CAREER: Understanding the Role of Inductive Electric Fields in Particle Energization

职业：了解感应电场在粒子能量化中的作用

• 批准号: 1945573
• 负责人: Raluca Ilie
• 金额: $ 77.4万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-02-01 至 2025-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1945573&HistoricalAwards=false
• 关键词: CAREER; Understanding; Role; Inductive; Electric

The space environment surrounding Earth is filled with plasma flowing among magnetic and electric fields. Particles in this plasma interact with these fields, gaining energy that affects their motion and interactions throughout this region of space, known as the magnetosphere. The understanding of plasmas embedded in magnetic fields, the goal of this project, has many scientific, industrial, national security, and medical applications - including direct relevance to space weather modeling and forecasting. The project will support research for an early career female researcher, graduate student, post-doctoral researcher, and four undergraduate students each year. Additionally, 3D visualizations of abstract electricity and magnetism concepts will be made in Virtual Reality - an immersive, exploratory, and engaging environment. The visualizations will be used for physics curricula aimed towards undergraduate engineering, science, mathematics, and medical students and high school students. The primary objective of this project is to fill the gap in our understanding of particle accelerations in the terrestrial magnetosphere and determine how the nature and structure of the electric field contributes to energization and particle transport in this region. Specifically, the goal is to understand how particle injections are formed and driven by different sources of electric field (potential vs. inductive) and where they originate from. To do this, the work includes (1) determining the role of inductive electric fields to ring current particle energization leading to understanding of the injection driver mechanism; (2) determining and quantifying the role of inductive electric fields due to intensification of the magnetopause current vs inductive electric fields due to magnetic field dipolarizations to ring current development and decay; and (3) determining the role of inductive electric fields in predicting geomagnetic activity. This involves detailed numerical computer simulations and data-model comparisons with in-situ measurements from NASA's Magnetosphere Multiscale (MMS) and Van Allen Probes missions.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

地球周围的太空环境充满了在磁场和电场之间流动的等离子体。等离子体中的粒子与这些场相互作用，获得能量，影响它们在整个空间区域（称为磁层）的运动和相互作用。该项目的目标是了解磁场中嵌入的等离子体，它具有许多科学、工业、国家安全和医疗应用--包括与空间天气建模和预测直接相关。该项目每年将支持一名职业早期女性研究员、研究生、博士后研究员和四名本科生的研究。此外，抽象的电和磁概念的3D可视化将在虚拟现实中进行-一个沉浸式，探索性和参与性的环境。可视化将用于针对本科工程，科学，数学和医学学生和高中学生的物理课程。本项目的主要目标是填补我们对地球磁层中粒子加速的理解中的差距，并确定电场的性质和结构如何对该区域的粒子运动和粒子输运做出贡献。具体来说，目标是了解粒子注入是如何形成的，并由不同的电场源（电势与电感）驱动，以及它们来自何处。为了做到这一点，工作包括：（1）确定感应电场对环电流粒子扰动的作用，从而理解注入驱动器机制;（2）确定和量化由于磁层顶电流增强引起的感应电场与由于磁场偶极引起的感应电场对环电流发展和衰减的作用;（3）确定感应电场在预测地磁活动中的作用。这包括详细的数值计算机模拟和数据模型与NASA的磁层多尺度（MMS）和货车艾伦探测器任务的现场测量结果的比较。该奖项反映了NSF的法定使命，并被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。

项目成果

Virtual Reality Laboratory Experiences for Electricity and Magnetism Courses

电学和磁学课程的虚拟现实实验室体验

• 发表时间: 2021
• 期刊: 2021 ASEE Virtual Annual Conference Content Access
• 作者: Ilie, R.

The Effects of Inductive Electric Field on the Spatial and Temporal Evolution of the Inner Magnetospheric Ring Current

感应电场对内磁层环流时空演化的影响

• DOI: 10.1029/2020ja028554
• 发表时间: 2021
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: Liu, Jianghuai;Ilie, Raluca
• 通讯作者: Ilie, Raluca

A Brief Review of the Ring Current and Outstanding Problems

• DOI: 10.1002/9781119815624.ch20
• 发表时间: 2021-04
• 作者: R. Ilie;M. F. Bashir;E. Kronberg