Modeling the 2007 JET 13C migration experiments

J.D. Strachan, Jari Likonen, Antti Hakola, J.P. Coad, A. Widdowson, Seppo Koivuranta, D.E. Hole, M. Rubel, JET-EFDA collaborators

    Research output: Contribution to journalArticleScientificpeer-review

    Abstract

    Using the last run day of the 2007 JET experimental campaign, $^{13>CH$_{4> was introduced repeatedly from the vessel top into a single plasma type (H-mode, I$_{p>= 1.6 MA, B$_{t>= 1.6 T). Similar experiments were performed in 2001 (vessel top into L-Mode) and 2004 (outer divertor into H-Mode). Divertor and wall tiles were removed and been analysed using secondary ion mass spectrometry (SIMS) and Rutherford backscattering (RBS) to determine the $^{13>C migration. $^{13>C was observed to migrate both to the inner (largest deposit), outer divertor (less), and the floor tiles (least). This paper reports the EDGE2D/NIMBUS based modelling of the carbon migration. The emphasis is on the comparison of the 2007 results with the 2001 results where both injections were from the machine top but ELMs were present in 2007 but not present in 2001. The ELMs seemed to cause more $^{13>C re-erosion near the inner strike point. Also of interest is the difference in the Private Flux Region deposits where the changes in divertor geometry between 2004 and 2007 caused differences in the deposits. In 2007, the tilting of the load bearing tile caused regions of the PFR to be shadowed from the inner strike point which were not shadowed in 2004, indicating $^{13>C neutrals originated from the OSP.
    Original languageEnglish
    Article numberPP9.00139
    JournalBulletin of the American Physical Society
    Volume55
    Issue number15
    Publication statusPublished - 2010
    MoE publication typeA1 Journal article-refereed
    Event52nd Annual Meeting of the APS Division of Plasma Physics - Chicago, United States
    Duration: 8 Nov 201012 Nov 2010

    Fingerprint

    vessel
    modeling
    mass spectrometry
    experiment
    erosion
    plasma
    geometry
    ion
    carbon
    comparison

    Keywords

    • plasma physics
    • fusion energy

    Cite this

    Strachan, J. D., Likonen, J., Hakola, A., Coad, J. P., Widdowson, A., Koivuranta, S., ... JET-EFDA collaborators (2010). Modeling the 2007 JET 13C migration experiments. Bulletin of the American Physical Society, 55(15), [PP9.00139].
    Strachan, J.D. ; Likonen, Jari ; Hakola, Antti ; Coad, J.P. ; Widdowson, A. ; Koivuranta, Seppo ; Hole, D.E. ; Rubel, M. ; JET-EFDA collaborators. / Modeling the 2007 JET 13C migration experiments. In: Bulletin of the American Physical Society. 2010 ; Vol. 55, No. 15.
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    abstract = "Using the last run day of the 2007 JET experimental campaign, $^{13>CH$_{4> was introduced repeatedly from the vessel top into a single plasma type (H-mode, I$_{p>= 1.6 MA, B$_{t>= 1.6 T). Similar experiments were performed in 2001 (vessel top into L-Mode) and 2004 (outer divertor into H-Mode). Divertor and wall tiles were removed and been analysed using secondary ion mass spectrometry (SIMS) and Rutherford backscattering (RBS) to determine the $^{13>C migration. $^{13>C was observed to migrate both to the inner (largest deposit), outer divertor (less), and the floor tiles (least). This paper reports the EDGE2D/NIMBUS based modelling of the carbon migration. The emphasis is on the comparison of the 2007 results with the 2001 results where both injections were from the machine top but ELMs were present in 2007 but not present in 2001. The ELMs seemed to cause more $^{13>C re-erosion near the inner strike point. Also of interest is the difference in the Private Flux Region deposits where the changes in divertor geometry between 2004 and 2007 caused differences in the deposits. In 2007, the tilting of the load bearing tile caused regions of the PFR to be shadowed from the inner strike point which were not shadowed in 2004, indicating $^{13>C neutrals originated from the OSP.",
    keywords = "plasma physics, fusion energy",
    author = "J.D. Strachan and Jari Likonen and Antti Hakola and J.P. Coad and A. Widdowson and Seppo Koivuranta and D.E. Hole and M. Rubel and {JET-EFDA collaborators}",
    note = "HUO: Conference Paper P1.030 CO:Princeton University, NJ, USA CO:Culham Science Centre, United Kingdom CA2: TK202 CA: Cluster5",
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    Strachan, JD, Likonen, J, Hakola, A, Coad, JP, Widdowson, A, Koivuranta, S, Hole, DE, Rubel, M & JET-EFDA collaborators 2010, 'Modeling the 2007 JET 13C migration experiments', Bulletin of the American Physical Society, vol. 55, no. 15, PP9.00139.

    Modeling the 2007 JET 13C migration experiments. / Strachan, J.D.; Likonen, Jari; Hakola, Antti; Coad, J.P.; Widdowson, A.; Koivuranta, Seppo; Hole, D.E.; Rubel, M.; JET-EFDA collaborators.

    In: Bulletin of the American Physical Society, Vol. 55, No. 15, PP9.00139, 2010.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Modeling the 2007 JET 13C migration experiments

    AU - Strachan, J.D.

    AU - Likonen, Jari

    AU - Hakola, Antti

    AU - Coad, J.P.

    AU - Widdowson, A.

    AU - Koivuranta, Seppo

    AU - Hole, D.E.

    AU - Rubel, M.

    AU - JET-EFDA collaborators

    N1 - HUO: Conference Paper P1.030 CO:Princeton University, NJ, USA CO:Culham Science Centre, United Kingdom CA2: TK202 CA: Cluster5

    PY - 2010

    Y1 - 2010

    N2 - Using the last run day of the 2007 JET experimental campaign, $^{13>CH$_{4> was introduced repeatedly from the vessel top into a single plasma type (H-mode, I$_{p>= 1.6 MA, B$_{t>= 1.6 T). Similar experiments were performed in 2001 (vessel top into L-Mode) and 2004 (outer divertor into H-Mode). Divertor and wall tiles were removed and been analysed using secondary ion mass spectrometry (SIMS) and Rutherford backscattering (RBS) to determine the $^{13>C migration. $^{13>C was observed to migrate both to the inner (largest deposit), outer divertor (less), and the floor tiles (least). This paper reports the EDGE2D/NIMBUS based modelling of the carbon migration. The emphasis is on the comparison of the 2007 results with the 2001 results where both injections were from the machine top but ELMs were present in 2007 but not present in 2001. The ELMs seemed to cause more $^{13>C re-erosion near the inner strike point. Also of interest is the difference in the Private Flux Region deposits where the changes in divertor geometry between 2004 and 2007 caused differences in the deposits. In 2007, the tilting of the load bearing tile caused regions of the PFR to be shadowed from the inner strike point which were not shadowed in 2004, indicating $^{13>C neutrals originated from the OSP.

    AB - Using the last run day of the 2007 JET experimental campaign, $^{13>CH$_{4> was introduced repeatedly from the vessel top into a single plasma type (H-mode, I$_{p>= 1.6 MA, B$_{t>= 1.6 T). Similar experiments were performed in 2001 (vessel top into L-Mode) and 2004 (outer divertor into H-Mode). Divertor and wall tiles were removed and been analysed using secondary ion mass spectrometry (SIMS) and Rutherford backscattering (RBS) to determine the $^{13>C migration. $^{13>C was observed to migrate both to the inner (largest deposit), outer divertor (less), and the floor tiles (least). This paper reports the EDGE2D/NIMBUS based modelling of the carbon migration. The emphasis is on the comparison of the 2007 results with the 2001 results where both injections were from the machine top but ELMs were present in 2007 but not present in 2001. The ELMs seemed to cause more $^{13>C re-erosion near the inner strike point. Also of interest is the difference in the Private Flux Region deposits where the changes in divertor geometry between 2004 and 2007 caused differences in the deposits. In 2007, the tilting of the load bearing tile caused regions of the PFR to be shadowed from the inner strike point which were not shadowed in 2004, indicating $^{13>C neutrals originated from the OSP.

    KW - plasma physics

    KW - fusion energy

    M3 - Article

    VL - 55

    JO - Bulletin of the American Physical Society

    JF - Bulletin of the American Physical Society

    SN - 0003-0503

    IS - 15

    M1 - PP9.00139

    ER -