CEDAR: Electron Energization by Strong Turbulent Electric Fields in the Auroral E-Region

CEDAR：极光 E 区强湍流电场的电子能量化

• 批准号: 0003188
• 负责人: Gennady Milikh
• 金额: $ 18万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-12-15 至 2004-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0003188&HistoricalAwards=false
• 关键词: CEDAR; Electron; Energization; Strong; Turbulent

Abstract for Milikh, ATM-0003188This award addresses the quantitative physics of electron energization in the auroral E region which is known to be highly turbulent during times of vigorous auroral activity with values of the electron temperature reaching high values of 3000 K or greater. This electron heating is thought to be generated by waves (Farley-Buneman) or by the two-stream instability. The region where this electron heating occurs is located between 100 and 120 km where the electrons are magnetized (i.e., gyrates around the magnetic field line) and the ions are constrained by collisions to move in the direction of the neutral wind. The rate of electron heating would be calculated as a part of the development of a kinetic model for the electron energization in the auroral E-region caused by a large amplitude turbulent electric field. A numerical model represented by a Fokker-Planck code for the electron distribution function would be modified to include the relevant physical processes that become active by the presence of these turbulent electric fields. The successful execution of this award would provide an understanding and predictive capability for the operation of navigation, communication, and surveillance systems.

Milikh的摘要，ATM-0003188该奖项涉及极光E区电子温度的定量物理学，该区域在强烈的极光活动期间具有高度湍流，电子温度值达到3000 K或更高。 这种电子加热被认为是由波（Farley-Buneman）或双流不稳定性产生的。 发生这种电子加热的区域位于电子被磁化的100和120 km之间（即，围绕磁场线旋转），并且离子被碰撞约束为沿中性风的方向移动。 电子加热率的计算将作为一个动力学模型的一部分，在极光E-区由一个大振幅的湍流电场所造成的电子加热的发展。 由电子分布函数的Fokker-Planck代码表示的数值模型将被修改，以包括由于这些湍流电场的存在而变得活跃的相关物理过程。 该合同的成功执行将为导航、通信和监视系统的运行提供理解和预测能力。