Studies on acceleration mechanisms of relativistic electrons in theEarth's outer radiation belt with observations and simulations

地球外辐射带相对论电子加速机制的观测与模拟研究

• 批准号: 22540458
• 负责人: NAGAI Tsugunobu
• 金额: $ 2.58万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22540458/
• 关键词: 太陽地球システム; 宇宙天気; 放射線帯; サブストーム; 高エネルギー電子; 磁気嵐; 地球放射線帯

The spacecraft Akebono has made observations of relativistic electrons in the Earth’s radiation belts with the radiation monitor (RDM). The observations by Akebono have revealed rapid rebuilding of the core part (around L = 4) of the electron outer belt with a time scale of less than a few hours during the Dst minimum period for several storms. Simulations for formation of the outer radiation belt are attempted. A simulation in which the magnetic field and electric field are deduced from the global MHD model under realistic solar wind conditions is carried out. This model can successfully simulate a rapid rebuilding of the outer radiation belt with the observed time scale.

Akebono航天器利用辐射监测器（RDM）对地球辐射带中的相对论电子进行了观测。Akebono的观测表明，在Dst极小期的几个风暴中，电子外带的核心部分（L = 4附近）在不到几个小时的时间尺度内迅速重建。试图模拟外辐射带的形成。在实际太阳风条件下，利用全球MHD模型进行了磁场和电场的模拟。该模式可以成功地模拟出外辐射带在观测时间尺度上的快速重建。

项目成果

Recent developments in the radiation belt environment model

• DOI: 10.1016/j.jastp.2010.09.033
• 发表时间: 2011-07
• 期刊: Journal of Atmospheric and Solar-Terrestrial Physics
• 影响因子: 1.9
• 作者: M. Fok;A. Glocer;Q. Zheng;Q. Zheng;R. Horne;N. Meredith;J. Albert;T. Nagai

太陽活動2周期にわたる放射線帯の変動

太阳活动两个周期内辐射带的波动

• 发表时间: 2010
• 作者: 長井嗣信;浅井佳子
• 通讯作者: 浅井佳子

Rebuilding process of the outer electron radiation belt: The spacecraft Akebono observations, Dynamics of the Earth's Radiation Belts and Inner Magnetosphere

外电子辐射带重建过程：曙光号航天器观测、地球辐射带与内磁层动力学

• 发表时间: 2012
• 期刊: Geophysical Monograph Series
• 作者: Nagai;T.
• 通讯作者: T.

Rapid rebuilding of the outer radiation belt

• DOI: 10.1029/2011ja016516
• 发表时间: 2011-09
• 期刊: Journal of Geophysical Research
• 作者: A. Glocer;M. Fok;T. Nagai;G. Tóth;T. Guild;J. Blake