Multi-scale Interaction between MHD, Turbulence and Transport in Tokamak Plasmas
نویسندگان
چکیده
The recent achievement in the simulation study of multi-scale interaction among MHD, turbulence and transport is reported. Firstly, we discuss the formation and collapse of Internal Transport Barrier (ITB) in Tokamaks. The meso-scale structures are generated by three-wave interaction among drift wave turbulence. These structures interact each other, which generate the global mode around barrier location. This leads to the soft collapse of ITB. Secondly, we discuss multi-scale interaction among tearing mode and drift wave turbulence. The growth of tearing mode is accelerated by incoherent emission of drift wave turbulence. The possibility of sub-critical excitation and nonlinear sustainment of the magnetic island is discussed.
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تاریخ انتشار 2009