Electron Acceleration in Solar Flares and the Role of Plasma Turbulence

太阳耀斑中的电子加速和等离子体湍流的作用

• 批准号: 9613676
• 负责人: Vahe Petrosian
• 金额: $ 3.77万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-04-01 至 1998-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9613676&HistoricalAwards=false
• 关键词: Electron; Acceleration; Solar; Flares; Role

This project researches the energy release and particle acceleration mechanism in solar flares. The source of flare energy is the current-carrying magnetic field, and the bulk of this energy goes into the acceleration of particles, but exactly how the energy is dissipated or accelerates particles is uncertain. Direct heating, acceleration, and production of plasma waves or turbulence are possible dissipation channels. The PI will gain insight through comparing microwave, hard X-ray and gamma-ray observations with theoretical results in a gradual process, where lower foundations of understanding will proceed to more complex situations. Specifically, he will determine (1) if the background thermal plasma particles can be accelerated efficiently, (2) how effectively the observations can be explained, and (3) what new testable predictions can be made. The project will support one graduate student, and result in an important understanding of the flare problem, as well as giving useful information about magnetospheric phenomena around the earth, other planets, compact stars, and nuclei of active galaxies.

本项目研究太阳耀斑的能量释放和粒子加速机制。 耀斑能量的来源是载流磁场，大部分能量用于加速粒子，但能量是如何耗散或加速粒子的尚不确定。 直接加热、加速和等离子体波或湍流的产生是可能的耗散通道。 PI将通过将微波，硬X射线和伽马射线观测结果与理论结果进行比较来获得洞察力，这是一个渐进的过程，其中较低的理解基础将继续到更复杂的情况。 具体来说，他将确定（1）背景热等离子体粒子是否可以有效地加速，（2）如何有效地解释观测结果，以及（3）可以做出哪些新的可检验的预测。 该项目将支持一名研究生，并导致对耀斑问题的重要理解，以及提供有关地球周围的磁层现象，其他行星，致密恒星和活动星系核的有用信息。