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Effects of cold electron number density variation on whistler-mode wave growth
Tang, R.; Summers, D.; Deng, X.; Tang, R (reprint author), Nanchang Univ, Inst Space Sci & Technol, Nanchang 330031, Peoples R China.
Department空间科学部
Source PublicationANNALES GEOPHYSICAE
2014
Volume32Issue:7Pages:889-898
ISSN0992-7689
Language英语
KeywordSpace Plasma Physics Wave-particle Interactions
AbstractWe examine how the growth of magnetospheric whistler-mode waves depends on the cold (background) electron number density N-0. The analysis is carried out by varying the cold-plasma parameter a = (electron gyrofrequency)(2)/(electron plasma frequency) 2 which is proportional to 1/N-0. For given values of the thermal anisotropy A(T) and the ratio N-h/N-0, where N-h is the hot (energetic) electron number density, we find that, as N-0 decreases, the maximum values of the linear and nonlinear growth rates decrease and the threshold wave amplitude for nonlinear growth increases. Generally, as N-0 decreases, the region of (N-h/N-0, A(T))-parameter space in which nonlinear wave growth can occur becomes more limited; that is, as N-0 decreases, the parameter region permitting nonlinear wave growth shifts to the top right of (N-h/N-0, A(T)) space characterized by larger N-h/N-0 values and larger A(T) values. The results have implications for choosing input parameters for full-scale particle simulations and also in the analysis of whistler-mode chorus data.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/4478
Collection空间科学部
Corresponding AuthorTang, R (reprint author), Nanchang Univ, Inst Space Sci & Technol, Nanchang 330031, Peoples R China.
Recommended Citation
GB/T 7714
Tang, R.,Summers, D.,Deng, X.,et al. Effects of cold electron number density variation on whistler-mode wave growth[J]. ANNALES GEOPHYSICAE,2014,32(7):889-898.
APA Tang, R.,Summers, D.,Deng, X.,&Tang, R .(2014).Effects of cold electron number density variation on whistler-mode wave growth.ANNALES GEOPHYSICAE,32(7),889-898.
MLA Tang, R.,et al."Effects of cold electron number density variation on whistler-mode wave growth".ANNALES GEOPHYSICAE 32.7(2014):889-898.
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