Observation of Nonlinear Coupling between Low Frequency Coherent Modes and Background Turbulence in LMD-U

Tatsuya KOBAYASHI; Shigeru INAGAKI; Hiroyuki ARAKAWA; Stella OLDENBüRGER; Makoto SASAKI; Yoshihiko NAGASHIMA; Takuma YAMADA; Satoru SUGITA; Masatoshi YAGI; Naohiro KASUYA; Akihide FUJISAWA; Sanae-I. ITOH; Kimitaka ITOH

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Observation of Nonlinear Coupling between Low Frequency Coherent Modes and Background Turbulence in LMD-U

机译：LMD-U中低频相干模和背景湍流之间非线性耦合的观察

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A solitary wave like fluctuating structure is observed in the Large Mirror Device-Upgrade (LMD-U) under relatively high neutral pressure conditions. Ion saturation current fluctuations are measured and Fourier and wavelet power spectra are calculated. Temporal behavior of fluctuation power and strength of nonlinear coupling of low frequency coherent mode and background turbulence in a specific frequency region is analyzed. This is achieved using wavelet spectral and bispectral analyses with conditional averaging.

机译：在相对较高的中压条件下，大型镜面装置升级版（LMD-U）中观察到了孤立的波状波动结构。测量离子饱和电流波动，并计算傅立叶和小波功率谱。分析了特定频率范围内低频相干模和背景湍流的起伏功率和非线性耦合强度的时间行为。这是通过使用小波光谱和双光谱分析以及条件平均来实现的。

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《Plasma and Fusion Research》 |2011年第3期|共1页
作者
Tatsuya KOBAYASHI; Shigeru INAGAKI; Hiroyuki ARAKAWA; Stella OLDENBüRGER; Makoto SASAKI; Yoshihiko NAGASHIMA; Takuma YAMADA; Satoru SUGITA; Masatoshi YAGI; Naohiro KASUYA; Akihide FUJISAWA; Sanae-I. ITOH; Kimitaka ITOH;
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中图分类等离子体物理学;
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2. Vibrations of nonlinear elastic lattices: low- and high-frequency dynamic models, internal resonances and modes coupling [J] . Andrianov Igor V, Danishevskyy Vladyslav V., Rogerson Graham Proceedings of the Royal Society. Mathematical, physical and engineering sciences . 2020,第2236期

机译：非线性弹性晶格的振动：低频和高频动态模型，内部共振和模式耦合
3. Observation of Low Frequency Ion Mode Turbulence in Tokamak Plasma [J] . 王贵鼎, 刘万东, 俞昌旋, 中国物理快报：英文版 . 1998,第008期

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4. Lateral mode frequency locking in fiber pump lasers: observations disputing nonlinear coupling mechanisms [C] . Gordon, R., Xu, . 1998

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5. Investigations of the role of nonlinear couplings in structure formation and transport regulation in plasma turbulence. [D] . Holland, Christopher George. 2003

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6. Coherent Structure Formation through nonlinear interactions in 2D Magnetohydrodynamic Turbulence [O] . Elisa De Giorgio, Sergio Servidio, Pierluigi Veltri -1

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7. Strong coupling between coherent gratings due to nonlinear spatial frequency mixing in Bi₁₂SiO₂₀ [O] . Andersen Peter E., Buchhave P., Petersen Paul Michael 1996

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8. A Review of Nonlinear Low Frequency (LF) Wave Observations in Space Plasmas: On the Development of Plasma Turbulence [R] . Tsurutani, B., Glassmeir, K., Neubauer, F. 1995

机译：空间等离子体中非线性低频（LF）波观测研究综述 - 等离子体湍流的发展

Observation of Nonlinear Coupling between Low Frequency Coherent Modes and Background Turbulence in LMD-U

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