Collaborative Research: Applying the AGO Network to Energy Transfer in the Radiation Belts and Remote Sensing of Auroral Plasma Processes

合作研究：将AGO网络应用于辐射带能量传输和极光等离子体过程遥感

• 批准号: 1141817
• 负责人: James LaBelle
• 金额: $ 20万
• 依托单位: Dartmouth College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-01 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1141817&HistoricalAwards=false
• 关键词: Collaborative; Research; Applying; AGO; Network

With this award, researchers at Dartmouth College and Stanford University will be addressing outstanding scientific questions regarding the energy transfer in the Earth's radiation belts and auroral plasma physics. Energetic plasma interacting with the geomagnetic field in the near-Earth space (geospace) environment emits electromagnetic waves across the radio spectrum, and ground-based measurements of these waves are used as diagnostic tools to investigate various processes in geospace. This investigation takes advantage of an existing network of radio receivers located in Antarctica from -70 to -85 degrees of invariant geomagnetic latitude and operating in the frequency range from extra low to high frequencies (ELF ~300 Hz to HF ~5 MHz). The Antarctic continent is ideally suited for these types of natural radio wave experiments since it is largely devoid of anthropogenic electromagnetic interference such as power line harmonics and radio frequency broadcast transmissions. The project will focus on studies of three geophysically important plasma waves. The first, chorus wave is believed to be a major driver of radiation belt electron acceleration and loss. The other two waves, auroral hiss and auroral kilometric radiation (AKR), are generated in the auroral acceleration region and have the potential to be used for remote sensing of this complex and poorly understood near-Earth region. The proposed studies are motivated by a recent, exciting detection of AKR on the Earth?s surface which was unexpected since the currently accepted theory for these waves generation predicts beaming of the radiation only outward away from Earth. This research also contributes to the training and education of both the young scientists and undergraduate students.

有了这个奖项，达特茅斯学院和斯坦福大学的研究人员将解决有关地球辐射带和极光等离子体物理学的能量转移的杰出科学问题。能量等离子体与近地磁场（地球空间）环境中的地磁场相互作用，在整个无线电光谱上发出电磁波，这些波的基于地面的测量值用作研究地理空间中各种过程的诊断工具。这项研究利用了现有的无线电接收器网络，位于南极洲的无线电接收器网络从-70至-85度不变的地磁纬度，并且在频率范围内运行，从额外的低频到高频（ELF〜300 Hz至HF〜5 MHz）。南极大陆非常适合这些类型的自然无线电波实验，因为它在很大程度上没有人为的电磁干扰，例如电力线谐波和射频广播传播。该项目将集中于三个地球物理重要等离子体波的研究。首先，合唱波被认为是辐射带电子加速和损失的主要驱动力。其他两个波是在极光加速区域产生的，即极光嘶嘶声和极光碱辐射（AKR），并且有可能用于遥感该复合物且知之甚少的近地区域。提出的研究是由对地球表面AKR的最新检测到了意外的令人兴奋的检测，这是出乎意料的，因为这些波浪的生成的当前接受的理论可以预测辐射的光束，只能向外远离地球。这项研究还为年轻科学家和本科生的培训和教育做出了贡献。