Collaborative Research: Quantifying the Effects of Nonlinear Wave-particle Interaction in the Inner Magnetosphere

合作研究：量化内磁层非线性波粒相互作用的影响

• 批准号: 1914670
• 负责人: Oleksiy Agapitov
• 金额: $ 39.31万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1914670&HistoricalAwards=false
• 关键词: Collaborative; Research; Quantifying; Effects; Nonlinear

Whistler waves are radio waves produced at very low frequencies by lightning. They are believed to have an important role in the dynamics of the radiation belts and broader magnetosphere. This work will involve theoretical and observational studies of these waves and their interactions with relativistic particles in the magnetosphere. The results have direct applications in space weather models, which are a priority set out in the National Space Weather Action Plan. Additionally, two graduate students will be supported and collaborations will be strengthened between plasma physicists and space physicists at multiple institutions.To quantify nonlinear wave-particle resonant interactions, three questions will be addressed (i.e., objectives) in this project: (1) how often sufficiently intense whistler waves are detected in the inner magnetosphere, which will provide the occurrence rate of nonlinear wave-particle interactions; (2) how to describe the impact of intense whistler waves on electron flux evolution, which will provide a theoretical tool to evaluate electron distributions in the geospacer system with nonlinear wave-particle interactions; and (3) what is the effect of nonlinear wave-particle interactions on wave generation and damping, which will provide a validated model of the nonlinear wave growth/damping rate in the inner magnetosphere. Each of the three objectives combines observational (from THEMIS and Van Allen Probes) and theoretical investigations.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.

哨声波是闪电产生的低频无线电波。它们被认为在辐射带和更广泛的磁层的动力学中发挥重要作用。这项工作将涉及对这些波及其与磁层中相对论粒子的相互作用进行理论和观测研究。研究结果可直接应用于空间气象模型，这是《国家空间气象行动计划》中规定的一个优先事项。此外，将支持两名研究生，并加强多个机构的等离子体物理学家和空间物理学家之间的合作。为了量化非线性波粒子共振相互作用，将解决三个问题（即，目标）在本项目中：（2）如何描述强哨声波对电子通量演化的影响，这将为评估具有非线性波粒相互作用的地球间隔层系统中电子分布提供理论工具;以及（3）非线性波粒相互作用对波的产生和衰减的影响，这将提供一个验证内磁层非线性波增长/衰减率的模型。这三个目标中的每一个都结合了观测（来自THEMIS和货车艾伦探测器）和理论研究。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估来支持。

项目成果

Direct evidence for magnetic reconnection at the boundaries of magnetic switchbacks with Parker Solar Probe

• DOI: 10.1051/0004-6361/202039806
• 发表时间: 2021-01
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: C. Froment;V. Krasnoselskikh;T. Dudok de Wit;O. Agapitov;N. Fargette;B. Lavraud;A. Larosa;M. Kretzschmar;V. Jagarlamudi;M. Velli;D. Malaspina;P. Whittlesey;S. Bale;A. Case;K. Goetz;J. Kasper;K. Korreck;D. Larson;R. Macdowall;F. Mozer;M. Pulupa;C. Revillet;M. Stevens

Shock Drift Acceleration of Ions in an Interplanetary Shock Observed by MMS

MMS观测的行星际激波中离子的激波漂移加速度

• DOI: 10.3847/2041-8213/ab7761
• 发表时间: 2020
• 期刊: The Astrophysical Journal
• 作者: Hanson, E. L.;Agapitov, O. V.;Vasko, I. Y.;Mozer, F. S.;Krasnoselskikh, V.;Bale, S. D.;Avanov, L.;Khotyaintsev, Y.;Giles, B.
• 通讯作者: Giles, B.

Flux Rope Merging and the Structure of Switchbacks in the Solar Wind

• DOI: 10.3847/1538-4357/ac4016
• 发表时间: 2021-09
• 期刊: The Astrophysical Journal
• 作者: O. Agapitov;J. Drake;M. Swisdak;S. Bale;T. Horbury;J. Kasper;R. Macdowall;F. Mozer;T. Phan;M. Pulupa;N. Raouafi;M. Velli

DC and Low‐Frequency Electric Field Measurements on the Parker Solar Probe

帕克太阳能探测器的直流和低频电场测量

• DOI: 10.1029/2020ja027980
• 发表时间: 2020
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: Mozer, F. S.;Agapitov, O. V.;Bale, S. D.;Bonnell, J. W.;Bowen, T. A.;Vasko, I.
• 通讯作者: Vasko, I.

First Results From the SCM Search‐Coil Magnetometer on Parker Solar Probe

• DOI: 10.1029/2021ja030018
• 发表时间: 2022-03
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: T. Dudok de Wit;V. Krasnoselskikh;O. Agapitov;C. Froment;A. Larosa;S. Bale;T. Bowen;K. Goetz;P. Harvey;G. Jannet;M. Kretzschmar;R. Macdowall;D. Malaspina;P. Martin;B. Page;M. Pulupa;C. Revillet