Wave-Particle Interactions in the Solar-Terrestrial Environment

日地环境中的波粒相互作用

• 批准号: 8813255
• 负责人: Martin Goldman
• 金额: $ 38.76万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-08-01 至 1992-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8813255&HistoricalAwards=false
• 关键词: Wave; Particle; Interactions; Solar; Terrestrial

This grant will support a study of a variety of related naturally-occurring processes involving the interaction of high- energy electrons with electromagnetic waves and with plasma waves in the solar-terrestrial environment. These processes are important for our understanding of solar-flare-related radiation emitted from the sun's lower corona and from the solar wind, and for our understanding of the propagation, stability and emission properties of electron streams, including streams of solar origin, high-energy electrons in the ambient solar wind, electron beams produced near planetary bowshocks, and precipitating electrons in Earth's auroral zones. It is intended investigate a variety of wave instabilities driven by electron velocity anisotropy ("whistler-beam-modes", whistlers, "Weibel" modes, etc.), and by parallel energy inversion (electron plasma waves, etc.). The nonlinear evolution of waves and electron distributions in magnetized plasmas, such as the aurora and the lower solar corona, will be treated using state-of-the-art supercomputer simulations. It is expected to produce the first three-dimensional studies of fully-developed strong plasma wave turbulence excited by electron streams in the solar wind during Type III events, and by electron beams near Earth's bowshock. The proposed research emphasizes basic plasma processes which are strongly rooted in satellite observations of waves and particles.

该补助金将支持各种相关的研究 自然发生的过程涉及高- 能量电子与电磁波和等离子体波 在日地环境中。 这些过程 对我们理解太阳耀斑相关辐射很重要 从太阳较低的日冕和太阳风中发出， 对于我们理解的传播，稳定性和发射 电子流的性质，包括太阳流 起源，高能电子在周围的太阳风，电子 在行星弓形激波附近产生的光束， 地球极光带的电子 它的目的是研究各种波的不稳定性 由电子速度各向异性（“哨声束模式”， 哨声、“Weibel”模式等），通过平行能量 反转（电子等离子体波等）。 非线性发展 磁化等离子体中的波和电子分布， 如极光和较低的日冕，将被处理， 最先进的超级计算机模拟 预计将 制作了第一个三维的研究， 强等离子体波湍流激发的电子流在 第三类事件期间的太阳风，以及附近的电子束 地球的弓形震波。 拟议的研究强调基础血浆 这些过程深深植根于卫星观测， 波和粒子。