ERO modelling of local deposition of injected 13C tracer at the outer divertor of JET

Markus, I. Airila, L.K. Aho-Mantila, S. Brezinsek, J.P. Coad, A. Kirschner, Jari Likonen, D. Matveev, M. Rubel, J.D. Strachan, A. Widdowson, S. Wiesen, JET EFDA Contributors

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    8 Citations (Scopus)

    Abstract

    The 2004 tracer experiment of JET with the injection of 13CH4 into H-mode plasma at the outer divertor has been modelled with the Monte Carlo impurity transport code ERO. EDGE2D solutions for inter-ELM and ELM-peak phases were used as plasma backgrounds. Local two-dimensional (2D) deposition patterns at the vertical outer divertor target plate were obtained for comparison with post-mortem surface analyses. ERO also provides emission profiles for comparison with radially resolved spectroscopic measurements. Modelling indicates that enhanced re-erosion of deposited carbon layers is essential in explaining the amount of local deposition. Assuming negligible effective sticking of hydrocarbons, the measured local deposition of 20–34% is reproduced if re-erosion of deposits is enhanced by a factor of 2.5–7 compared to graphite erosion. If deposits are treated like the substrate, the modelled deposition is 55%. Deposition measurements at the shadowed area around injectors can be well explained by assuming negligible re-erosion but similar sticking behaviour there as on plasma-wetted surfaces.
    Original languageEnglish
    Article number014021
    JournalPhysica Scripta
    Issue numberT138
    DOIs
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed

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    tracers
    Erosion
    erosion
    Modeling
    Plasma
    deposits
    Injector
    Graphite
    Hydrocarbons
    Impurities
    injectors
    Injection
    Carbon
    graphite
    hydrocarbons
    Vertical
    Substrate
    injection
    impurities
    Target

    Cite this

    Airila, Markus, I. ; Aho-Mantila, L.K. ; Brezinsek, S. ; Coad, J.P. ; Kirschner, A. ; Likonen, Jari ; Matveev, D. ; Rubel, M. ; Strachan, J.D. ; Widdowson, A. ; Wiesen, S. ; Contributors, JET EFDA. / ERO modelling of local deposition of injected 13C tracer at the outer divertor of JET. In: Physica Scripta. 2009 ; No. T138.
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    title = "ERO modelling of local deposition of injected 13C tracer at the outer divertor of JET",
    abstract = "The 2004 tracer experiment of JET with the injection of 13CH4 into H-mode plasma at the outer divertor has been modelled with the Monte Carlo impurity transport code ERO. EDGE2D solutions for inter-ELM and ELM-peak phases were used as plasma backgrounds. Local two-dimensional (2D) deposition patterns at the vertical outer divertor target plate were obtained for comparison with post-mortem surface analyses. ERO also provides emission profiles for comparison with radially resolved spectroscopic measurements. Modelling indicates that enhanced re-erosion of deposited carbon layers is essential in explaining the amount of local deposition. Assuming negligible effective sticking of hydrocarbons, the measured local deposition of 20–34{\%} is reproduced if re-erosion of deposits is enhanced by a factor of 2.5–7 compared to graphite erosion. If deposits are treated like the substrate, the modelled deposition is 55{\%}. Deposition measurements at the shadowed area around injectors can be well explained by assuming negligible re-erosion but similar sticking behaviour there as on plasma-wetted surfaces.",
    author = "Airila, {Markus, I.} and L.K. Aho-Mantila and S. Brezinsek and J.P. Coad and A. Kirschner and Jari Likonen and D. Matveev and M. Rubel and J.D. Strachan and A. Widdowson and S. Wiesen and Contributors, {JET EFDA}",
    year = "2009",
    doi = "10.1088/0031-8949/2009/T138/014021",
    language = "English",
    journal = "Physica Scripta",
    issn = "0031-8949",
    publisher = "Institute of Physics IOP",
    number = "T138",

    }

    Airila, MI, Aho-Mantila, LK, Brezinsek, S, Coad, JP, Kirschner, A, Likonen, J, Matveev, D, Rubel, M, Strachan, JD, Widdowson, A, Wiesen, S & Contributors, JETEFDA 2009, 'ERO modelling of local deposition of injected 13C tracer at the outer divertor of JET', Physica Scripta, no. T138, 014021. https://doi.org/10.1088/0031-8949/2009/T138/014021

    ERO modelling of local deposition of injected 13C tracer at the outer divertor of JET. / Airila, Markus, I.; Aho-Mantila, L.K.; Brezinsek, S.; Coad, J.P.; Kirschner, A.; Likonen, Jari; Matveev, D.; Rubel, M.; Strachan, J.D.; Widdowson, A.; Wiesen, S.; Contributors, JET EFDA.

    In: Physica Scripta, No. T138, 014021, 2009.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - ERO modelling of local deposition of injected 13C tracer at the outer divertor of JET

    AU - Airila, Markus, I.

    AU - Aho-Mantila, L.K.

    AU - Brezinsek, S.

    AU - Coad, J.P.

    AU - Kirschner, A.

    AU - Likonen, Jari

    AU - Matveev, D.

    AU - Rubel, M.

    AU - Strachan, J.D.

    AU - Widdowson, A.

    AU - Wiesen, S.

    AU - Contributors, JET EFDA

    PY - 2009

    Y1 - 2009

    N2 - The 2004 tracer experiment of JET with the injection of 13CH4 into H-mode plasma at the outer divertor has been modelled with the Monte Carlo impurity transport code ERO. EDGE2D solutions for inter-ELM and ELM-peak phases were used as plasma backgrounds. Local two-dimensional (2D) deposition patterns at the vertical outer divertor target plate were obtained for comparison with post-mortem surface analyses. ERO also provides emission profiles for comparison with radially resolved spectroscopic measurements. Modelling indicates that enhanced re-erosion of deposited carbon layers is essential in explaining the amount of local deposition. Assuming negligible effective sticking of hydrocarbons, the measured local deposition of 20–34% is reproduced if re-erosion of deposits is enhanced by a factor of 2.5–7 compared to graphite erosion. If deposits are treated like the substrate, the modelled deposition is 55%. Deposition measurements at the shadowed area around injectors can be well explained by assuming negligible re-erosion but similar sticking behaviour there as on plasma-wetted surfaces.

    AB - The 2004 tracer experiment of JET with the injection of 13CH4 into H-mode plasma at the outer divertor has been modelled with the Monte Carlo impurity transport code ERO. EDGE2D solutions for inter-ELM and ELM-peak phases were used as plasma backgrounds. Local two-dimensional (2D) deposition patterns at the vertical outer divertor target plate were obtained for comparison with post-mortem surface analyses. ERO also provides emission profiles for comparison with radially resolved spectroscopic measurements. Modelling indicates that enhanced re-erosion of deposited carbon layers is essential in explaining the amount of local deposition. Assuming negligible effective sticking of hydrocarbons, the measured local deposition of 20–34% is reproduced if re-erosion of deposits is enhanced by a factor of 2.5–7 compared to graphite erosion. If deposits are treated like the substrate, the modelled deposition is 55%. Deposition measurements at the shadowed area around injectors can be well explained by assuming negligible re-erosion but similar sticking behaviour there as on plasma-wetted surfaces.

    U2 - 10.1088/0031-8949/2009/T138/014021

    DO - 10.1088/0031-8949/2009/T138/014021

    M3 - Article

    JO - Physica Scripta

    JF - Physica Scripta

    SN - 0031-8949

    IS - T138

    M1 - 014021

    ER -