Theoretical Studies on the Interaction of Powerful Radio Waves with the Ionosphere

这项提议旨在发展理论，以便更好地了解电离层高频加热实验的观测结果，从而更好地规划未来的加热实验。工作将集中在：(1)二次参数不稳定过程和非线性散射过程在产生二次受激电磁发射(SEE)中的作用，(2)在加热器调制的电喷流中由热不稳定性激发产生的ELF/VLF波，(3)由倾斜入射的HF加热器增强的等离子体谱线的新的光谱特征，以及(4)在弱湍流理论的背景下负责产生高能电子的物理过程。

This proposal aims to develop theories for a better understanding of the observational results of the ionospheric HF heating experiments, and thus for leading a better planning of future heating experiments. The work will focus on: (1) the role of secondary parametric instability processes together with nonlinear scattering processes on the generation of secondary stimulated EM emissions (SEEs), (2) generation of ELF/VLF waves by thermal instabilities excited in heater-modulated electrojet, (3) new spectral features of plasma lines enhanced by obliquely incident HF heater, and (4) physical process responsible for the generation of energetic electrons in the context of weak turbulence theory.***