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题名: Dispersion Equation of Low-Frequency Waves Driven by Temperature Anisotropy
作者: Chen Ling(陈玲)1; Wu DeJin(吴德金)1
刊名: PLASMA SCIENCE & TECHNOLOGY
出版日期: 2012-10-01
卷号: 14, 期号:10, 页码:880-885
关键词: dispersion equation ; low-frequency waves ; temperature anisotropy
DOI: 10.1088/1009-0630/14/10/05
文章类型: Article
英文摘要: The 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.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Physics, Fluids & Plasmas
研究领域[WOS]: Physics
关键词[WOS]: FIRE-HOSE ; INSTABILITY ; PLASMAS
收录类别: SCI
语种: 英语
WOS记录号: WOS:000310547000005
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15536
Appears in Collections:太阳和太阳系等离子体研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
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