教師資料查詢 | 類別: 會議論文 | 教師: 汪愷悌 WANG KAITI (瀏覽個人網頁)

標題:On the field line length dependence of variations in anisotropies for pitch angle distributions of keV electrons at dipolarization sites in the tailside
學年106
學期2
發表日期2018/05/20
作品名稱On the field line length dependence of variations in anisotropies for pitch angle distributions of keV electrons at dipolarization sites in the tailside
作品名稱(其他語言)
著者Kaiti Wang; Zhuo-Ren Lang; Ching-Huei Lin; Tohru Hada; Alfred B. C. Chen; Yukitoshi Nishimura
作品所屬單位
出版者
會議名稱JpGU Meeting 2018
會議地點日本 千葉
摘要Previous studies had reported observations from various satellite missions on changes in pitch angle distributions of electrons during dipolarization periods at Earth’s tailside associated with geomagnetic activities. In this study, we quantitatively analyzed the variations in anisotropies for pitch angle distributions of electrons based on observations from 2008 to 2011, by particle instruments ESA and SST onboard the probes of THEMIS mission, at dipolarization sites in the inner plasma sheet. The ratio of this anisotropy during dipolarization to that before dipolarization is found to overall exhibit an increasing trend on its upper limit as the length of field line the probe located increases, specifically for electrons with energies on the order of keV. The effectiveness of Fermi acceleration at different field line length may account for this feature. We will present these results on the aspects of observations as well as theories.
關鍵字pitch angle distributions;dipolarization;THEMIS mission
語言英文
收錄於
會議性質國際
校內研討會地點
研討會時間20180520~20180524
通訊作者Kaiti Wang
國別日本
公開徵稿
出版型式
出處PEM16-25, Abstracts of JpGU Meeting 2018
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