Wave-particle Interactions and Radio Emission Processes in Solar Terrestrial Environments

日地环境中的波粒相互作用和无线电发射过程

• 批准号: 9905508
• 负责人: Peter Yoon
• 金额: $ 7.4万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-10-01 至 2001-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9905508&HistoricalAwards=false
• 关键词: Wave; particle; Interactions; Radio; Emission

The investigator will formulate and numerically solve a fully self-consistent set of particle and wave kinetic equations, together with an instantaneous dispersion equation, to describe the interactions of electron beams and background plasma. This process involves the excitation of Langmuir waves, various non-linear processes, and the eventual emission of electromagnetic radiation. The main effort is to extend a new, generalized, weak turbulence theory - developed by the principal investigator - applicable to beam-plasma interactions in the solar and interplanetary environment. The new approach may also have major consequences in the general field of plasma physics research and the study of microscopic turbulent plasma processes in particular. In this phase of the research, the investigator will concentrate on the nature of the generalized nonlinear dispersion equation for weakly turbulent plasmas, and understanding of the nonlinear eigenmode.

研究人员将制定和数值求解一组完全自洽的粒子和波动力学方程，以及瞬时色散方程，以描述电子束和背景等离子体的相互作用。该过程涉及朗缪尔波的激发、各种非线性过程以及最终发射电磁辐射。主要的努力是扩展一个新的，广义的，弱湍流理论-由首席研究员开发-适用于在太阳和行星际环境中的束-等离子体相互作用。这种新方法也可能在等离子体物理研究的一般领域，特别是微观湍流等离子体过程的研究中产生重大影响。在这一阶段的研究中，研究人员将集中在弱湍流等离子体的广义非线性色散方程的性质，以及对非线性本征模的理解。