淡江大學機構典藏:Item 987654321/117674
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    题名: Study on Interactions Between Electrons and Observed Whistler-mode Waves at Dipolarization Sites in the Inner Plasma Sheet
    作者: Wang Kaiti;Fumiko Otsuka;Tohru Hada;Ching-Huei Lin
    关键词: dipolarization;electrons;whisler-mode waves
    日期: 2019-07-28
    上传时间: 2019-10-24 12:13:11 (UTC+8)
    摘要: Dipolarization of geomagnetic fields had been found to occur at tailside during geomagnetic activities associated with decreasing in AL index and substorms. Based on data analysis from electric field instrument and search coil magnetometer onboard of THEMIS mission, whistler-mode waves are found at dipolarization sites near the magnetic equator around 10 RE (Earth radii) in the inner plasma sheet. Meanwhile, the electron fluxes and their pitch angle distributions are also found to vary during dipolarization period. Therefore, we study the interaction between electrons and these waves from the perspective of test particle simulation. The observed wave frequencies, amplitudes, and wave angles as well as the electron energies are adopted to implement the simulation. Observations of parameters of the waves and electrons, as well as the preliminary simulation results of changes in energies and pitch angles of electrons at different energies will be presented. We anticipate the results will be beneficial to understand the role these observed whistler-mode waves play during dipolarization periods at tailside.
    關聯: AOGS 2019 Program Abstracts
    显示于类别:[航空太空工程學系暨研究所] 會議論文

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