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Pitch angle scattering of relativistic electrons near electromagnetic ion cyclotron resonances in diverging magnetic fields

B Eliasson, K Papadopoulos2017年Plasma Physics and Controlled FusionIF 2.2出版社

A theoretical study of the propagation of left-hand polarized shear Alfvén waves in spatially decreasing magnetic field geometries near the EMIC resonance, including the spectrum and amplitude of the mode converted EMIC waves and the pitch angle scattering of relativistic electrons transiting the resonant region, is presented. The objective of the paper is to motivate an experimental study of the subject using the UCLA LAPD chamber. The results are relevant in exploring the possibility that shear Alfvén waves strategically injected into the radiation belts using either ionospheric heating from ground based RF transmitters or injected by transmitters based on space platforms can enhance the precipitation rate of trapped relativistic electrons. Effects of multi-ionic composition are also investigated.

日本語訳

左旋偏波シアー・アルフヴェン波の、EMIC共鳴付近における空間的に減少する磁場構造中での伝播に関する理論的研究を提示する。これには、モード変換されたEMIC波のスペクトルと振幅、および共鳴領域を通過する相対論的電子のピッチ角散乱が含まれる。本論文の目的は、UCLA LAPD装置を用いた実験的研究を動機付けることである。これらの結果は、地上ベースのRF送信機を用いた電離圏加熱、あるいは宇宙プラットフォームに搭載された送信機によって戦略的に注入されたシアー・アルフヴェン波が、捕捉された相対論的電子の降下速度を増強できる可能性を探る上で関連する。多イオン組成の影響についても調査する。

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Cyclotron resonanceRelativistic electronIon cyclotron resonance
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