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The generation and evolution of multi-band EMIC waves in the magnetosphere: Hybrid simulations
Guo, Jun; Guo, Jun (guoj2005@163.com)
Department空间科学部
Source PublicationAdvances in Space Research
2016
Volume58Issue:11Pages:2460-2468
ISSN0273-1177
Language英语
AbstractElectromagnetic ion cyclotron (EMIC) waves have played an important role in loss and acceleration of charged particles in the magnetosphere. In this paper, with a 1-D hybrid simulation model, we have studied the generation and evolution of multi-band EMIC waves in a homogenous multi-ion (protons and helium ions) plasma, where the waves are excited by the anisotropic hot protons, and the effects of the anisotropy of hot protons, concentration, and temperature of helium ions on the excited EMIC wave spectrum are considered. In the early phase of the cyclotron instability, the multi-band EMIC waves with a clear stop band around the helium ion gyrofrequency are preferentially generated under the condition of a lower anisotropy of hot protons, smaller concentration of helium ions, and colder helium ions, which is consistent with the linear theory. What's more, it is found that both the frequencies and wave numbers of EMIC waves will decrease with time, which is then proved to be a quasi-linear process caused by the decrease of anisotropy of hot protons. Meanwhile, the standing density structures will be generated in the system, which is due to the coupling between counter-propagating EMIC waves. Our simulations suggest that the linear theory should be valid to describe both generation and evolution of EMIC waves in the Earth's magnetosphere. © 2016 COSPAR
Indexed BySCI ; EI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/5635
Collection空间科学部
Corresponding AuthorGuo, Jun (guoj2005@163.com)
Recommended Citation
GB/T 7714
Guo, Jun,Guo, Jun . The generation and evolution of multi-band EMIC waves in the magnetosphere: Hybrid simulations[J]. Advances in Space Research,2016,58(11):2460-2468.
APA Guo, Jun,&Guo, Jun .(2016).The generation and evolution of multi-band EMIC waves in the magnetosphere: Hybrid simulations.Advances in Space Research,58(11),2460-2468.
MLA Guo, Jun,et al."The generation and evolution of multi-band EMIC waves in the magnetosphere: Hybrid simulations".Advances in Space Research 58.11(2016):2460-2468.
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