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Localized modulation of turbulence by m/n  =  1/1 magnetic islands in the HL-2A tokamak

M. Jiang, Y. Xu, W. Chen, Z.B. Shi, J.Q. Li, W.X. Wang, Z.H. Qin, X.T. Ding, W.L. Zhong, X.Q. Ji2019年被引用 28Nuclear FusionIF 3出版社

Modulation of turbulent electron temperature fluctuations () and density fluctuations () by an m/n  =  1/1 tearing mode island was observed in the core plasma region of the HL-2A tokamak. High spatiotemporal resolution two-dimensional images of show the first evidence that the turbulence modulation occurs only when the island width exceeds a certain threshold value ( cm) and the modulation is localized merely in the inner area of the island due to significant alteration of local profiles and turbulence drives. Evidence also reveals that for large islands turbulence spreading takes place across the island region. The results are generally consistent with theories and simulations.

日本語訳

m/n = 1/1 テアリングモード磁気島による乱流電子温度揺動()と密度揺動()の変調が、HL-2A トカマクのコアプラズマで観測された。高時空間分解能二次元画像は、乱流変調が磁気島幅が特定の閾値( cm)を超えた場合にのみ発生し、その変調が局所プロファイルと乱流駆動の顕著な変化により、磁気島の内部領域のみに局在するという最初の証拠を示している。さらに、証拠は、大きな磁気島の場合、乱流拡散が磁気島領域全体にわたって発生することを明らかにしている。これらの結果は、理論およびシミュレーションと概ね一致している。

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