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.

一系列行星际研究，包括高能粒子加速和调制，都受到行星际湍流谱不完整或误导性理解的阻碍。 在这方面，这个为期3年的SHINE项目的主要目的是更深入地了解在整个行星际光谱中分配能量的非线性动力学，以及使用太阳风作为风洞来询问与磁流体动力学（MHD）湍流有关的基本物理问题。 因此，该项目的主要目标是提供对MHD湍流的更好理解，总的来说，为该项目成果在其他空间等离子体中的未来应用奠定基础。 该项目将支持新罕布什尔大学的一名本科生，并将促进强有力的国际合作，以促进美国和全球的空间天气研究。这个为期3年的SHINE项目旨在继续项目团队关于湍流第三矩理论的富有成效和成功的研究。 太阳风湍流的三阶矩理论提供了一个工具，它是高度独立的模型，可以作为基准的建模。 研究人员将继续扩大该领域的研究，包括风洞数据、能量级联的各向异性、0.3至1 Au之间的湍流、间歇结构、剪切流、下游激波区的湍流以及膨胀效应。 该项目与NSF的SHINE计划直接相关，因为它将提供有关空间湍流和天体物理等离子体性质的重要知识。 这类知识对于准确建模和预测从太阳表面到地球及其以外的空间气象条件至关重要。 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。