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Dispersion Equation of Low-Frequency Waves Driven by Temperature Anisotropy
Chen Ling; Wu Dejin
AbstractThe plasma temperature (or the kinetic pressure) anisotropy is an intrinsic characteristic of a collisionless magnetized plasma. In this paper, based on the two-fluid model, a dispersion equation of low-frequency (omega << omega(ci), omega(ci) the ion gyrofrequency) waves, including the plasma temperature anisotropy effect, is presented. We investigate the properties of low-frequency waves when the parallel temperature exceeds the perpendicular temperature, and especially their dependence on the propagation angle, pressure anisotropy, and energy closures. The results show that both the instable Alfven and slow modes are purely growing. The growth rate of the Alfven wave is not affected by the propagation angle or energy closures, while that of the slow wave depends sensitively on the propagation angle and energy closures as well as pressure anisotropy. The fast wave is always stable. We also show how to elaborate the symbolic calculation of the dispersion equation performed using Mathematica Notebook.
KeywordDispersion Equation Low-frequency Waves Temperature Anisotropy
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaPhysics
WOS SubjectPhysics, Fluids & Plasmas
WOS IDWOS:000310547000005
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Document Type期刊论文
AffiliationChinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Chen Ling,Wu Dejin. Dispersion Equation of Low-Frequency Waves Driven by Temperature Anisotropy[J]. PLASMA SCIENCE & TECHNOLOGY,2012,14(10):880-885.
APA Chen Ling,&Wu Dejin.(2012).Dispersion Equation of Low-Frequency Waves Driven by Temperature Anisotropy.PLASMA SCIENCE & TECHNOLOGY,14(10),880-885.
MLA Chen Ling,et al."Dispersion Equation of Low-Frequency Waves Driven by Temperature Anisotropy".PLASMA SCIENCE & TECHNOLOGY 14.10(2012):880-885.
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