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DOI | 10.1002/2017GL075843 |
The Effects of Hydrogen Band EMIC Waves on Ring Current H+ Ions | |
Wang, Zhiqiang1,2,3; Zhai, Hao1; Gao, Zhuxiu4 | |
2017-12-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:23 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Hydrogen band electromagnetic ion cyclotron (EMIC) waves have received much attention recently because they are found to frequently span larger spatial areas than the other band EMIC waves. Using test particle simulations, we study the nonlinear effects of hydrogen band EMIC waves on ring current H+ ions. A dimensionless parameter R is used to characterize the competition between wave-induced and adiabatic motions. The results indicate that there are three regimes of wave-particle interactions for typical 35 keV H+ ions at L = 5: diffusive (quasi-linear) behavior when alpha(eq) <= 35 degrees (R >= 2.45), the nonlinear phase trapping when 35 degrees < alpha(eq) < 50 degrees (0.75 < R < 2.45), and both the nonlinear phase bunching and phase trapping when alpha(eq) >= 50 degrees (R <= 0.75). The phase trapping can transport H+ ions toward large pitch angle, while the phase bunching has the opposite effect. The phase-trapped H+ ions can be significantly accelerated (from 35 keV to over 500 keV) in about 4 min and thus contribute to the formation of high energy components of ring current ions. The results suggest that the effect of hydrogen band EMIC waves is not ignorable in the nonlinear acceleration and resonance scattering of ring current H+ ions. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419102400004 |
WOS关键词 | VAN ALLEN PROBES ; COMET GRIGG-SKJELLERUP ; NONLINEAR-INTERACTIONS ; INNER MAGNETOSPHERE ; CRRES OBSERVATIONS ; CYCLOTRON WAVES ; NEWBORN IONS ; ELECTRONS ; PLASMAPAUSE ; INSTABILITY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27521 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Aeronaut & Astronaut, Coll Astronaut, Dept Space Sci & Applicat, Nanjing, Jiangsu, Peoples R China; 2.Chinese Acad Sci, State Key Lab Space Weather, Beijing, Peoples R China; 3.Changsha Univ Sci & Technol, Hunan Prov Higher Educ Key Lab Modeling & Monitor, Changsha, Hunan, Peoples R China; 4.China Acad Launch Vehicle Technol, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Zhiqiang,Zhai, Hao,Gao, Zhuxiu. The Effects of Hydrogen Band EMIC Waves on Ring Current H+ Ions[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(23). |
APA | Wang, Zhiqiang,Zhai, Hao,&Gao, Zhuxiu.(2017).The Effects of Hydrogen Band EMIC Waves on Ring Current H+ Ions.GEOPHYSICAL RESEARCH LETTERS,44(23). |
MLA | Wang, Zhiqiang,et al."The Effects of Hydrogen Band EMIC Waves on Ring Current H+ Ions".GEOPHYSICAL RESEARCH LETTERS 44.23(2017). |
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