Analysis on Relation Between Magnetic Structure and Bursty Fluctuation in SOL/Divertor Plasmas of LHD
Analysis on Relation Between Magnetic Structure and Bursty Fluctuation in SOL/Divertor Plasmas of LHD
复制标题
铲运机SOL/偏滤器等离子体中磁结构与突发涨落关系分析
DOI：
10.1002/ctpp.200610065
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发表时间：
2006
影响因子：
1.6
通讯作者：
A. Komori
中科院分区：
文献类型：
--
作者：
N. Ohno;S. Masuzaki;H. Miyoshi;S. Takamura;V. Budaev;T. Morisaki;N. Ohyabu;A. Komori
我们研究了大螺旋器件(LHD)的边缘磁结构与离子饱和电流的涨落特性之间的关系，用嵌入在外侧偏滤器片中的朗缪尔探头阵列(16通道)测量了离子饱和电流。边缘磁结构用KMAG和Watanabe程序计算。根据概率分布函数(p.d.f.)分析了涨落特性。复数Morlet小波分解。在偏滤器支腿的低场侧测量得到了较大的正偏斜，在偏滤器支路磁力线连接长度较长的偏滤器支腿的打点处观察到了负偏斜。起伏特性与等离子体密度及其梯度的相关性很弱。通过对等待时间统计数据的分析，发现等待时间统计不是泊松过程，SOC范式没有明确的特征。(2006 Wiley-VCH Verlag GmbH&Co.KGaA，Weinheim)
We have investigated a relation between the edge magnetic structure of the Large Helical Device (LHD) and the fluctuation properties of the ion saturation currents I sat measured by a Langmuir probe array (16 channels) embedded in an outboard divertor plate. The edge magnetic structure is calculated by KMAG and Watanabe codes. The fluctuation properties are analyzed based on the probability distribution function (p.d.f.) and complex Morlet wavelet decomposition. Large positive skewness was obtained from I sat measured at a low field side of a divertor leg and negative skewness was observed at striking point of the divertor leg, where the connection length of magnetic line of force is long. The fluctuation characteristics has very weak dependence of plasma density and its gradient. Waiting time statistics was analyzed to indicate that the waiting time statistics is not a Poisson process and there is no clear signature of SOC paradigm. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)