Possible signatures of dissipation from time-series analysis techniques using a turbulent laboratory magnetohydrodynamic plasma
Possible signatures of dissipation from time-series analysis techniques using a turbulent laboratory magnetohydrodynamic plasma
复制标题
使用湍流实验室磁流体动力学等离子体的时间序列分析技术可能产生的耗散特征
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Ariel B. Rock
中科院分区：
文献类型：
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作者：
D. Schaffner;Michael R. Brown;Ariel B. Rock
在斯沃斯莫尔球面马克实验上测量的磁涨落频谱是宽带的，并且呈现出接近柯尔莫哥洛夫5/3的标度。它的特点是一个陡峭的区域，这是指示类似于在流体和magnetohydrodynamicturbulence系统中观察到的磁波动能量耗散。两个非频谱为基础的时间序列分析技术，以寻求其他可能的签名湍流耗散超出只是波动谱的陡化。这里提出的结果的平坦度，排列熵，和统计复杂性，其中每一个表现出特定的字符在频谱陡峭的尺度，然后可以比较的频谱的行为。
The frequency spectrum of magnetic fluctuations as measured on the Swarthmore Spheromak Experiment is broadband and exhibits a nearly Kolmogorov 5/3 scaling. It features a steepening region which is indicative of dissipation of magnetic fluctuationenergy similar to that observed in fluid and magnetohydrodynamicturbulence systems. Two non-spectrum based time-series analysis techniques are implemented on this data set in order to seek other possible signatures of turbulent dissipation beyond just the steepening of fluctuation spectra. Presented here are results for the flatness, permutation entropy, and statistical complexity, each of which exhibits a particular character at spectral steepening scales which can then be compared to the behavior of the frequency spectrum.
MAST 中离子温度梯度对磁构型、旋转剪切和湍流热通量的局部依赖性
DOI：
10.48550/arxiv.1211.2883
发表时间：
2012
期刊：
arXiv e-prints
影响因子：
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作者：
Ghim
通讯作者：
Ghim