Combined Effects of ElectroMagnetic Ion Cyclotron (EMIC) and Whistler Mode Waves on Relativistic Electron Scattering in the Earth's Inner Magnetosphere

电磁离子回旋加速器 (EMIC) 和惠斯勒模波对地球内磁层相对论性电子散射的综合影响

• 批准号: 2021749
• 负责人: Xiaojia Zhang
• 金额: $ 46.96万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-06-01 至 2023-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2021749&HistoricalAwards=false
• 关键词: Combined; Effects; ElectroMagnetic; Ion; Cyclotron

The dynamics of the Earth’s inner magnetosphere, and particularly the outer radiation belts, are highly affected by wave-particle interactions. In these interactions, certain electromagnetic wave modes can accelerate electrons up to relativistic energies, while other are responsible for relativistic electron precipitation into the atmosphere. The work will investigate this process, which is important for predicting space weather effects on space craft. Early career researchers and students will be supported.The primary objective of this award is to investigate conjoint electronmagnetic ion cyclotron (EMIC) and whistler wave effects on electron dynamics in the Earth's inner magnetosphere. The methodology involves the use of statistical observations of EMIC and whistler waves from the Van Allen Probes, the Time History of Events and Macroscale Interactions during Substorms mission, and Magnetospheric Multiscale Mission spacecraft to construct a new empirical model of EMIC and whistler wave observations and quantify, analytically and numerically, the resultant electron scattering rates. Simulation results, based on the estimated scattering rates, will be validated by comparing with the observed evolution of electron fluxes.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.

地球内磁层的动态，特别是外辐射带，受到波粒相互作用的高度影响。在这些相互作用中，某些电磁波模式可以将电子加速到相对论能量，而其他模式则负责相对论电子沉淀到大气中。这项工作将调查这一过程，这是重要的预测空间天气对航天器的影响。该奖项的主要目的是研究电磁离子回旋加速器（EMIC）和哨声波对地球内磁层电子动力学的影响。该方法涉及使用统计观测的EMIC和哨声波从货车艾伦探测器，时间历史的事件和大尺度相互作用在亚暴使命，磁层多尺度使命航天器，构建一个新的经验模型的EMIC和哨声波观测和量化，分析和数字，所产生的电子散射率。模拟结果的基础上估计的散射率，将通过比较观察到的电子flux.This奖项反映了NSF的法定使命的演变进行验证，并已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

Dependence of Relativistic Electron Precipitation in the Ionosphere on EMIC Wave Minimum Resonant Energy at the Conjugate Equator

• DOI: 10.1029/2021ja029193
• 发表时间: 2021-05
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: X.‐J. Zhang;D. Mourenas;Xiao‐Chen Shen;M. Qin;A. Artemyev;Qianli Ma;Wen Li;Mary Hudson;V. Angelopoulos

Energetic Electron Precipitation Driven by the Combined Effect of ULF, EMIC, and Whistler Waves

• DOI: 10.1029/2021ja029871
• 发表时间: 2022-01-01
• 期刊: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
• 影响因子: 2.8
• 作者: Bashir, M. Fraz;Artemyev, Anton;Angelopoulos, Vassilis
• 通讯作者: Angelopoulos, Vassilis

Fine Structure of Chorus Wave Packets: Comparison Between Observations and Wave Generation Models

• DOI: 10.1029/2021ja029330
• 发表时间: 2021-08
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: X.‐J. Zhang;A. Demekhov;Y. Katoh;D. Nunn;X. Tao;D. Mourenas;Y. Omura;A. Artemyev;V. Angelopoulos

Role of Ducting in Relativistic Electron Loss by Whistler‐Mode Wave Scattering

• DOI: 10.1029/2021ja029851
• 发表时间: 2021-10
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: A. Artemyev;A. Demekhov;X.‐J. Zhang;V. Angelopoulos;D. Mourenas;Y. Fedorenko;J. Maninnen;E. Tsai;C. Wilkins;S. Kasahara;Y. Miyoshi;A. Matsuoka;Y. Kasahara;T. Mitani;Y. Shoichiro;K. Keika;T. Hori;S. Matsuda;S. Nakamura;M. Kitahara;T. Takashima;I. Shinohara

Global Survey of Electron Precipitation due to Hiss Waves in the Earth’s Plasmasphere and Plumes

• DOI: 10.1029/2021ja029644
• 发表时间: 2021-08
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: Q. Ma;Wen Li;X.‐J. Zhang;J. Bortnik;X. Shen;H. Connor;A. Boyd;W. Kurth;G. Hospodarsky;S. Claudepierre;G. Reeves;H. Spence