CAREER: Understanding and Modeling the Mysterious Dropout of Radiation Belt Electrons
职业:理解辐射带电子的神秘消失并对其进行建模
基本信息
- 批准号:1752736
- 负责人:
- 金额:$ 65.77万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-05-15 至 2025-04-30
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
This project focuses modeling of the relativistic electron population dynamics in Earth's Radiation Belts. Without fully understanding the mysterious dropout of electrons, a full understanding and prediction of radiation belt dynamics cannot be reached. This is of considerable practical importance due to the hazards to space-borne systems. Many communications satellites and national security assets reside in this radiation environment and their lifetime depends on its dynamics. Advancing the science supports improvement of the predictive models and fits directly into the goals of the National Space Weather Strategy and Action Plan, which was released in 2015. The project supports a female faculty member and will train and educate graduate and undergraduate students in both research and outreach activities. The learning module will provide an unprecedented informal learning opportunity on space science to West Virginia K-12 schools. It is expected to increase the awareness and interest of middle school students in the STEM programs in the state, and inspire them to pursue STEM careers, especially the underrepresented female and lower socioeconomic status students. The opportunities to develop and deliver the learning module will also provide valuable educational and outreach experience for undergraduate and graduate students and enhance their science literacy and communication skills.Since the launch of NASA Van Allen Probes in 2012, significant progress has been achieved in understanding the strong enhancement of relativistic electrons. However, the fast and dramatic dropout of radiation belt electrons (orders of magnitudes in a few hours) remains unsolved. The open question exists: Where do the electrons go during the dropout? This award is to develop a new and comprehensive dropout model, named Relativistic Electron Dropout (RED), with physical and event-specific inputs to simulate the electron dropout and understand the governing processes. RED will include not only the traditional loss processes (pitch angle diffusion, magnetopause shadowing, and outward radial diffusion), but also the new mechanism called Drift Orbit Bifurcation (DOB). Physical quantification of these processes will be achieved based on realistic field and particle conditions. With these inputs, RED will simulate both the electron dropout observed at high altitudes and the electron precipitation observed at low altitudes to resolve the governing mechanisms. The wealth of energetic electron and wave measurements from Van Allen Probes, THEMIS, and MMS spacecraft that cover the region from the outer belt to the magnetopause and the multiple POES satellites at low altitudes will provide an excellent test base for the RED model. This model will be the first to incorporate all the major loss mechanisms during the dropout, including the new DOB process. It is capable of simulating both electron dropout at high altitudes and precipitation at low altitudes, which will make a significant contribution in understanding the governing processes during the dropout and resolving their relative importance. The physical and event-specific quantification of the magnetopause shadowing, DOB, and radial diffusion processes is new and critical for understanding the fast electron dropout as well as the overall radiation belt dynamics.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.
本计画主要研究地球辐射带中相对论性电子布居动力学之模拟。如果不完全理解电子的神秘脱落,就无法完全理解和预测辐射带的动力学。由于对空间系统的危害,这具有相当大的实际重要性。许多通信卫星和国家安全资产都位于这种辐射环境中,其寿命取决于其动态。推进科学支持预测模型的改进,并直接符合2015年发布的国家空间天气战略和行动计划的目标。该项目支持一名女教员,并将在研究和外联活动方面对研究生和本科生进行培训和教育。学习单元将为西弗吉尼亚州K-12学校提供前所未有的空间科学非正式学习机会。预计这将提高该州中学生对STEM项目的认识和兴趣,并激励他们追求STEM职业,特别是代表性不足的女性和社会经济地位较低的学生。开发和提供学习模块的机会还将为本科生和研究生提供宝贵的教育和推广经验,并提高他们的科学素养和沟通技能。自2012年NASA货车艾伦探测器发射以来,在理解相对论电子的强增强方面取得了重大进展。然而,辐射带电子的快速和戏剧性的脱落(在几个小时内的数量级)仍然没有解决。存在一个悬而未决的问题:在脱落过程中,电子去了哪里?该奖项旨在开发一个新的全面的辍学模型,名为相对论电子辍学(RED),具有物理和特定事件的输入,以模拟电子辍学并了解管理过程。RED将不仅包括传统的损失过程(俯仰角扩散,磁层顶遮蔽和向外径向扩散),而且还包括称为漂移轨道分叉(DOB)的新机制。这些过程的物理量化将根据实际的场和粒子条件来实现。通过这些输入,RED将模拟在高海拔观察到的电子脱落和在低海拔观察到的电子沉淀,以解决控制机制。覆盖从外带到磁层顶区域的货车艾伦探测器、THEMIS和MMS航天器以及低空多颗POES卫星提供的丰富高能电子和波测量数据将为RED模型提供出色的测试基地。该模型将是第一个在辍学期间纳入所有主要损失机制的模型,包括新的DOB过程。它能够模拟高海拔的电子脱落和低海拔的降水,这将有助于理解脱落过程中的控制过程,并解决它们的相对重要性。磁层顶遮蔽、DOB和径向扩散过程的物理和事件特定量化是新的,对于理解快速电子脱落以及整体辐射带动态至关重要。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智力价值和更广泛的影响审查标准进行评估来支持。
项目成果
期刊论文数量(17)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Estimating the Azimuthal Mode Structure of ULF Waves Based on Multiple GOES Satellite Observations
- DOI:10.1029/2019ja026927
- 发表时间:2018-12
- 期刊:
- 影响因子:0
- 作者:M. Barani;W. Tu;T. Sarris;K. Pham;R. Redmon
- 通讯作者:M. Barani;W. Tu;T. Sarris;K. Pham;R. Redmon
Quantifying event‐specific radial diffusion coefficients of radiation belt electrons with the PPMLR‐MHD simulation
使用 PPMLR–MHD 模拟量化辐射带电子的事件–特定径向扩散系数
- DOI:10.1029/2019ja027634
- 发表时间:2020
- 期刊:
- 影响因子:0
- 作者:Li‐Fang Li;Weichao Tu;Lei Dai;Bin‐Bin Tang;Chi Wang;Mohammad Barani;Gang Zeng;Chao Wei;J.L. Burch
- 通讯作者:J.L. Burch
Modeling the Dynamics of Energetic Protons in Earth's Inner Magnetosphere
- DOI:10.1029/2021ja030153
- 发表时间:2022-03
- 期刊:
- 影响因子:0
- 作者:X. Lyu;W. Tu
- 通讯作者:X. Lyu;W. Tu
Modeling the Simultaneous Dropout of Energetic Electrons and Protons by Magnetopause Shadowing
- DOI:10.1029/2023gl106681
- 发表时间:2024-01
- 期刊:
- 影响因子:5.2
- 作者:X. Lyu;Weichao Tu;Jinbei Huang;Qianli Ma;Zhi‐Gu Li
- 通讯作者:X. Lyu;Weichao Tu;Jinbei Huang;Qianli Ma;Zhi‐Gu Li
Modeling the Effects of Drift Orbit Bifurcation on Radiation Belt Electrons
模拟漂移轨道分岔对辐射带电子的影响
- DOI:10.1029/2022ja030827
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Huang, Jinbei;Tu, Weichao;Eshetu, W. W.
- 通讯作者:Eshetu, W. W.
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Weichao Tu其他文献
Retraction Note: IMP3 accelerates the progression of prostate cancer through inhibiting PTEN expression in a SMURF1-dependent way
- DOI:
10.1186/s13046-023-02599-z - 发表时间:
2023-01-17 - 期刊:
- 影响因子:12.800
- 作者:
Xiang Zhang;Dawei Wang;Boke Liu;Xingwei Jin;Xianjin Wang;Junwei Pan;Weichao Tu;Yuan Shao - 通讯作者:
Yuan Shao
Quantifying event‐specific radial diffusion coefficients of radiation belt electrons with the PPMLR‐MHD simulation
- DOI:
https://doi.org/10.1029/2019JA027634 - 发表时间:
2020 - 期刊:
- 影响因子:
- 作者:
Li‐Fang Li;Weichao Tu;Lei Dai;Bin‐Bin Tang;Chi Wang;Mohammad Barani;Gang Zeng;Chao Wei;J.L. Burch - 通讯作者:
J.L. Burch
RETRACTED ARTICLE: IMP3 accelerates the progression of prostate cancer through inhibiting PTEN expression in a SMURF1-dependent way
- DOI:
10.1186/s13046-020-01657-0 - 发表时间:
2020-09-16 - 期刊:
- 影响因子:12.800
- 作者:
Xiang Zhang;Dawei Wang;Boke Liu;Xingwei Jin;Xianjin Wang;Junwei Pan;Weichao Tu;Yuan Shao - 通讯作者:
Yuan Shao
Weichao Tu的其他文献
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{{ truncateString('Weichao Tu', 18)}}的其他基金
Collaborative Research: GEM--Quantifying the Contribution of Off-Equatorial Ultra-Low Frequency (ULF) Waves on Radial Diffusion in the Radiation Belts
合作研究:GEM——量化离赤道超低频(ULF)波对辐射带径向扩散的贡献
- 批准号:
2247856 - 财政年份:2023
- 资助金额:
$ 65.77万 - 项目类别:
Standard Grant
GEM: Study the Precipitation of Radiation Belt Electrons during the Rapid Dropout Events
GEM:研究快速丢失事件期间辐射带电子的沉淀
- 批准号:
1613081 - 财政年份:2015
- 资助金额:
$ 65.77万 - 项目类别:
Continuing Grant
GEM: Study the Precipitation of Radiation Belt Electrons during the Rapid Dropout Events
GEM:研究快速丢失事件期间辐射带电子的沉淀
- 批准号:
1402194 - 财政年份:2014
- 资助金额:
$ 65.77万 - 项目类别:
Continuing Grant
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