Quantification of Radial Diffusion in Energizing MeV (Millions of Electron Volts) Electrons in the Magnetosphere

磁层中激发 MeV(数百万电子伏)电子的径向扩散的量化

基本信息

  • 批准号:
    0549093
  • 负责人:
  • 金额:
    $ 24.44万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2006
  • 资助国家:
    美国
  • 起止时间:
    2006-04-15 至 2010-03-31
  • 项目状态:
    已结题

项目摘要

An important objective of magnetospheric research is the understanding and eventual accurate prediction of the variability of energetic particles in the radiation belts. Electrons in the energy range of a few hundred thousands of electron volts (keV) to a few millions of electron volts (MeV) can have deleterious effects on spacecraft electronics through radiation damage and deep dielectric charging. Though significant progress has been made in predicting MeV electrons at and inside geosynchronous orbit using the radial diffusion model, the quantitative contribution of different physical mechanisms governing the variability of these electrons are still unclear. Previous radial diffusion models have assumed a source population at the outer boundary of the radiation belt, but it has been difficult to confirm the validity of this assumption due to limited observations. This uncertainty also raises the question of the validity of the radial diffusion coefficients and loss rates used. This project will eliminate this uncertainty by using actual measurements of electrons as the source population. This will be accomplished by using data from Los Alamos National Laboratory (LANL) sensors at geosynchronous orbit. The goal is to quantify the contribution of radial diffusion to the acceleration of MeV electrons inside geosynchronous orbit. The project will incorporate realistic loss rates into the diffusion model by using data from the SAMPEX and Polar satellites. The model results inside geosynchronous orbit will be compared to Polar measurements. This comparison will make it possible to determine how much enhancement of MeV electrons can be attributed to radial diffusion. A significant portion of the research will be carried out by a graduate student under the direction of the Principal Investigator.
磁层研究的一个重要目标是了解并最终准确预测辐射带高能粒子的变化。能量范围在几十万电子伏到几百万电子伏之间的电子会通过辐射损伤和深层电介质充电对航天器电子设备产生有害影响。虽然在使用径向扩散模型预测地球同步轨道上和轨道内MeV电子方面取得了重大进展,但控制这些电子可变性的不同物理机制的定量贡献仍然不清楚。以往的径向扩散模式都假设辐射带的外边界有一个源种群,但由于观测资料有限,很难证实这一假设的正确性。这种不确定性也提出了径向扩散系数和损失率的有效性的问题。这个项目将通过使用电子的实际测量作为源群来消除这种不确定性。这将通过使用位于地球同步轨道的洛斯阿拉莫斯国家实验室(LANL)传感器的数据来实现。目标是量化径向扩散对地球同步轨道内MeV电子加速的贡献。该项目将利用SAMPEX和Polar卫星提供的数据,将实际损失率纳入扩散模型。地球同步轨道内的模型结果将与极地测量结果进行比较。这种比较将使我们有可能确定有多少MeV电子的增强可以归因于径向扩散。研究的很大一部分将由一名研究生在主要研究者的指导下进行。

项目成果

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Xinlin Li其他文献

Bounded anisotropy fluid model for ion temperature evolution applied to AMPTE/IRM magnetosheath data
离子温度演化的有界各向异性流体模型应用于 AMPTE/IRM 磁鞘数据
  • DOI:
  • 发表时间:
    1995
  • 期刊:
  • 影响因子:
    0
  • 作者:
    R. Denton;Xinlin Li;T. Phan
  • 通讯作者:
    T. Phan
Parametric study of shock‐induced transport and energization of relativistic electrons in the magnetosphere
磁层中冲击引起的相对论电子输运和赋能的参数研究
  • DOI:
    10.1029/2004ja010679
  • 发表时间:
    2005
  • 期刊:
  • 影响因子:
    0
  • 作者:
    J. Gannon;Xinlin Li;M. Temerin
  • 通讯作者:
    M. Temerin
Accuracy and time efficiency of deep learning-based three-dimensional crown segmentation on intraoral scanning: a systematic review and meta-analysis
口腔内扫描中基于深度学习的三维牙冠分割的准确性和时间效率:一项系统综述和荟萃分析
  • DOI:
    10.1016/j.jdent.2025.105842
  • 发表时间:
    2025-08-01
  • 期刊:
  • 影响因子:
    5.500
  • 作者:
    Mengfei Xu;Xinlin Li;Lingyun Wang;Jingyi Yu;Deshui Li;Xiaoyu Chi;Fulan Wei
  • 通讯作者:
    Fulan Wei
Study on the bonding strength and thermal shock resistance of thermal barrier coatings regulated by interface texture
界面织构调控的热障涂层结合强度及抗热震性能研究
  • DOI:
    10.1016/j.surfcoat.2025.132342
  • 发表时间:
    2025-09-15
  • 期刊:
  • 影响因子:
    6.100
  • 作者:
    Yongzhi Jing;Xiufang Cui;Guo Jin;Zhuo Chen;Yongchao Fang;Chong Zhang;Xinlin Li;Cheng Qin
  • 通讯作者:
    Cheng Qin
Flower-like microstructures of Co@MoSsub2/sub@N-RGO: A promising platform for solar-driven water splitting through engineering 1T phase MoSsub2/sub and N-RGO integration
Co@MoS₂@N-RGO 的花状微观结构:通过工程 1T 相 MoS₂ 和 N-RGO 集成实现太阳能驱动水分解的有前途的平台
  • DOI:
    10.1016/j.electacta.2025.146115
  • 发表时间:
    2025-06-10
  • 期刊:
  • 影响因子:
    5.600
  • 作者:
    Dieudonne Tanue Nde;Haripriya Vadapalli;Nipa Roy;Raja Venkatesan;Xinlin Li;Adel El-Marghany;Sai Kumar Arla;Vijaya Kumar Naidu Boya;Sang Woo Joo
  • 通讯作者:
    Sang Woo Joo

Xinlin Li的其他文献

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{{ truncateString('Xinlin Li', 18)}}的其他基金

RAPID: Refurbishing and Integrating the Relativistic Electron and Proton Telescope integrated little experiment-2 (REPTile-2) into Emirates Mission to the Asteroid Belt (EMA)
RAPID:翻新和集成相对论电子和质子望远镜将小型实验 2 (REPTile-2) 集成到阿联酋小行星带任务 (EMA) 中
  • 批准号:
    2342473
  • 财政年份:
    2023
  • 资助金额:
    $ 24.44万
  • 项目类别:
    Standard Grant
On the Source and Loss of Inner Belt Electrons
内带电子的来源与损失
  • 批准号:
    1834971
  • 财政年份:
    2019
  • 资助金额:
    $ 24.44万
  • 项目类别:
    Standard Grant
Analysis and Modeling of the Data from CubeSat: Colorado Student Space Weather Experiment (CSSWE)
CubeSat 数据的分析和建模:科罗拉多州学生空间天气实验 (CSSWE)
  • 批准号:
    1443749
  • 财政年份:
    2015
  • 资助金额:
    $ 24.44万
  • 项目类别:
    Continuing Grant
Collaborative Research: NSWP--Machine Learning and Data Assimilation for Real-Time Radiation Belt Forecasting
合作研究:NSWP--用于实时辐射带预报的机器学习和数据同化
  • 批准号:
    1131869
  • 财政年份:
    2011
  • 资助金额:
    $ 24.44万
  • 项目类别:
    Continuing Grant
CubeSat: Colorado Student Space Weather Experiment
CubeSat:科罗拉多州学生太空天气实验
  • 批准号:
    0940277
  • 财政年份:
    2010
  • 资助金额:
    $ 24.44万
  • 项目类别:
    Continuing Grant
Acceleration of Radiation Belt Electrons: In Situ Heating vs. Inward Radial Transport
辐射带电子的加速:原位加热与向内径向传输
  • 批准号:
    0842388
  • 财政年份:
    2009
  • 资助金额:
    $ 24.44万
  • 项目类别:
    Continuing Grant
GEM: Phase Space Density Gradient of Energetic Electrons at Geosynchronous Orbit During Sharp Solar Wind Pressure Enhancements
GEM:太阳风压急剧增强期间地球同步轨道上高能电子的相空间密度梯度
  • 批准号:
    0902813
  • 财政年份:
    2009
  • 资助金额:
    $ 24.44万
  • 项目类别:
    Standard Grant
NSWP: Quantitative Forecast and Specification of Radiation Belt Electrons
NSWP:辐射带电子的定量预测和规范
  • 批准号:
    0519207
  • 财政年份:
    2005
  • 资助金额:
    $ 24.44万
  • 项目类别:
    Continuing Grant
Source of Radiation Belt Electrons
辐射带电子源
  • 批准号:
    0233302
  • 财政年份:
    2003
  • 资助金额:
    $ 24.44万
  • 项目类别:
    Continuing Grant
GEM: Detailed Study of the Magnetic Storms Selected for GEM Inner Magnetosphere and Storms Campaign
GEM:对 GEM 内磁层和风暴活动选定的磁暴进行详细研究
  • 批准号:
    0101351
  • 财政年份:
    2001
  • 资助金额:
    $ 24.44万
  • 项目类别:
    Continuing Grant

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Plexin-A3在放射状胶质细胞体易位和胼胝体形成中的作用
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