Study of Plasma Turbulence by Means of Bispectrum Anaylyses

双谱分析研究等离子体湍流

• 批准号: 04650366
• 负责人: HAYAKAWA Masashi
• 金额: $ 1.28万
• 依托单位: The university of Electro-Communications
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650366/
• 关键词: プラズマ乱流; 非線形波動・波動相互作用; バイコヒーレンス解析; スペースプラズマ; サイプル電波

The experimental study on the nonlinear wave-wave interactions in the space plasma was carried out by using both the ISIS-2 satellite observations of Siple Station VLF transmitter signals and the Aureol-3 satellite observations of Alpha VLF signals. We suceeded in analysing extremely a lot of data, and the results can be summarised as follows :(1)The analysis of Siple signals has indicated that we could detect the sideband structures on the ISIS-2 satellite, as was first observed by Tanaka, Hayakawa et al.(1987). Then the bispectrum analysis indicated that these sidebands are due to the nonlinear coupling between VLF transmitter signal and the pre-existing ELF emission in the ionosphere.The further analyzes of Aureol-3 satellite data of Alpha VLF transmission, has yielded some more evidence of the detection of sideband structures due to the monlinear interaction. The direction finding measurement has suggested that this interaction takes place between an electromagnetic strong VLF signal and a quasi-electrostatic ELF emission. The sideband wave is also found to be quasi-electrostatic, which can be confirmed by the fact that such sidebands are only detected on electric antennas.

利用ISIS-2卫星对simple Station VLF发射机信号的观测和Aureol-3卫星对Alpha VLF信号的观测，对空间等离子体中非线性波波相互作用进行了实验研究。我们成功地分析了非常多的数据，结果可以总结如下：(1)对简单信号的分析表明，我们可以在ISIS-2卫星上检测到边带结构，这是Tanaka， Hayakawa等人（1987）首先观察到的。双谱分析表明，这些边带是由于VLF发射机信号与电离层中存在的极低频发射之间的非线性耦合造成的。进一步分析了光环三号卫星的Alpha VLF传输数据，得到了由于非线性相互作用而检测到边带结构的更多证据。测向测量表明，这种相互作用发生在电磁强极低频信号和准静电极低频发射之间。边带波也被发现是准静电的，这可以通过这样的边带只在电天线上被检测到的事实来证实。

项目成果

V,Yu,Tvakhtengerts & M,Hayakawa: "A wave-wave interaction in whistler frequency range in space plasma" Jour.Geophysical Research(USA). 98. 19205-19217 (1993)

于特瓦赫滕格茨

V.Yu,TrakhtengerAs Θ M.Hayakawa: "A Wave-wave interaction in whistler frequency range in space plasma" Jour.Geophysical Research. 98. 19205-19217 (1993)

V.Yu，TrakhtengerAs θ M.Hayakawa：“空间等离子体中哨声频率范围内的波-波相互作用”Jour.Geophysical Research 98。19205-19217 (1993)

大浪 哲: "電離層プラズマ中での非線形波動・波動相互作用の観測と解析" 電子情報通信学会アンテナ・伝搬技術研究会報告. AP92-42. 17-24 (1992)

Satoshi Onami：“电离层等离子体中非线性波和波相互作用的观察和分析”电子、信息和通信工程师研究所天线和传播技术研究组的报告 AP92-42 (1992)。

V.Yu.Trakhtengerts and M.Hayakawa: "A wave-wave interaction in whistler frequency range in space plasma" Jour.Geophysical Physics. vol.98. 19205-19217 (1993)

V.Yu.Trakhtengerts 和 M.Hayakawa：“空间等离子体中哨声频率范围内的波-波相互作用”Jour.地球物理物理学。

S.Ohnami,M.Hayakawa,T.F.Bell,T.Ordoh: "Nonlinear wave-wave interactions in the Subauroral ionosphere on the basis of ISIS-2 satellite observations of Siple Station VLF signals" Geophysical Research Letters. 20. 739-742 (1993)

S.Ohnami、M.Hayakawa、T.F.Bell、T.Ordoh：“基于 ISIS-2 卫星对 Siple 站 VLF 信号观测的极光下电离层中的非线性波波相互作用”地球物理研究快报。