Inward Turbulent Transport Produced by Positively Sheared Radial Electric Field in Stellarators

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    Abstract

    Inward turbulent particle transport observed in the rf heated plasma of the H-1 toroidal heliac is reproduced in the CHS heliotron/torsatron by generating a region of positive radial electric field shear (Er’>0) using electron cyclotron resonance heating of the plasma edge. Empirical condition of the radial reversal of the turbulent flux derived from two experiments indicates that the shear electric field might be universally responsible for the recorrelation of the density and plasma potential fluctuations leading to the inward transport.

    Original languageEnglish
    Pages (from-to)6042-6045
    Number of pages4
    JournalPhysical Review Letters
    Volume84
    Issue number26
    DOIs
    Publication statusPublished - 2000

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