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

A. E. Järvinen (Corresponding Author), M. Groth, M. 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, T. MakkonenC. Marchetto, S. Marsen, G. F. Matthews, A. G. Meigs, D. Moulton, M. F. Stamp, S. Wiesen, M. Wischmeier, JET-EFDA collaborators

    Research output: Contribution to journalArticleScientificpeer-review

    19 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/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.

    Original languageEnglish
    Article number48544
    Pages (from-to)135-142
    Number of pages8
    JournalJournal of Nuclear Materials
    Volume463
    DOIs
    Publication statusPublished - 22 Jul 2015
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    inoculation
    Impurities
    Plasmas
    Radiation
    Nitrogen
    impurities
    radiation
    nitrogen
    Deuterium
    Electron temperature
    Radiators
    radiators
    flux (rate)
    detachment
    Ionization
    deuterium
    simulation
    electron energy
    Fluxes
    ionization

    Cite this

    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. ; Makkonen, T. ; Marchetto, C. ; Marsen, S. ; Matthews, G. F. ; Meigs, A. G. ; Moulton, D. ; Stamp, M. F. ; Wiesen, S. ; Wischmeier, M. ; JET-EFDA collaborators. / Interpretation of radiative divertor studies with impurity seeding in type-I ELMy H-mode plasmas in JET-ILW using EDGE2D-EIRENE. In: Journal of Nuclear Materials. 2015 ; Vol. 463. pp. 135-142.
    @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, {A. E.} and M. Groth and M. 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 T. 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 collaborators}",
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    day = "22",
    doi = "10.1016/j.jnucmat.2014.10.047",
    language = "English",
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    pages = "135--142",
    journal = "Journal of Nuclear Materials",
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    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 collaborators 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

    Interpretation of radiative divertor studies with impurity seeding in type-I ELMy H-mode plasmas in JET-ILW using EDGE2D-EIRENE. / Järvinen, A. E. (Corresponding Author); 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, G. F.; Meigs, A. G.; Moulton, D.; Stamp, M. F.; Wiesen, S.; Wischmeier, M.; JET-EFDA collaborators.

    In: Journal of Nuclear Materials, Vol. 463, 48544, 22.07.2015, p. 135-142.

    Research output: Contribution to journalArticleScientificpeer-review

    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, A. E.

    AU - Groth, M.

    AU - Airila, M.

    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, T.

    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 collaborators

    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.

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    U2 - 10.1016/j.jnucmat.2014.10.047

    DO - 10.1016/j.jnucmat.2014.10.047

    M3 - Article

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    EP - 142

    JO - Journal of Nuclear Materials

    JF - Journal of Nuclear Materials

    SN - 0022-3115

    M1 - 48544

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