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A new excitation mechanism of H e + band electromagnetic ion cyclotron wave: Hybrid simulation study

文献类型：期刊论文

作者Yao, Jiansheng3,4; Zhao, Yingkui4; Li, Yi3; Chai, Lihui2; Sun, Jicheng1
刊名PHYSICS OF PLASMAS
出版日期2021
卷号28期号:1页码:9
ISSN号1070-664X
DOI10.1063/5.0030265
英文摘要A new excitation mechanism of the H e + band electromagnetic ion cyclotron (EMIC) wave is proposed in this paper. Through 1D hybrid simulation, we find that the frequency of the H + band EMIC wave triggered by anisotropic hot H + drops quickly in the initial stage, and then, a narrow H e + band EMIC wave is excited. Meanwhile, the temperature of ions also changes significantly. Using the linear kinetic theory, we have proved that the temperature variance cannot stimulate the H e + band EMIC wave. Hybrid simulation results show that the distribution of H e + is changed to be X-type during this process. Further investigation confirms that X-type distributed H e + may be caused via the pitch angle scattering by the H + band EMIC wave, which stimulates the H e + band EMIC wave. Beyond that, further research shows that the free energy to excite the H e + band EMIC wave comes from higher energy H e + with a butterfly wing shaped part of X type distribution.
WOS关键词PITCH-ANGLE SCATTERING ; EMIC WAVES ; MAGNETOSPHERE ; O+ ; DISTRIBUTIONS ; INSTABILITY ; GENERATION ; HE+
资助项目National Science Foundation of China[41674177] ; National Science Foundation of China[41874208]
WOS研究方向Physics
语种英语
WOS记录号WOS:000608248100001
出版者AMER INST PHYSICS
资助机构National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/100006]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Zhao, Yingkui
作者单位1.Auburn Univ, Dept Phys, Auburn, AL 36849 USA
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
3.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Geospace Environm, Hefei 230026, Peoples R China
4.Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China
推荐引用方式
GB/T 7714		 Yao, Jiansheng,Zhao, Yingkui,Li, Yi,et al. A new excitation mechanism of H e + band electromagnetic ion cyclotron wave: Hybrid simulation study[J]. PHYSICS OF PLASMAS,2021,28(1):9.
APA Yao, Jiansheng,Zhao, Yingkui,Li, Yi,Chai, Lihui,&Sun, Jicheng.(2021).A new excitation mechanism of H e + band electromagnetic ion cyclotron wave: Hybrid simulation study.PHYSICS OF PLASMAS,28(1),9.
MLA Yao, Jiansheng,et al."A new excitation mechanism of H e + band electromagnetic ion cyclotron wave: Hybrid simulation study".PHYSICS OF PLASMAS 28.1(2021):9.

入库方式： OAI收割

来源：地质与地球物理研究所

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