Plasma Instabilities and Turbulent Heating in Lower Ionosphere: Theory and Simulations

低电离层中的等离子体不稳定性和湍流加热：理论与模拟

• 批准号: 0332354
• 负责人: Yakov Dimant
• 金额: $ 28.69万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-01-01 至 2006-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0332354&HistoricalAwards=false
• 关键词: Plasma; Instabilities; Turbulent; Heating; Lower

Small-scale ionospheric structures, particularly E-region irregularities, are modeled using linear and non-linear numerical techniques. Thermal feedback from ions and electrons is studied using standard dispersion relations in a plasma characterized by ambient temperature and density gradients. Inelastic collisional electron cooling modeling is compared with more complex cooling functions. A three-dimensional numerical simulator is used to study to electron heating events in turbulence, and to model small-scale E-region turbulence in general.

小尺度电离层结构，特别是 E 区不规则性，使用线性和非线性数值技术进行建模。 使用以环境温度和密度梯度为特征的等离子体中的标准色散关系来研究离子和电子的热反馈。 将非弹性碰撞电子冷却模型与更复杂的冷却函数进行比较。 三维数值模拟器用于研究湍流中的电子加热事件，并模拟小规模 E 区湍流。