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

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    Keywords

    • plasma physics
    • fusion energy

    Cite this

    Strachan, J. D., Likonen, J., Hakola, A., Coad, J. P., Widdowson, A., Koivuranta, S., Hole, D. E., Rubel, M., & JET-EFDA collaborators (2010). Modeling the 2007 JET 13C migration experiments. Bulletin of the American Physical Society, 55(15), [PP9.00139].