Kinetic, Alfven wave driven by the density inhomogeneity in the presence of loss-cone distribution function-particle aspect analysis
文献类型：期刊论文
| 作者 | Duan SP(段素平) ; Li, Z. Y. ; Liu ZX(刘振兴) |
| 刊名 | Planetary and Space Science
 |
| 出版日期 | 2005 |
| 卷号 | 53期号:11页码:1167-1173 |
| ISSN号 | 0032-0633 |
| 关键词 | kinetic Alfven wave loss-cone distribution function auroral region plasmas growth rate of instabilities drift wave instability field ion plasma |
| 通讯作者 | 北京8701信箱 |
| 英文摘要 | Kinetic Alfven waves (KAWs) driven by the diamagnetic drift instability that is excited by the density inhomogeneity in low-beta plasmas, such as plasmas in the auroral region, are investigated by adopting the particle aspect analysis and loss-cone distribution function. The results obtained in this paper indicate that the propagation and evolution of kinetic Alfven waves decrease and the kinetic Alfven wave excitation becomes not easier with increasing loss-cone index J. But the spatial scales of the perpendicular perturbation driving kinetic Alfven waves have a decreasing tendency with the larger values of J, which perhaps is in relation with the decreasing width of loss-cone. A single hump appears in the plots of the growth rate of the instability when J = 2. But the hump cannot emerge when J = 0 or J = 1. The density inhomogeneity of ions plays an important role in driving KAWs and it cannot be ignored. KAWs can be easier driven and KAWs can propagate and evolve faster with the increasing level of density inhomogeneity. However, the range of the perpendicular wave number of the wave instability decreases, namely, the longer the scale of perpendicular disturbance the easier the excitation of KAW. As the density inhomogeneity increases, the tendency of numerical solutions of the dispersion relation is similar to that obtained by the kinetic theory and Maxwellian distribution function (Duan and Li, 2004). But the profiles of the plots of numerical solutions are different. This means that the velocity distribution function of particles is important for KAW driven in magnetoplasmas, especially in the active regions of the magnetosphere, such as auroral region, and plasma sheet boundary. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI |
| 原文出处 | http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6V6T-4GP7PBJ-1-5F&_cdi=5823&_user=1999492&_orig=search&_coverDate=09%2F30%2F2005&_sk=999469988&view=c&wchp=dGLzVtz-zSkWz&md5=50f6d51053e2d35595639e5d60286609&ie=/sdarticle.pdf |
| 语种 | 英语 |
| 源URL | [http://ir.cssar.ac.cn/handle/122/1032]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Duan SP,Li, Z. Y.,Liu ZX. Kinetic, Alfven wave driven by the density inhomogeneity in the presence of loss-cone distribution function-particle aspect analysis[J]. Planetary and Space Science,2005,53(11):1167-1173. |
| APA | 段素平,Li, Z. Y.,&刘振兴.(2005).Kinetic, Alfven wave driven by the density inhomogeneity in the presence of loss-cone distribution function-particle aspect analysis.Planetary and Space Science,53(11),1167-1173. |
| MLA | 段素平,et al."Kinetic, Alfven wave driven by the density inhomogeneity in the presence of loss-cone distribution function-particle aspect analysis".Planetary and Space Science 53.11(2005):1167-1173. |
入库方式： OAI收割
来源：国家空间科学中心
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