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

电离层中高频引起的朗缪尔湍流的理论和观测研究

• 批准号: 9503147
• 负责人: Donald DuBois
• 金额: $ 14万
• 依托单位: Lodestar Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-08-01 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9503147&HistoricalAwards=false
• 关键词: Theoretical; Observational; Studies; HF; Induced

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.***

PI建议研究电离层中高频（HF）加热器诱导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、场对准的密度条纹或管道与HF诱导的湍流的关系。 最后，他将研究通过激发双等离子体衰变（TPD）不稳定性和受激拉曼散射（SRS）产生电离层朗缪尔湍流，这发生在反射密度的四分之一附近。