Collaborative Research: Intermittent Turbulence Study of Space Plasmas Using ROMA and DSRG

合作研究：使用 ROMA 和 DSRG 进行空间等离子体间歇湍流研究

• 批准号: 0940685
• 负责人: Tom Chang
• 金额: $ 15.01万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-12-01 至 2015-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0940685&HistoricalAwards=false
• 关键词: Collaborative; Research; Intermittent; Turbulence; Study

The project will examine the nature of plasma fluctuations in various regions of the magnetosphere using a new analytical method called rank-ordered multifractal analysis (ROMA). The goal is to understand the nonlinear stochastic behavior of space plasmas and in particular the phenomenon known as intermittent turbulence. In parallel with the analytical analysis, the project will use a combination of numerical and theoretical modeling called the Direct Simulation Renormalization Group (DSRG), which is a dynamical invariant theory appropriate for the quantitative study of crossover behavior of multifractals. Results from the theoretical and numerical analyses will be compared with observations obtained from satellite missions.The analytical and numerical techniques that will be further developed by this project have the potential to not only provide a transformative view of plasma phenomena in Earth's magnetosphere, but have the potential to be widely used in the analysis of a wide array of phenomena beyond plasma physics.

该项目将使用一种新的分析方法来研究磁层不同区域的等离子体波动的性质，这种新的分析方法称为有序多重分形分析(ROMA)。目标是了解空间等离子体的非线性随机行为，特别是被称为间歇性湍流的现象。在分析分析的同时，该项目将使用数值和理论模型的组合，称为直接模拟重整化群(DSRG)，这是一种适用于定量研究多重分形交叉行为的动力学不变量理论。理论和数值分析的结果将与卫星飞行获得的观测结果进行比较。该项目将进一步开发的分析和数值技术不仅有可能对地球磁层中的等离子体现象提供变革性的看法，而且有可能广泛用于分析等离子体物理以外的一系列现象。