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: 2329897
• 负责人: Xiaojia Zhang
• 金额: $ 46.96万
• 依托单位: University of Texas at Dallas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-03-01 至 2025-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2329897&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.

地球内部磁层，特别是外部辐射带的动力学，很大程度上受到波粒相互作用的影响，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磁层中。这项工作将研究这一过程，这对于预测太空天气对航天器的影响非常重要，并将为早期职业研究人员和学生提供支持。该奖项的主要目标是研究联合电磁离子回旋加速器。 (EMIC) 和哨声波对地球内部磁层电子动力学的影响 该方法涉及使用范艾伦探测器的 EMIC 和哨声波统计观测、亚暴任务期间事件和宏观尺度相互作用的时间历史以及磁层多尺度。任务航天器将构建新的 EMIC 和哨声波观测经验模型，并根据估计的散射率对所得电子散射率进行分析和数值量化。该奖项反映了 NSF 的法定使命，并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，被认为值得支持。

项目成果

Resonance broadening effect for relativistic electron interaction with electromagnetic ion cyclotron waves

相对论电子与电磁离子回旋波相互作用的共振展宽效应

• DOI: 10.1063/5.0101792
• 发表时间: 2022-08
• 期刊: Physics of Plasmas
• 影响因子: 2.2
• 作者: Tonoian, D. S.;Artemyev, A. V.;Zhang, X. ;Shevelev, M. M.;Vainchtein, D. L.
• 通讯作者: Vainchtein, D. L.

Relativistic Electron Precipitation by EMIC Waves: Importance of Nonlinear Resonant Effects

EMIC 波的相对论性电子沉淀：非线性谐振效应的重要性

• DOI: 10.1029/2022gl099994
• 发表时间: 2022-09
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Grach, Veronika S.;Artemyev, Anton V.;Demekhov, Andrei G.;Zhang, Xiao‐Jia;Bortnik, Jacob;Angelopoulos, Vassilis;Nakamura, Rumi;Tsai, Ethan;Wilkins, Colin;Roberts, Owen W.
• 通讯作者: Roberts, Owen W.

Hot Plasma Effects on Electron Resonant Scattering by Electromagnetic Ion Cyclotron Waves

热等离子体对电磁离子回旋波电子共振散射的影响

• DOI: 10.1029/2022gl099229
• 发表时间: 2022-05-20
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: M. F. Bashir;A. Artemyev;Xiao‐jia Zhang;V. Angelopoulos
• 通讯作者: V. Angelopoulos

Extreme Energy Spectra of Relativistic Electron Flux in the Outer Radiation Belt

外辐射带相对论性电子通量的极限能谱

• DOI: 10.1029/2022ja031038
• 发表时间: 2022-11
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: Mourenas, D.;Artemyev, A. V.;Zhang, X. -j.;Angelopoulos, V.
• 通讯作者: Angelopoulos, V.