Theoretical and Observational Studies of HF-Induced Langmuir Turbulence in the Ionosphere

PI提议研究电离层中高频（HF）加热器引起的等离子体湍流的三个理论和实验领域。首先，他将研究加热器开启后电子速度分布的演变。接下来，他将观察短尺度、场向密度条纹或管道与高频诱导湍流的关系。最后，他将研究由双等离子体衰变（TPD）不稳定性激发和受激拉曼散射（SRS）产生的电离层Langmuir湍流，它们发生在反射密度的四分之一附近

The PI proposes to investigate three areas of theoretical and experimental high-frequency (HF) heater-induced plasma turbulence in the ionosphere. First, he will study the evolution of the electron velocity distribution following heater turn-on. Next, he will observe the relationship of short-scale, field-aligned density striations, or ducts, to the HF-induced turbulence. Last, he will study the generation of ionospheric Langmuir turbulence by the excitation of the two-plasmon decay (TPD) instability and by stimulated Raman scattering (SRS), which occur near one quarter of the reflection density.***