Identification of the ubiquitous Coriolis momentum pinch in JET tokamak plasmas: Letter

H. Weisen, Y. Camenen, A. Salmi, T.W. Versloot, P.C. de Vries, M. Maslov, Tuomas Tala, M. Beurskens, C. Giroud, JET-EFDA contributors

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    A broad survey of the experimental database of neutral beam heated plasmas in the JET tokamak has established the theoretically expected ubiquity, in rotating plasmas, of a convective transport mechanism which has its origin in the vertical particle drift resulting from the Coriolis force. This inward convection, or pinch, leads to inward transport of toroidal angular momentum and is characterized by pinch numbers RVφ, which rise from near unity at r/a ≈ 0.25 to around 5 at r/a ≈ 0.85. Linear gyrokinetic calculations of the Coriolis pinch number and the Prandtl number χφi are in good agreement with the experimental observations, with similar dependences on plasma parameters. The data, however, do not rule out contributions from different processes, such as residual stresses.
    Original languageEnglish
    Article number042001
    Number of pages6
    JournalNuclear Fusion
    Issue number4
    Publication statusPublished - 2012
    MoE publication typeA1 Journal article-refereed


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