Temporal-spatial structures of plasmas flows and turbulence around tearing mode islands in the edge tokamak plasmas
Temporal-spatial structures of plasmas flows and turbulence around tearing mode islands in the edge tokamak plasmas
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DOI：
10.1088/1741-4326/aa8341
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发表时间：
2017-09
期刊：
影响因子：
3.3
通讯作者：
K. Zhao;Y. Nagashima;Fuming Li;Yuejiang Shi;P. Diamond;J. Dong;K. Itoh;S. Itoh;G. Zhuang;H. Liu;Zhipeng Chen;J. Cheng;L. Nie;Yonghua Ding;Q. Hu;Z. Chen;B. Rao;Z. Cheng;L. Gao;X. Q. Zhang;Zhoujun Yang;Nengchao Wang;L. Wang;W. Jin;W. Yan;J. Xu;Y. Wu;Longwen Yan;A. Fujisawa;S. Inagaki;Y. Kosuga;M. Sasaki;J-Text Team
中科院分区：
文献类型：
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作者：
K. Zhao;Y. Nagashima;Fuming Li;Yuejiang Shi;P. Diamond;J. Dong;K. Itoh;S. Itoh;G. Zhuang;H. Liu;Zhipeng Chen;J. Cheng;L. Nie;Yonghua Ding;Q. Hu;Z. Chen;B. Rao;Z. Cheng;L. Gao;X. Q. Zhang;Zhoujun Yang;Nengchao Wang;L. Wang;W. Jin;W. Yan;J. Xu;Y. Wu;Longwen Yan;A. Fujisawa;S. Inagaki;Y. Kosuga;M. Sasaki;J-Text Team
给出了撕裂模岛周围等离子体流动和湍流的时空结构。实验是在J-TEXT托卡马克边缘等离子体中用朗缪尔探针阵列进行的。相关分析清楚地表明，流动具有类似于磁岛的m/n = 3/1的结构（m和n分别为极向和环向模数）。在q = 3的表面上，流动的势波动的符号反转，并且功率显著减小。在接近磁岛最后一个闭合磁通面时，形成径向拉长的流动结构。流动集中在分界线附近，呈现四极结构。湍流集中在X点附近，部分被困在磁岛内。
The temporal-spatial structures of plasma flows and turbulence around tearing mode islands are presented. The experiments were performed using Langmuir probe arrays in the edge plasmas of J-TEXT tokamak. The correlation analyses clearly show that the flows have similar structures of m/n = 3/1 as the magnetic island does (m and n are the poloidal and toroidal mode numbers, respectively). The sign of the potential fluctuations for the flows inverses and the powers significantly reduce at q = 3 surface. Approaching to the last closed flux surface for the magnetic islands, the radially elongated flow structure forms. The flows are concentrated near separatrix and show quadrupole structures. The turbulence is concentrated near X-point and partly trapped inside the magnetic islands.