学术讲座公告--- Local time distributions of repetition periods for whistler-mode rising-tone chorus

  • 发布时间:[2017-06-22] 来源:[学院] 点击量:[4298]

报告时间:2017年6月26日(周一)下午15:00 
报告地点:学院303会议室 
报告题目:Local time distributions of repetition periods for whistler-mode rising-tone chorus
报告人:Prof. Jih-Hong Shue
报告主题简介:
Whistler mode chorus waves generally occur outside the plasmapause in the magnetosphere. The most striking feature of the waves is their occurrence in discrete elements. One of the parameters that describe the discrete elements is the repetition period (Trp), the time between consecutive elements. The Trp has not been studied statistically before. We use high-resolution waveform data to derive distributions
of Trp for different local times. We find that the average Trp for the nightside (0.56 s) and dawnside (0.53 s) are smaller than those for the dayside (0.81 s) and duskside (0.97s). Through a comparison with the background plasma and magnetic fields, we also find that the total magnetic field and temperature are the main controlling factors that affect the variability of Trp. These results are important for understanding the generation mechanism of chorus and choosing parameters in simulations that model the acceleration and loss of electrons by wave-particle interactions.

 报告人简介:
許志浤 (Jih-Hong Shue) 簡歷
‧1989-1993年 美國 阿拉斯加大學博士 –Ionospheric Convection
‧1993-1996年 台灣 中央大學博士後 –Magnetopause
‧1996-1999年 日本 名古屋大學講師 –Auroral Electrojets
‧1999-2003年 美國 霍普金斯大學研究員 –Auroral Emission
‧2003年 台灣 中央大學副教授(2007年 晋升為教授)–Magnetopause, Auroral Electrojets, Auroral Emission –Foreshock Waves, Chorus and EMIC Waves, Plasmapause

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