Origins and Dynamics for the Variety of Broadband Electrostatic Waves in Earth's Magnetotail

地球磁尾中各种宽带静电波的起源和动力学

• 批准号: 0335583
• 负责人: Crockett Grabbe
• 金额: $ 19.89万
• 依托单位: University of Iowa
• 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: 2003-12-01 至 2008-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0335583&HistoricalAwards=false
• 关键词: Origins; Dynamics; Variety; Broadband; Electrostatic

Broadband electrostatic noise (BEN) is often observed by satellites traversing the earth's magnetotail. This project will build on the preliminary results of a new model for the generation of BEN. The model has both source region trapped-particle solitary waves as well as a much larger region of broadband non-solitary waves. The new work will develop the theory of the nonlinear solitary waves. The project will also synthesize unique theoretical explanations for each of the wave varieties. There are three primary tasks. (1) Elucidate the non-solitary, beam-driven plasma instabilities observed by the ISEE-1 satellite. The roles of plasma inhomogeneities and instability saturation will be examined. (2) Analyze the influences of the magnetic field on nonlinear modes created by particle trapping in waves driven by the beams. The dynamics of trapped particles in the solitary waves will be analyzed for a generalized Bernstein-Green-Kruskal (BGK) model. (3) Synthesis the results from the first two tasks into a unified picture for the origin, evolution and dynamics of BEN.

宽带静电噪声（BEN）通常是通过遍历地球磁尾的卫星观察到的。 该项目将基于为Ben的新模型的初步结果。 该模型既有源区域捕获的粒子孤立波，也具有更大的宽带非态波的区域。 新作品将发展非线性孤立波的理论。 该项目还将为每个波品种合成独特的理论解释。 有三个主要任务。 （1）阐明ISEE-1卫星观察到的非统一的，梁驱动的等离子体不稳定性。 血浆不均匀性和不稳定性饱和的作用将被检查。 （2）分析磁场对由梁驱动的波捕获在波浪中产生的非线性模式的影响。 将分析孤立波中捕获颗粒的动力学，用于广义的Bernstein-Green-Kruskal（BGK）模型。 （3）将前两个任务的结果综合为BEN的原点，演变和动力学的统一图片。