Anomalous Difusion in the Collisionless Solar Wind Plasma

无碰撞太阳风等离子体中的异常扩散

• 批准号: 0904007
• 负责人: Jakobus Le Roux
• 金额: $ 43.82万
• 依托单位: University of Alabama in Huntsville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0904007&HistoricalAwards=false
• 关键词: Anomalous; Difusion; Collisionless; Solar; Wind

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).The Principal Investigator (PI) will investigate the anomalous diffusion of energetic charged particles in fusion, space, and astrophysical plasmas using a combination of theory, simulations, and observations. He intends to focus on the role of non-classical (non-Gaussian) phenomena in anomalous diffusion in the collisionless solar wind, specifically the magnetic field-line random walk of energetic charged particles in the solar wind. In this investigation, the PI will develop and test theories for the non-classical magnetic field-line random walk and energetic charged particle diffusive transport, including a numerical kinetic transport model to solve the standard cosmic ray equation (modified to include fractional derivative terms for non-classical anomalous diffusion). The PI will recruit and supervise a graduate student to work on a Ph.D. thesis as part of this project, and he will encourage minority graduate students to apply. The PI plans to include this graduate student as an integral participant in the analysis of non-Gaussian anomalous transport of energetic charged particles at collisionless shocks. In this way, the project will link research and education and contribute to the training of the next generation of space plasma physicists.

该奖项根据 2009 年美国复苏和再投资法案（公法 111-5）提供资金。首席研究员 (PI) 将结合理论、模拟和观察来研究聚变、空间和天体物理等离子体中高能带电粒子的异常扩散。他打算重点研究非经典（非高斯）现象在无碰撞太阳风中的异常扩散中的作用，特别是太阳风中高能带电粒子的磁场线随机游走。在这项研究中，PI将开发和测试非经典磁场线随机游走和高能带电粒子扩散输运的理论，包括求解标准宇宙射线方程的数值动力学输运模型（修改为包括非经典反常扩散的分数阶导数项）。 PI 将招募并监督一名研究生攻读博士学位。论文作为该项目的一部分，他将鼓励少数民族研究生申请。 PI 计划让这位研究生作为不可或缺的参与者来分析无碰撞冲击下高能带电粒子的非高斯异常输运。通过这种方式，该项目将把研究和教育联系起来，并有助于培养下一代空间等离子体物理学家。