Direct observation of current in type-I edge-localized-mode filaments on the ASDEX upgrade tokamak

N. Vianello, M. Zuin, R. Cavazzana, Volker Naulin, Jens Juul Rasmussen, R. Schrittwieser, C. Ionita, F. Mehlmann, H.W. Müller, V. Rohde, M. Maraschek

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Magnetically confined plasmas in the high confinement regime are regularly subjected to relaxation oscillations, termed edge localized modes (ELMs), leading to large transport events. Present ELM theories rely on a combined effect of edge current and the edge pressure gradients which result in intermediate mode number (n≅10-15) structures (filaments) localized in the perpendicular plane and extended along the field lines. By detailed localized measurements of the magnetic field perturbation associated to type-I ELM filaments, it is shown that these filaments carry a substantial current. © 2011 American Physical Society.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume106
    Issue number12
    Pages (from-to)125002
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2011

    Keywords

    • Fusion energy

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