Observation of Blobs and Holes in the Boundary Plasma of EAST Tokamak

Observation of Blobs and Holes in the Boundary Plasma of EAST Tokamak
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东托卡马克边界等离子体中斑点和空洞的观测

DOI:
10.1088/1009-0630/13/4/05
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发表时间:
2011-08
期刊:
等离子体科学与技术(英文版)
影响因子:
--
通讯作者:
Jiang Min
Jiang Min
中科院分区:
其他
文献类型:
--
作者:
Rasmussen, J. Juul;Xu Guosheng;Zhang Wei;Chang Jiafeng;Wang Liang;Liu Shaocheng;Liu Peng;Wang Huiqian;Jiang Min

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利用快速往复运动的朗缪尔探针研究了EAST边缘和刮削层(SOL)的间歇对流输运。洞,作为等离子体结构的一部分,被检测到的剪切层内的第一次。湍流的振幅概率分布函数是强烈偏斜的,在SOL区域中正偏斜事件(“斑点”)占主导地位,在剪切层内负偏斜事件(“洞”)占主导地位。统计特性与JET以前的观测结果一致。对斑点和空穴的产生机理进行了讨论。此外,还分析了它们的爆发结构和动力学特征.
Intermittent convective transport at the edge and in the scrape-off layer (SOL) of EAST was investigated by using fast reciprocating Langmuir probe. Holes, as part of plasma structures, were detected for the first time inside the shear layer. The amplitude probability distribution function of the turbulence is strongly skewed, with positive skewed events ("blobs") prevailing in the SOL region and negative skewed events ("holes") dominant inside the shear layer. The statistical properties coincide with previous observations from JET. The generation mechanism of blobs and holes is also discussed. In addition burst structure and dynamics character of them are also presented.
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