Reproducing Ultra-Relativistic Electron Acceleration Using a Coupled Density and Radiation Belt Model

IF 2.6 2区地球科学 Q2 ASTRONOMY & ASTROPHYSICS

Journal of Geophysical Research: Space Physics Pub Date : 2024-12-17 DOI:10.1029/2024JA032971

T. A. Daggitt, R. B. Horne, S. A. Glauert, G. Del Zanna

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Abstract

The cold plasma density can significantly alter the rate of diffusion of radiation belt electrons by chorus waves within the magnetosphere, and the range of energies at which diffusion is effective. We describe a coupled density and radiation belt model based on the British Antarctic Survey Radiation Belt Model that uses spatially and temporally varying values of $f_{p e} / f_{c e}$ to drive a statistical model of electron diffusion due to chorus waves. We demonstrate that this approach of including the variance in $f_{p e} / f_{c e}$ recreates the acceleration of electrons up to MeV energies better than other previous approaches to including $f_{p e} / f_{c e}$ .

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冷等离子体密度会显著改变磁层内合唱波对辐射带电子的扩散速度，以及有效扩散的能量范围。我们描述了一个基于英国南极勘测局辐射带模型的密度和辐射带耦合模型，该模型使用空间和时间变化的 f p e / f c e ${f}_{pe}/{f}_{ce}$ 值来驱动合波引起的电子扩散统计模型。我们证明，这种包含 f p e / f c e ${f}_{pe}/{f}_{ce}$ 差异的方法比以前其他包含 f p e / f c e ${f}_{pe}/{f}_{ce}$ 的方法更好地再现了高达 MeV 能量的电子加速。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Geophysical Research: Space Physics Earth and Planetary Sciences-Geophysics

CiteScore

5.30

自引率

35.70%

发文量

570