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Low-frequency zonal flow eigen-structures in tokamak plasmas

V.I. Ilgisonis, V.P. Lakhin, N.A. Marusov, A.I. Smolyakov, E.A. Sorokina2022年Nuclear FusionIF 3出版社

The nonlocal eigenmode analysis of low-frequency zonal flows (ZFs) in toroidally rotating tokamak plasmas is performed in the framework of the reduced one-fluid ideal magnetohydrodynamic model. It is shown that for typical profiles of plasma parameters toroidal plasma rotation results in the global ZF formation on the periphery of plasma column. For some types of equilibria these ZFs are aperiodically unstable that leads to the excitation of the differential plasma rotation at the tokamak plasma edge.

日本語訳

非局所固有モード解析による、トロイダル回転トカマクプラズマ中の低周波帯状流(ZF)の解析を、簡約化された一流体理想磁気流体力学モデルの枠組みで行う。典型的なプラズマパラメータの分布に対して、トロイダルプラズマ回転はプラズマ柱周辺部における大域的ZF形成をもたらすことが示される。ある種の平衡状態では、これらのZFは非周期的に不安定となり、トカマクプラズマ端部における差動プラズマ回転の励起を引き起こす。

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Zonal flow
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