Collaborative Research: Causes and Consequences of Relativistic Electron Precipitation as Revealed by the CubeSat Mission ELFIN’s Pitch-Angle Resolved Loss Cone Measurements

合作研究：立方体卫星任务 ELFIN 的俯仰角解析损耗锥测量揭示的相对论电子沉淀的原因和后果

• 批准号: 2019914
• 负责人: Vassilis Angelopoulos
• 金额: $ 38.76万
• 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: 2020-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2019914&HistoricalAwards=false
• 关键词: Collaborative; Research; Causes; Consequences; Relativistic

The jointly funded NSF/NASA ELFIN mission consists of two identical CubeSats on a polar (~ 93 degree inclination), nearly circular, low-Earth orbit. ELFIN was launched on September 15, 2018 and is currently operating within the geospace environment. This funding will address the prime mission objective of analyzing the data currently being collected by ELFIN to advance understanding of wave-particle interactions and their effect on relativistic electrons in the outer radiation belt. Two undergraduate students, a graduate student, and three early career scientists will be supported. ELFIN data products are integrated into courses at UCLA and in public outreach events in the Los Angeles area.The project will utilize ELFIN, together with its conjunctions with other, equatorial Heliophysics missions to address the efficacy of EMIC wave precipitation, and the relative contribution of EMIC, whistlers and kinetic Alfvén waves in the observed relativistic electron scattering (100s of keV to a few MeV energy). The specific science objectives are: (1) Are EMIC waves responsible for 0.5-2MeV electron precipitation?(2) Are waves other than EMIC waves (principally chorus waves and kinetic Alfvén waves (KAWs)), also responsible for significant relativistic electron scattering? (3) What are the typical precipitation rates associated with various wave types as function of geomagnetic conditions?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.

NSF/NASA 联合资助的 ELFIN 任务由两个相同的立方体卫星组成，ELFIN 于 2018 年 9 月 15 日在极地（约 93 度倾角）近地轨道上发射，目前正在地球空间环境中运行。两名本科生将解决分析 ELFIN 当前收集的数据的主要任务目标，以增进对波粒相互作用及其对外辐射带相对论电子的影响的理解。学生、研究生和三名早期职业科学家将获得支持，将 ELFIN 数据产品纳入加州大学洛杉矶分校的课程和洛杉矶地区的公共宣传活动中。该项目将利用 ELFIN 及其与其他赤道太阳物理学的结合。任务旨在解决 EMIC 波降水的功效，以及 EMIC、啸声和动能阿尔文波在观测到的相对论电子散射（100 keV 到几 MeV）中的相对贡献具体的科学目标是：(1) EMIC 波是否造成 0.5-2MeV 电子沉淀？(2) EMIC 波以外的波（主要是合唱波和动能阿尔文波 (KAW)）是否也造成显着的相对论性。 (3) 与地磁条件函数相关的各种波类型的典型降水率是多少？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。

项目成果

Energetic Electron Precipitation Driven by Electromagnetic Ion Cyclotron Waves from ELFIN’s Low Altitude Perspective

从 ELFIN 低空视角看电磁离子回旋波驱动的高能电子沉淀

• DOI: 10.1007/s11214-023-00984-w
• 发表时间: 2023
• 期刊: Space Science Reviews
• 影响因子: 10.3
• 作者: Angelopoulos, V.;Zhang, X. -j.;Artemyev, A. V.;Mourenas, D.;Tsai, E.;Wilkins, C.;Runov, A.;Liu, J.;Turner, D. L.;Li, W.;Khurana, K.;Wirz, R. E.;Sergeev, V. A.;Meng, X.;Wu, J.;Hartinger, M. D.;Raita, T.;Shen, Y.;An, X.;Shi, X.;Bashir, M. F.;Shen, X.;Gan, L.;Qin, M.;Capannolo, L.;Ma, Q.;Russell, C. L.;Masongsong, E. V.;Caron, R.;He, I.;Iglesias, L.;Jha, S.;King, J.;Kumar, S.;Le, K.;Mao, J.;McDermott, A.;Nguyen, K.;Norris, A.;Palla, A.;Roosnovo, A.;Tam, J.;Xie, E.;Yap, R. C.;Ye, S.;Young, C.;Adair, L. A.;Shaffer, C.;Chung, M.;Cruce, P.;Lawson, M.;Leneman, D.;Allen, M.;Anderson, M.;Arreola-Zamora, M.;Artinger, J.;Asher, J.;Branchevsky, D.;Cliffe, M.;Colton, K.;Costello, C.;Depe, D.;Domae, B. W.;Eldin, S.;Fitzgibbon, L.;Flemming, A.;Frederick, D. M.;Gilbert, A.;Hesford, B.;Krieger, R.;Lian, K.;McKinney, E.;Miller, J. P.;Pedersen, C.;Qu, Z.;Rozario, R.;Rubly, M.;Seaton, R.;Subramanian, A.;Sundin, S. R.;Tan, A.;Thomlinson, D.;Turner, W.;Wing, G.;Wong, C.;Zarifian, A.
• 通讯作者: Zarifian, A.

Thinning of the Magnetotail Current Sheet Inferred From Low‐Altitude Observations of Energetic Electrons

从低空高能电子观测推断磁尾电流片变薄

• DOI: 10.1029/2022ja030705
• 发表时间: 2022-09-27
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: A. Artemyev;V. Angelopoulos;X.‐J. Zhang;A. Runov;A. Petrukovich;R. Nakamura;E. Tsai;C. Wilkins
• 通讯作者: C. Wilkins

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

管道在惠斯勒模式波散射相对论性电子损耗中的作用

• DOI: 10.1029/2021ja029851
• 发表时间: 2021-11
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: Artemyev, A. V.;Demekhov, A. G.;Zhang, X. ‐J.;Angelopoulos, V.;Mourenas, D.;Fedorenko, Yu V.;Maninnen, J.;Tsai, E.;Wilkins, C.;Kasahara, S.;et al
• 通讯作者: et al

Inner Belt Wisp Precipitation Measured by ELFIN: Regimes of Energetic Electron Scattering by VLF Transmitter Waves

ELFIN 测量的内带缕状降水：VLF 发射机波的高能电子散射状况

• DOI: 10.1029/2022ja030968
• 发表时间: 2022-11-01
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: Yangyang Shen;A. Artemyev;Q. Ma;Xiao‐jia Zhang;D. Mourenas;E. Tsai;C. Wilkins;Jiashu Wu;V.
• 通讯作者: V.

On the Role of Whistler‐Mode Waves in Electron Interaction With Dipolarizing Flux Bundles

关于惠斯勒模式波在电子与偶极通量束相互作用中的作用

• DOI: 10.1029/2022ja030265
• 发表时间: 2022-04
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: Artemyev, A. V.;Neishtadt, A. I.;Angelopoulos, V.
• 通讯作者: Angelopoulos, V.