Effect of Externally Driven Magnetic Islands on Resistive Ballooning Turbulence

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  • NISHIMURA Seiya
    National Institute for Fusion Science, Toki 509-5292, Japan
  • YAGI Masatoshi
    Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan Japan Atomic Energy Agency, Naka 311-0193, Japan

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Description

Turbulent transport in the edge region of tokamak plasmas is simulated using a reduced set of magnetohydrodynamic equations. Repetitive and intermittent transport bursts driven by resistive ballooning turbulence with external heating are observed. The effect of a resonant magnetic perturbation (RMP) on turbulent heat transport is examined, where the electromagnetic response of the plasma to the RMP is solved consistently. The penetration of the RMP excites a magnetic island chain and damps the poloidal flow near the magnetic islands. The transport bursts are found to be replaced by more moderate and continuous transport. The change in the transport pattern is associated with the effect of the RMP on nonlinear coupling of fluctuations.

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research 6 2403119-2403119, 2011

    The Japan Society of Plasma Science and Nuclear Fusion Research

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