HF Heater Effect on Natural Spread F Phenomenon at Arecibo, Puerto Rico

高频加热器对波多黎各阿雷西博自然扩散 F 现象的影响

• 批准号: 9804324
• 负责人: Min-Chang Lee
• 金额: $ 3.5万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-01-01 至 1999-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9804324&HistoricalAwards=false
• 关键词: HF; Heater; Effect; Natural; Spread

The investigator, with several students, uses the Arecibo Versatile Toroidal Facility (VTF) in laboratory simulation experiments to study the role of lower hybrid waves in ionospheric plasma modifications. In recent experiments, the spectrum of Langmuir waves combines the PDI decay spectrum and a different decay spectrum. This new decay spectrum may stem from parametric decay of O-mode wave; compared with the PDI process, it requires a higher threshold, exceeded by the newly upgraded Arecibo heater. Using the 'tilted' HF heater, the PI aims to understand the physical mechanisms of HF heater-enhanced Langmuir wave turbulence.

研究人员和几名学生在实验室模拟实验中使用阿雷西博多功能环形设施，研究低杂波在电离层等离子体修改中的作用。 在最近的实验中，朗缪尔波的光谱结合了PDI衰变光谱和不同的衰变光谱。 这种新的衰减谱可能源于O模式波的参数衰减;与PDI过程相比，它需要更高的阈值，新升级的Arecibo加热器超过了该阈值。 使用“倾斜”HF加热器，PI旨在了解HF加热器增强朗缪尔波湍流的物理机制。