SHINE: Using the Solar Wind as a Turbulence Laboratory to Investigate the Role of Intermittency and Shear

SHINE：利用太阳风作为湍流实验室来研究间歇性和切变的作用

• 批准号: 1622413
• 负责人: Charles Smith
• 金额: $ 37.06万
• 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: 2016
• 资助国家: 美国
• 起止时间: 2016-07-01 至 2021-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1622413&HistoricalAwards=false
• 关键词: SHINE; Using; Solar; Wind; Turbulence

A range of interplanetary studies, including energetic particle acceleration and modulation, are hindered by an incomplete, or misleading understanding of the spectrum of interplanetary turbulence. In this regard, the main purpose of this 3-year SHINE project is to gain a deeper understanding of the nonlinear dynamics that distribute energy throughout the interplanetary spectrum, and the use of the solar wind as a wind tunnel to ask fundamental physics questions pertaining to magnetohydrodynamic (MHD) turbulence. Thus, the main goal of the project is to provide an improved understanding of MHD turbulence, in general, seeding the future application of the project results to other space plasmas. The project will support an undergraduate student at the UNH, and it will promote strong international collaborations for the benefit of advancing space weather research both in the USA and worldwide.This 3-year SHINE project is aimed at continuing the productive and successful research of the project team on the third-moment theory of the turbulence. The third-moment theory of the turbulence in the solar wind provides a tool, which is highly model-independent and can serve as benchmark for modelers. The investigators will continue to expand their research in this area by including wind tunnel data, the anisotropy of the energy-cascade, turbulence between 0.3 and 1 AU, intermittent structures, shear flows, turbulence in downstream shock regions, and expansion effects. The project is directly relevant to the NSF's SHINE program, because it will provide important knowledge about the nature of turbulence in space and astrophysical plasmas. Such knowledge is critical for accurate modeling and prediction of the space weather conditions from the solar surface to the Earth and beyond. The research and EPO agenda of this project supports the Strategic Goals of the AGS Division in discovery, learning, diversity, and interdisciplinary research.

一系列的星际研究，包括能量颗粒的加速和调制，受到对行星际湍流频谱的不完全理解的阻碍。 在这方面，这个为期三年的光泽项目的主要目的是对在整个星际频谱中分散能量的非线性动力学，以及将太阳风用作风洞的非线性动力学，以提出与磁氢动力学（MHD）涡轮的基本物理问题。 因此，该项目的主要目标是提供对MHD湍流的改进，通常将项目结果的未来应用播种到其他空间等离子体中。 该项目将支持UNH的一名本科生，并将促进强大的国际合作，以促进美国和全球的太空天气研究。这三年的Shine项目旨在继续对项目团队进行第三阶段性湍流理论的富有成效和成功的研究。 太阳风中湍流的第三矩理论提供了一种工具，该工具是高度独立的，可以作为建模者的基准。 研究人员将继续通过包括风洞数据，能量表面的各向异性，0.3和1 AU之间的湍流，间歇性结构，剪切流，下游冲击区域的湍流以及扩张效应来继续扩展其在这一领域的研究。 该项目与NSF的Shine计划直接相关，因为它将提供有关太空和天体物理等离子体中湍流性质的重要知识。 这种知识对于从太阳能表面到地球及以后的太空天气条件进行准确建模和预测至关重要。 该项目的研究和EPO议程支持AGS部门在发现，学习，多样性和跨学科研究方面的战略目标。