Influence of magnetic field ripple on the intrinsic rotation of tokamak plasmas

M. F. F. Nave, T. Johnson, L.-G. Eriksson, K. Crombé, C. Giroud, M.-L. Mayoral, J. Ongena, Antti Salmi, Tuomas Tala, M. Tsalas

    Research output: Contribution to journalArticleScientificpeer-review

    35 Citations (Scopus)


    Using the unique capability of JET to monotonically change the amplitude of the magnetic field ripple, without modifying other relevant equilibrium conditions, the effect of the ripple on the angular rotation frequency of the plasma column was investigated under the conditions of no external momentum input. The ripple amplitude was varied from 0.08% to 1.5% in Ohmic and ion-cyclotron radio-frequency (ICRF) heated plasmas. In both cases the ripple causes counterrotation, indicating a strong torque due to nonambipolar transport of thermal ions and in the case of ICRF also fast ions.
    Original languageEnglish
    Article number105005
    Number of pages4
    JournalPhysical Review Letters
    Issue number10
    Publication statusPublished - 2010
    MoE publication typeA1 Journal article-refereed


    • plasma physics
    • fusion energy


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