Source of Radiation Belt Electrons

辐射带电子源

• 批准号: 0233302
• 负责人: Xinlin Li
• 金额: $ 22.87万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-02-01 至 2007-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0233302&HistoricalAwards=false
• 关键词: Source; Radiation; Belt; Electrons

The source of the highly energetic electrons in the out radiation belt has remained a mystery. A model explaining the origin of the electrons through inward radial diffusion has been utilized to successfully explain many features of the radiation belt but the model requires a source of electrons with a high phase space density which must lie outside the radiation belt region. The radial transport model assumes that the first and (usually) the second adiabatic invariants are conserved, but the third is not. This implies that electrons must be transported inward from a region of higher phase space density. This project will utilize data from the Polar, Wind, SAMPEX and Los Alamos satellites to determine where that source region is and how it varies with solar wind conditions. The radial transport model will then be utilized to quantify the electron energization and compare the process with other competing processes such as localized heating by waves and recirculation.

OUT辐射带中高能量电子的来源仍然是一个谜。 通过向内径向扩散来解释电子来源的模型已被用来成功解释辐射带的许多特征，但是该模型需要具有高相空间密度的电子源，必须位于辐射带区域之外。 径向传输模型假设第一个和（通常）第二绝热不变剂是保守的，但第三个不是。 这意味着必须从高相空间密度的区域向内运输电子。 该项目将利用极性，风，Sampex和Los Alamos卫星的数据来确定该源区域的位置以及它如何随太阳风条件而变化。 然后，将利用径向传输模型来量化电子能量，并将该过程与其他竞争过程（例如通过波和再循环进行局部加热）进行比较。