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Report No.
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MHD stability due to internal transport barrier and its effect on the transport

Ozeki, Takahisa; Aiba, Nobuyuki; Hayashi, Nobuhiko; Takizuka, Tomonori; Tokuda, Shinji

The advanced tokamak plasma has strongly coupling of physical-factors with widely different time, which make the complexity and autonomy. Therefore, it is a crucial issue to clarify these complex plasmas and to control the autonomous plasma. Modeling of each physical factor and an integration of models are useful to understand the complex plasma and to control the autonomous plasma. JAEA has developted the intergated simulation code TOPICS-IB with the stability code MARG2D. Here, we investigate an effect of the local steep pressure gradient at the internal transport barrier on the MHD stability. Also, the dynamic behaviours after the collapse by the MHD instability are simulated, and the sustainment of the advanced tokamak plasma is discussed.

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