Electron Acceleration, Transport and Loss in Planetary Radiation Belts

行星辐射带中的电子加速、传输和损失

• 批准号: ST/M00130X/1
• 负责人: Richard Horne
• 金额: $ 50.93万
• 依托单位: British Antarctic Survey
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FM00130X%2F1
• 关键词: Electron; Acceleration; Transport; Loss; Planetary

How electrons are accelerated and lost inside planetary and astrophysical magnetic fields are major unresolved questions. At Earth there has been a major advance: that intense electromagnetic waves at frequencies of a few kiloHertz can accelerate electrons up to relativistic energies via cyclotron resonant wave-particle interactions. This result has transformed generally accepted ideas on the Earth's radiation belts that have lasted 40 years or more, and has spurred new satellite missions such as NASA's Van Allen Probes mission and the Japanese ERG mission to test this and related ideas. Intense electromagnetic waves are also observed inside the magnetic fields of Jupiter and Saturn which suggests that the same resonant acceleration and loss processes that occur at Earth could be important for all planetary radiation belts. The goal of this proposal is to test the hypothesis that cyclotron resonant wave-particle interactions are major electron acceleration and loss processes at Earth, Jupiter and Saturn, and play a major role in the formation of radiation belts at these planets. The results of our research will help determine whether electron cyclotron resonant acceleration and loss processes are universal processes that are more widely applicable to the Sun and other astrophysical objects. It will help set new research goals for future spacecraft missions to the planets, provide research training for young scientists, develop computer models for space weather that will be of direct use to the space insurance, satellite construction, and satellite service industries, and leave a legacy of understanding that will last long after the completion of the project.

电子如何在行星和天体物理磁场中加速和丢失是尚未解决的主要问题。在地球上有一个重大的进步：频率为几千赫兹的强电磁波可以通过回旋共振波-粒子相互作用将电子加速到相对论能量。这一结果改变了持续了40年或更长时间的关于地球辐射带的普遍接受的想法，并刺激了新的卫星任务，如美国宇航局的货车艾伦探测器使命和日本ERG使命，以测试这一点和相关的想法。在木星和土星的磁场中也观察到强烈的电磁波，这表明在地球上发生的相同的共振加速和损失过程可能对所有行星辐射带都很重要。这个提议的目的是检验一个假设，即回旋共振波粒相互作用是地球、木星和土星的主要电子加速和损失过程，并在这些行星辐射带的形成中发挥重要作用。我们的研究结果将有助于确定电子回旋加速器共振加速和损失过程是否是更广泛适用于太阳和其他天体的普遍过程。它将有助于为未来的行星航天器任务设定新的研究目标，为年轻科学家提供研究培训，开发空间天气的计算机模型，这些模型将直接用于空间保险，卫星建造和卫星服务行业，并留下在项目完成后将持续很长时间的理解遗产。

项目成果

Characterization of Jupiter's secondary auroral oval and its response to hot plasma injections

木星次级极光卵圆的特征及其对热等离子体注入的响应

• DOI: 10.1002/2017ja024214
• 发表时间: 2017
• 期刊: Space Physics
• 作者: Gray R

Propagation and linear mode conversion of magnetosonic and electromagnetic ion cyclotron waves in the radiation belts

• DOI: 10.1002/2016gl070216
• 发表时间: 2016-10
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: R. Horne;Y. Miyoshi

Rapid Electron Acceleration in Low-Density Regions of Saturn's Radiation Belt by Whistler Mode Chorus Waves.

惠斯勒模式合唱波在土星辐射带低密度区域的快速电子加速。

• DOI: 10.1029/2019gl083071
• 发表时间: 2019
• 期刊: Geophysical research letters
• 影响因子: 5.2
• 作者: Woodfield EE

Survey of whistler mode chorus intensity at Jupiter

• DOI: 10.1002/2016ja022969
• 发表时间: 2016-10
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: J. Menietti;J. Groene;T. Averkamp;R. Horne;E. Woodfield;Y. Shprits;M. Pich;D. Gurnett

Interactions between energetic electrons and realistic whistler mode waves in the Jovian magnetosphere

• DOI: 10.1002/2017ja023975
• 发表时间: 2017-05
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: M. Soria-Santacruz;Y. Shprits;A. Drozdov;J. Menietti;H. Garrett;H. Zhu;A. Kellerman;R. Horne