Modelling of carbon migration during JET 13C injection experiments

J. D. Strachan, Jari Likonen, P. Coad, M. Rubel, A. Widdowson, M. Airila, P. Andrew, S. Brezinsek, G. Corrigan, H. G. Esser, S. Jachmich, A. Kallenbach, A. Kirschner, A. Kreter, G. F. Matthews, V. Philipps, R. A. Pitts, J. Spence, M. Stamp, S. WiesenJET-EFDA Contributors

    Research output: Contribution to journalArticleScientificpeer-review

    26 Citations (Scopus)

    Abstract

    JET has performed two dedicated carbon migration experiments on the final run day of separate campaigns (2001 and 2004) using 13CH4 methane injected into repeated discharges. The EDGE2D/NIMBUS code modelled the carbon migration in both experiments. This paper describes this modelling and identifies a number of important migration pathways: (1) deposition and erosion near the injection location, (2) migration through the main chamber SOL, (3) migration through the private flux region (PFR) aided by E × B drifts and (4) neutral migration originating near the strike points. In H-Mode, type I ELMs are calculated to influence the migration by enhancing erosion during the ELM peak and increasing the long-range migration immediately following the ELM. The erosion/re-deposition cycle along the outer target leads to a multistep migration of 13C towards the separatrix which is called 'walking'. This walking created carbon neutrals at the outer strike point and led to 13C deposition in the PFR. Although several migration pathways have been identified, quantitative analyses are hindered by experimental uncertainty in divertor leakage, and the lack of measurements at locations such as gaps and shadowed regions.
    Original languageEnglish
    Article number105002
    JournalNuclear Fusion
    Volume48
    Issue number10
    DOIs
    Publication statusPublished - 2008
    MoE publication typeA1 Journal article-refereed

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    Cite this

    Strachan, J. D., Likonen, J., Coad, P., Rubel, M., Widdowson, A., Airila, M., ... JET-EFDA Contributors (2008). Modelling of carbon migration during JET 13C injection experiments. Nuclear Fusion, 48(10), [105002]. https://doi.org/10.1088/0029-5515/48/10/105002
    Strachan, J. D. ; Likonen, Jari ; Coad, P. ; Rubel, M. ; Widdowson, A. ; Airila, M. ; Andrew, P. ; Brezinsek, S. ; Corrigan, G. ; Esser, H. G. ; Jachmich, S. ; Kallenbach, A. ; Kirschner, A. ; Kreter, A. ; Matthews, G. F. ; Philipps, V. ; Pitts, R. A. ; Spence, J. ; Stamp, M. ; Wiesen, S. ; JET-EFDA Contributors. / Modelling of carbon migration during JET 13C injection experiments. In: Nuclear Fusion. 2008 ; Vol. 48, No. 10.
    @article{62ff6c7cb3da43f99652d9200b4725c8,
    title = "Modelling of carbon migration during JET 13C injection experiments",
    abstract = "JET has performed two dedicated carbon migration experiments on the final run day of separate campaigns (2001 and 2004) using 13CH4 methane injected into repeated discharges. The EDGE2D/NIMBUS code modelled the carbon migration in both experiments. This paper describes this modelling and identifies a number of important migration pathways: (1) deposition and erosion near the injection location, (2) migration through the main chamber SOL, (3) migration through the private flux region (PFR) aided by E × B drifts and (4) neutral migration originating near the strike points. In H-Mode, type I ELMs are calculated to influence the migration by enhancing erosion during the ELM peak and increasing the long-range migration immediately following the ELM. The erosion/re-deposition cycle along the outer target leads to a multistep migration of 13C towards the separatrix which is called 'walking'. This walking created carbon neutrals at the outer strike point and led to 13C deposition in the PFR. Although several migration pathways have been identified, quantitative analyses are hindered by experimental uncertainty in divertor leakage, and the lack of measurements at locations such as gaps and shadowed regions.",
    author = "Strachan, {J. D.} and Jari Likonen and P. Coad and M. Rubel and A. Widdowson and M. Airila and P. Andrew and S. Brezinsek and G. Corrigan and Esser, {H. G.} and S. Jachmich and A. Kallenbach and A. Kirschner and A. Kreter and Matthews, {G. F.} and V. Philipps and Pitts, {R. A.} and J. Spence and M. Stamp and S. Wiesen and {JET-EFDA Contributors}",
    year = "2008",
    doi = "10.1088/0029-5515/48/10/105002",
    language = "English",
    volume = "48",
    journal = "Nuclear Fusion",
    issn = "0029-5515",
    publisher = "Institute of Physics IOP",
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    Strachan, JD, Likonen, J, Coad, P, Rubel, M, Widdowson, A, Airila, M, Andrew, P, Brezinsek, S, Corrigan, G, Esser, HG, Jachmich, S, Kallenbach, A, Kirschner, A, Kreter, A, Matthews, GF, Philipps, V, Pitts, RA, Spence, J, Stamp, M, Wiesen, S & JET-EFDA Contributors 2008, 'Modelling of carbon migration during JET 13C injection experiments', Nuclear Fusion, vol. 48, no. 10, 105002. https://doi.org/10.1088/0029-5515/48/10/105002

    Modelling of carbon migration during JET 13C injection experiments. / Strachan, J. D.; Likonen, Jari; Coad, P.; Rubel, M.; Widdowson, A.; Airila, M.; Andrew, P.; Brezinsek, S.; Corrigan, G.; Esser, H. G.; Jachmich, S.; Kallenbach, A.; Kirschner, A.; Kreter, A.; Matthews, G. F.; Philipps, V.; Pitts, R. A.; Spence, J.; Stamp, M.; Wiesen, S.; JET-EFDA Contributors.

    In: Nuclear Fusion, Vol. 48, No. 10, 105002, 2008.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Modelling of carbon migration during JET 13C injection experiments

    AU - Strachan, J. D.

    AU - Likonen, Jari

    AU - Coad, P.

    AU - Rubel, M.

    AU - Widdowson, A.

    AU - Airila, M.

    AU - Andrew, P.

    AU - Brezinsek, S.

    AU - Corrigan, G.

    AU - Esser, H. G.

    AU - Jachmich, S.

    AU - Kallenbach, A.

    AU - Kirschner, A.

    AU - Kreter, A.

    AU - Matthews, G. F.

    AU - Philipps, V.

    AU - Pitts, R. A.

    AU - Spence, J.

    AU - Stamp, M.

    AU - Wiesen, S.

    AU - JET-EFDA Contributors,

    PY - 2008

    Y1 - 2008

    N2 - JET has performed two dedicated carbon migration experiments on the final run day of separate campaigns (2001 and 2004) using 13CH4 methane injected into repeated discharges. The EDGE2D/NIMBUS code modelled the carbon migration in both experiments. This paper describes this modelling and identifies a number of important migration pathways: (1) deposition and erosion near the injection location, (2) migration through the main chamber SOL, (3) migration through the private flux region (PFR) aided by E × B drifts and (4) neutral migration originating near the strike points. In H-Mode, type I ELMs are calculated to influence the migration by enhancing erosion during the ELM peak and increasing the long-range migration immediately following the ELM. The erosion/re-deposition cycle along the outer target leads to a multistep migration of 13C towards the separatrix which is called 'walking'. This walking created carbon neutrals at the outer strike point and led to 13C deposition in the PFR. Although several migration pathways have been identified, quantitative analyses are hindered by experimental uncertainty in divertor leakage, and the lack of measurements at locations such as gaps and shadowed regions.

    AB - JET has performed two dedicated carbon migration experiments on the final run day of separate campaigns (2001 and 2004) using 13CH4 methane injected into repeated discharges. The EDGE2D/NIMBUS code modelled the carbon migration in both experiments. This paper describes this modelling and identifies a number of important migration pathways: (1) deposition and erosion near the injection location, (2) migration through the main chamber SOL, (3) migration through the private flux region (PFR) aided by E × B drifts and (4) neutral migration originating near the strike points. In H-Mode, type I ELMs are calculated to influence the migration by enhancing erosion during the ELM peak and increasing the long-range migration immediately following the ELM. The erosion/re-deposition cycle along the outer target leads to a multistep migration of 13C towards the separatrix which is called 'walking'. This walking created carbon neutrals at the outer strike point and led to 13C deposition in the PFR. Although several migration pathways have been identified, quantitative analyses are hindered by experimental uncertainty in divertor leakage, and the lack of measurements at locations such as gaps and shadowed regions.

    U2 - 10.1088/0029-5515/48/10/105002

    DO - 10.1088/0029-5515/48/10/105002

    M3 - Article

    VL - 48

    JO - Nuclear Fusion

    JF - Nuclear Fusion

    SN - 0029-5515

    IS - 10

    M1 - 105002

    ER -