EXCITATION OF KINETIC ALFVEN WAVES BY DENSITY STRIATION IN MAGNETO-PLASMAS
文献类型：期刊论文
| 作者 | Wu, D. J.; Chen, L.
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2013-07-01 |
| 卷号 | 771期号:1页码:112PP |
| ISSN号 | 0004-637X |
| 关键词 | instabilities magnetic fields plasmas Sun: corona waves |
| 通讯作者 | Wu, DJ (reprint author), Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China. Email: clvslc214@pmo.ac.cn |
| 英文摘要 | Field-aligned density striation is one of the most common inhomogeneity phenomena in magneto-plasmas, such as in the solar coronal plasma and terrestrial auroral plasma. Kinetic Alfven waves (KAWs) can play an important role in the inhomogeneous heating of coronal magneto-plasmas as well as in the local acceleration of auroral energetic electrons. In this paper, we study the dispersion and instability of KAWs in a magneto-plasma with density striation structures. Results show that KAWs become unstable in the presence of the density striation and the corresponding instability has a maximal growth rate at the perpendicular wavelength close to the spatial scale of the density gradient. Related experimental phenomena in both laboratory and space plasmas are discussed. It is suggested that the excitation of KAWs by the density striation of magneto-plasmas can be of potential importance in understanding the physics of the formation of magneto-plasma filaments and their heating mechanisms, which are often present in the terrestrial auroral plasma, the solar coronal plasma, and other astrophysical plasmas. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SOLAR CORONAL LOOPS ; MAGNETOHYDRODYNAMIC TURBULENCE ; ASTROPHYSICAL GYROKINETICS ; NONLINEAR-INTERACTION ; HOSE INSTABILITY ; FINE-STRUCTURE ; BETA PLASMAS ; HEAVY-IONS ; FIELDS ; DISSIPATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000321274200003 |
| 公开日期 | 2014-01-08 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/9871]  |
| 专题 | 紫金山天文台_太阳和太阳系等离子体研究团组 |
| 作者单位 | Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, D. J.,Chen, L.. EXCITATION OF KINETIC ALFVEN WAVES BY DENSITY STRIATION IN MAGNETO-PLASMAS[J]. ASTROPHYSICAL JOURNAL,2013,771(1):112PP. |
| APA | Wu, D. J.,&Chen, L..(2013).EXCITATION OF KINETIC ALFVEN WAVES BY DENSITY STRIATION IN MAGNETO-PLASMAS.ASTROPHYSICAL JOURNAL,771(1),112PP. |
| MLA | Wu, D. J.,et al."EXCITATION OF KINETIC ALFVEN WAVES BY DENSITY STRIATION IN MAGNETO-PLASMAS".ASTROPHYSICAL JOURNAL 771.1(2013):112PP. |
入库方式： OAI收割
来源：紫金山天文台
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