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Energy Transfer Processes in the Solar Wind: Kinetic scale instabilities and wave-particle interactions in small scale turbulence

太阳风中的能量转移过程：小尺度湍流中的动力学尺度不稳定性和波粒相互作用

基本信息

批准号：
2390202
负责人：
金额：
--
依托单位：
University College London
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2020
资助国家：
英国
起止时间：
2020 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2390202
关键词：
Energy Transfer Processes Solar Wind

项目摘要

The solar wind is a continuous outflow of plasma from the Sun, which expands into the space between the planets in our solar system and forms the heliosphere. The solar wind is inherently turbulent and characterised by instabilities on a range of scales. The Sun also intermittently ejects mass (CME) or energetic particles (SEP) which change their trajectory or energy due to their interactions with the solar wind. When these violent particle events hit the Earth's magnetosphere, they can cause "space-weather" with both long- and short-term impacts on our natural and technological environment. The understanding of the solar wind, as the medium through which space-weather events propagate, and its coupling with the magnetosphere is crucial for the development of successful space-weather prediction and mitigation strategies. This project will investigate the behaviour and the effects of kinetic instabilities in a turbulent plasma with particular emphasis on energy transfer processes. For the investigation of these nonlinear processes, a cross-disciplinary approach combining theoretical analysis, numerical simulations and a variety of observational datasets will be used. This project will utilise the unprecedented observations from ESA's Solar Orbiter spacecraft, launched in February 2020, to advance our understanding of the Sun, the solar wind, and space-weather.

太阳风是从太阳连续流出的等离子体，它扩展到我们太阳系中行星之间的空间，形成日光层。太阳风本质上是湍流的，并以一系列尺度上的不稳定为特征。太阳还间歇性地抛出质量(CME)或高能粒子(SEP)，由于它们与太阳风的相互作用，这些粒子会改变它们的轨道或能量。当这些猛烈的粒子事件撞击地球磁层时，它们可能会对我们的自然和技术环境造成长期和短期的影响，造成“太空天气”。了解太阳风作为空间气象事件传播的媒介及其与磁层的耦合，对于制定成功的空间气象预测和缓解战略至关重要。这个项目将研究湍流等离子体中动力学不稳定性的行为和影响，特别强调能量转移过程。对于这些非线性过程的研究，将使用理论分析、数值模拟和各种观测数据集相结合的跨学科方法。该项目将利用欧空局2020年2月发射的太阳轨道飞行器进行的前所未有的观测，以促进我们对太阳、太阳风和空间天气的了解。