Study of Relativistic Electron Beam Propagation in the Atmosphere-Ionosphere-Magnetosphere
Study of Relativistic Electron Beam Propagation in the Atmosphere-Ionosphere-Magnetosphere
复制标题
大气-电离层-磁层中相对论性电子束传播研究
DOI：
10.21236/ada402969
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发表时间：
2001
期刊：
影响因子：
3.7
通讯作者：
T. Neubert
中科院分区：
文献类型：
--
作者：
B. Gilchrist;G. Khazanov;L. Krause;T. Neubert
摘要：已经为相对论性 (E(-) 1-100 MeV）电子束的空基注入开发了传播物理和相关电离层/大气层修改的模型。已经对电离层、磁层和大气中的光束传播效应进行了初步评估。这项工作的总体目标是开发计算工具，并利用它们更好地评估相对论光束的发射、传播以及与空间环境和大气的相互作用。计算工具的开发并应用于解决这个问题。包括模型解决：使用包络方程的光束传播；集成光束-大气相互作用（该模型包含计算光发射作为高度函数所需的时间相关化学效应）；使用细胞内粒子 (PIC) 技术进行光束发射和传播；以及磁层传播和等离子体传输（哈扎诺夫模型）。结论是，对于实际的光束能量和电流，光束传播是稳定的。这是在理论上并使用 PIC 建模完成的。在长距离传播时，哈扎诺夫模型能够表明，光束粒子将以俯仰角和相对位置散射，但寿命预计与近赤道镜像注入的辐射带的寿命相似。
Abstract : Models for propagation physics and associated ionospheric/atmospheric modification have been developed for the space-based injection of relativistic (E(-) 1-100 MeV) electron beams. Initial evaluations of beam propagation effects in the ionosphere, magnetosphere, and atmosphere have been conducted. The overall goal of this work was to develop computational tools and use them to better assess relavistic beam launch, propagation, and interaction with the space environment and atmosphere. Computational tools developed and then applied to this problem. include models addressing: beam propagation using an envelope equation; integrated beam-atmosphere interactions (This model contains time-dependent chemistry effects necessary to compute optical emissions as a function of altitude); beam launch and propagation using particle-in-cell (PIC) techniques; and magnetospheric propagation and plasma transport (Khazanov models). It is concluded that for practical beam energies and current the beam propagation is stable This is done theoretically and using the PIC modeling. Over long distance propagation the Khazanov models were able to show that the beam particles will scatter in pitch-angle and relative location, but lifetimes are expected to be similar to those found for the radiation belts for nearly equatorial mirroring injection.