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Phenomena of limit-cycle oscillations in the Globus-M spherical tokamak

A.Yu. Yashin, V.V. Bulanin, V.K. Gusev, G.S. Kurskiev, M.I. Patrov, A.V. Petrov, Yu.V. Petrov, S.Yu. Tolstyakov2018年被引用 19Nuclear FusionIF 3出版社

The results of limit cycle oscillation (LCO) studies in the spherical Globus-M tokamak are presented. The oscillations of E  ×  B drift velocity, turbulence level, Dα light emission, plasma density and magnetic field with the LCO frequency were simultaneously observed. Properties of two LCO regimes, with and without the transition to the H-mode, are compared. The results of a correlation analysis between the flows and turbulence require the use of a 1D model of the LCO development. The bicoherent analysis demonstrates that zonal flows dominate in LCOs. An up–down asymmetry of the poloidal magnetic field oscillations with the LCO frequency is found.

日本語訳

球形トカマクGlobus-Mにおけるリミットサイクル振動(LCO)の研究結果を提示する。E×Bドリフト速度、乱流レベル、Dα光、プラズマ密度、および磁場の振動がLCO周波数で同時に観測された。Hモードへの遷移を伴う場合と伴わない場合の2つのLCOレジームの特性を比較した。流れと乱流の間の相関解析の結果は、LCO発展の1次元モデルの使用を必要とする。バイコヒーレント解析は、ゾーナルフローがLCOにおいて支配的であることを示している。LCO周波数でのポロイダル磁場振動に上下非対称性が存在することが見出された。

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Spherical tokamakGlobus-M
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