Global migration of impurities in tokamaks

Antti Hakola, Markus Airila, C. Björkas, D. Borodin, S. Brezinsek, Paul Coad, M. Groth, A. Järvinen, A. Kirschner, Seppo Koivuranta, K. Krieger, T. Kurki-Suonio, Jari Likonen, V. Lindholm, T. Makkonen, M. Mayer, J. Miettunen, H.W. Müller, R. Neu, P. PeterssonV. Rohde, M. Rubel, A. Widdowson

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    Abstract

    The migration of impurities in tokamaks has been studied with the help of tracer-injection (13C and 15N) experiments in JET and ASDEX Upgrade since 2001. We have identified a common pattern for the migrating particles: scrape-off layer flows drive impurities from the low-field side towards the high-field side of the vessel. Migration is also sensitive to the density and magnetic configuration of the plasma, and strong local variations in the resulting deposition patterns require 3D treatment of the migration process. Moreover, re-erosion of the deposited particles has to be taken into account to properly describe the migration process during steady-state operation of the tokamak.
    Original languageEnglish
    Article number124029
    JournalPlasma Physics and Controlled Fusion
    Volume55
    Issue number12
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed

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    Hakola, A., Airila, M., Björkas, C., Borodin, D., Brezinsek, S., Coad, P., Groth, M., Järvinen, A., Kirschner, A., Koivuranta, S., Krieger, K., Kurki-Suonio, T., Likonen, J., Lindholm, V., Makkonen, T., Mayer, M., Miettunen, J., Müller, H. W., Neu, R., ... Widdowson, A. (2013). Global migration of impurities in tokamaks. Plasma Physics and Controlled Fusion, 55(12), [124029]. https://doi.org/10.1088/0741-3335/55/12/124029