PY - 2015/7/22

Y1 - 2015/7/22

N2 - Abstract Nitrogen seeded JET-ILW H-mode plasmas have been investigated with EDGE2D-EIRENE. The simulations reproduce the experimentally observed factor of 10 reduction in the outer target power deposition when the normalized divertor radiation, Praddiv/PSOL, increases from the unseeded levels of 15% up to the 50% levels required for detachment. At these radiation levels, nitrogen is predicted dominate the total radiation with a contribution of 85%, consistent with previous measurements in JET-C. Due to the low radiative potential of nitrogen at the electron temperatures above 100 eV, more than 80% of the radiation is predicted to occur in the scrape-off layer, making nitrogen a suitable divertor radiator for typical JET divertor conditions with Te around 30 eV. The simulations reproduce the experimentally observed particle flux reduction at the low-field side target without the need for strong recombination. This is due to strong impurity radiation reducing the power levels entering the deuterium ionization front.

AB - Abstract Nitrogen seeded JET-ILW H-mode plasmas have been investigated with EDGE2D-EIRENE. The simulations reproduce the experimentally observed factor of 10 reduction in the outer target power deposition when the normalized divertor radiation, Praddiv/PSOL, increases from the unseeded levels of 15% up to the 50% levels required for detachment. At these radiation levels, nitrogen is predicted dominate the total radiation with a contribution of 85%, consistent with previous measurements in JET-C. Due to the low radiative potential of nitrogen at the electron temperatures above 100 eV, more than 80% of the radiation is predicted to occur in the scrape-off layer, making nitrogen a suitable divertor radiator for typical JET divertor conditions with Te around 30 eV. The simulations reproduce the experimentally observed particle flux reduction at the low-field side target without the need for strong recombination. This is due to strong impurity radiation reducing the power levels entering the deuterium ionization front.

UR - https://www.scopus.com/pages/publications/84937677823

U2 - 10.1016/j.jnucmat.2014.10.047

DO - 10.1016/j.jnucmat.2014.10.047

M3 - Article

AN - SCOPUS:84937677823

SN - 0022-3115

VL - 463

SP - 135

EP - 142

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 48544

ER -

Interpretation of radiative divertor studies with impurity seeding in type-I ELMy H-mode plasmas in JET-ILW using EDGE2D-EIRENE

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