Statistical analysis technique for estimation of causal relationship in plasma turbulence

研究成果: ジャーナルへの寄稿記事

3 引用 (Scopus)

抄録

A new method of analyzing the causal relationship of the interaction between various fluctuating quantities and the mean gradient in turbulent plasmas is proposed. This method involves (1) calculating the correlation coefficient R and the directional area A for the pair of turbulent quantities of interest, and (2) creating a time ensemble consisting of (R; A) during many fluctuation periods. The statistical features of each ensemble can be used to determine the order of occurrence, and hence, the causal relationship between the two fluctuating quantities. We apply this analytical method to the analysis of a plasma in which the drift wave and interchange mode interact with and are modulated by the density gradient. The causal relationship between the drift wave and the density gradient is discussed.

元の言語英語
記事番号024501
ジャーナルJournal of the Physical Society of Japan
79
発行部数2
DOI
出版物ステータス出版済み - 2 1 2010

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plasma turbulence
statistical analysis
gradients
correlation coefficients
occurrences
interactions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

これを引用

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abstract = "A new method of analyzing the causal relationship of the interaction between various fluctuating quantities and the mean gradient in turbulent plasmas is proposed. This method involves (1) calculating the correlation coefficient R and the directional area A for the pair of turbulent quantities of interest, and (2) creating a time ensemble consisting of (R; A) during many fluctuation periods. The statistical features of each ensemble can be used to determine the order of occurrence, and hence, the causal relationship between the two fluctuating quantities. We apply this analytical method to the analysis of a plasma in which the drift wave and interchange mode interact with and are modulated by the density gradient. The causal relationship between the drift wave and the density gradient is discussed.",
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T1 - Statistical analysis technique for estimation of causal relationship in plasma turbulence

AU - Kamataki, Kunihiro

AU - Itoh, Kimitaka

AU - Itoh, Sanae

AU - fujisawa, akihide

AU - Shigeru, Inagaki

AU - Nagashima, Yoshihiko

AU - Yagi, Masatoshi

AU - Yamada, Takuma

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AB - A new method of analyzing the causal relationship of the interaction between various fluctuating quantities and the mean gradient in turbulent plasmas is proposed. This method involves (1) calculating the correlation coefficient R and the directional area A for the pair of turbulent quantities of interest, and (2) creating a time ensemble consisting of (R; A) during many fluctuation periods. The statistical features of each ensemble can be used to determine the order of occurrence, and hence, the causal relationship between the two fluctuating quantities. We apply this analytical method to the analysis of a plasma in which the drift wave and interchange mode interact with and are modulated by the density gradient. The causal relationship between the drift wave and the density gradient is discussed.

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