Modeling the Quasi‐Trapped Electron Fluxes From Cosmic Ray Albedo Neutron Decay (CRAND)
Modeling the Quasi‐Trapped Electron Fluxes From Cosmic Ray Albedo Neutron Decay (CRAND)
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DOI：
10.1029/2018gl081730
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发表时间：
2019-02
影响因子：
5.2
通讯作者：
Z. Xiang;Xinlin Li;R. Selesnick;M. Temerin;B. Ni;Hong Zhao;Kun Zhang;L. Khoo
中科院分区：
文献类型：
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作者：
Z. Xiang;Xinlin Li;R. Selesnick;M. Temerin;B. Ni;Hong Zhao;Kun Zhang;L. Khoo
近年来，宇宙线中子衰变（CRAND）已被确认为内辐射带内缘测得的相对论电子的主要来源。在这里，我们介绍了一个漂移源模型，包括方位角漂移和CRAND电子源，以模拟DEMETER卫星在2010年4月20日至30日期间测量的准陷阱电子分布。模拟的内辐射带内边缘准俘获电子通量的经度分布成功地再现了DEMETER的观测结果，证实了CRAND是这些电子的主要来源。此外，模拟和观察之间准俘获相对论电子的能谱和L分布的比较进一步表明，CRAND可能是L < 2和L ≈ 3时300-700 keV准俘获电子的主要来源。
Recently, cosmic ray albedo neutron decay (CRAND) has been identified as the main source of relativistic electrons measured at the inner edge of inner radiation belt. Here we introduce a drift‐source model that includes azimuthal drift and a CRAND electron source to simulate the quasi‐trapped electron distribution measured by the DEMETER satellite during 20–30 April 2010. The simulated longitude distribution of quasi‐trapped electron fluxes at the inner edge of inner radiation belt successfully reproduces the DEMETER observations, confirming CRAND as the main source for these electrons. Furthermore, a comparison of the energy spectrum and the L distribution of the quasi‐trapped relativistic electrons between simulations and observations further suggests that CRAND is likely the dominant source for 300–700‐keV quasi‐trapped electrons at L < 2 and L ≈ 3.