SHINE: Nonlinear Electrostatic Structures in the Interplanetary Medium

SHINE：行星际介质中的非线性静电结构

• 批准号: 0638461
• 负责人: Li-Jen Chen
• 金额: $ 6.13万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-12-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0638461&HistoricalAwards=false
• 关键词: SHINE; Nonlinear; Electrostatic; Structures; Interplanetary

Nonlinear, electrostatic structures in the form of isolated electric field pulses have been observed in the solar wind and at boundaries such as planetary shocks, magnetopauses, and magnetosheaths. This study of these nonlinear structures will focus on two main tasks: (i) to analytically model the observed pulses, study their steady-state properties, and numerically evolve the solutions to learn their dynamical properties, and (ii) to identify isolated electric field pulses in the existing and new data sets from missions that explore the interplanetary medium to provide observational input and constraints for the theoretical analysis. In addition, this investigation seeks to address the significance of these nonlinear pulses by establishing their properties in the theoretical and observational domains. As the plasma in the interplanetary medium is largely collisionless, this study of solitary structures has fundamental value for understanding how collisionless plasma self-consistently support nonlinear waves.

在太阳风和边界，如行星激波、磁层和磁鞘中，已经观察到孤立电场脉冲形式的非线性静电结构。 对这些非线性结构的研究将集中在两个主要任务上：（i）对观测到的脉冲进行分析建模，研究其稳态特性，并通过数值方法来研究其动力学特性，以及（ii）在探索行星际介质的任务的现有和新数据集中识别孤立的电场脉冲，为理论分析提供观测输入和约束。 此外，这项调查旨在解决这些非线性脉冲的意义，建立他们的理论和观测领域的属性。 由于行星际介质中的等离子体在很大程度上是无碰撞的，孤立子结构的研究对于理解无碰撞等离子体如何自洽地支持非线性波具有重要价值。