Coherent generation of the terrestrial kilometric radiation by nonlinear beatings between electrostatic waves
Coherent generation of the terrestrial kilometric radiation by nonlinear beatings between electrostatic waves
复制标题
通过静电波之间的非线性跳动相干产生地面千米辐射
DOI：
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
R. Pellat
中科院分区：
文献类型：
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作者：
A. Roux;R. Pellat
在分析中，静电和磁化等离子体的静电等离子体的传播是由Éleigntrons的极光驱动的，这些波是驱动的，在它们倾向于同时散发其组的同时，它们会遭受进一步的几何扩增。与地理磁场对齐。由于此过程，应观察到非常狭窄的光谱的大型杂种频率。 tnree波过程，取决于强烈的电磁辐射。
The propagation of electrostatic plasma waves in an inhomogeneous and magnetized plasma is studied analytically. Thèse waves, which are driven uns table by auroral beams of électrons, are shown to suffer a further geometrical amplification while they propagate towards résonances. Simultaneously their group velocities tend to be aligned with the geo-magnetic field. Then it is shown that the electrostatic energy tends to accumulate at, or near wLH and v\m, the local lower and upper hybrid frequencies. Due to this process, large amplitude electrostatic waves with very narrow spectra should be observed near thèse frequencies at any place along the auroral field lines where intense beam driven instability takes place. Thèse intense quasi-monochromaticelectrostatic waves are then shown to give rise by a coherent-non-linear tnree wave process to an intense electromagnetic radiation. Depending upon the ratio ou