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.

宽频带静电噪声（BEN）是穿越地球磁尾的卫星经常观测到的噪声。 该项目将建立在一个新的模型的初步结果的生成BEN。 该模型既有源区域的捕获粒子孤立波，以及一个更大的区域的宽带非孤立波。 新的工作将发展非线性孤立波理论。 该项目还将综合对每种波的独特理论解释。 有三项主要任务。 (1)阐明由ISEE-1卫星观测到的非孤立束驱动等离子体不稳定性。 等离子体的不均匀性和不稳定性饱和的作用将被检查。 (2)分析了磁场对光束驱动波中粒子俘获产生的非线性模的影响。 在广义Bernstein-Green-Kruskal（BGK）模型下，分析了孤立波中俘获粒子的动力学。 (3)将前两项任务的结果综合为BEN的起源，演变和动态的统一图片。