Solitary kinetic Alfven waves in dusty plasmas
文献类型：期刊论文
| 作者 | Li, Yang-fang1,2; Wu, D. J.1; Morfill, G. E.2 |
| 刊名 | PHYSICS OF PLASMAS
 |
| 出版日期 | 2008-08-01 |
| 卷号 | 15期号:8页码:083703 |
| 关键词 | Solitary kinetic Alfven waves in dusty plasmas are studied by Considering the dust charge variation. The effect of the dust charge-to-mass ratio on the soliton solution is discussed. The Sagdeev potential is derived analytically with constant dust charge and then calculated numerically by taking the dust charge variation into account. We show that the dust charge-to-mass ratio plays an important role in the soliton properties. The soliton solutions are comprised of two branches. One branch is sub-Alfvenic and the soliton velocity is obviously smaller than the Alfven speed. The other branch is super-Alfvenic and the soliton velocity is very close to or greater than the Alfven speed. Both compressive and rarefactive solitons can exist. For the sub-Alfvenic branch the rarefactive soliton is bell-shaped and it is much narrower than the compressive one. However for the super-Alfvenic branch the compressive soliton is bell-shaped and narrower and the rarefactive one is broadened. When the charge-to-mass ratio of the dust grains is sufficiently high the width of the rarefactive soliton in the super-Alfvenic branch will broaden extremely and a electron depletion will be observed. It is also shown that the bell-shaped soliton can transition to a cusped structure when the velocity is sufficiently high. (C) 2008 American Institute of Physics. |
| ISSN号 | 1070-664X |
| 英文摘要 | Solitary kinetic Alfven waves in dusty plasmas are studied by Considering the dust charge variation. The effect of the dust charge-to-mass ratio on the soliton solution is discussed. The Sagdeev potential is derived analytically with constant dust charge and then calculated numerically by taking the dust charge variation into account. We show that the dust charge-to-mass ratio plays an important role in the soliton properties. The soliton solutions are comprised of two branches. One branch is sub-Alfvenic and the soliton velocity is obviously smaller than the Alfven speed. The other branch is super-Alfvenic and the soliton velocity is very close to or greater than the Alfven speed. Both compressive and rarefactive solitons can exist. For the sub-Alfvenic branch, the rarefactive soliton is bell-shaped and it is much narrower than the compressive one. However, for the super-Alfvenic branch, the compressive soliton is bell-shaped and narrower, and the rarefactive one is broadened. When the charge-to-mass ratio of the dust grains is sufficiently high, the width of the rarefactive soliton, in the super-Alfvenic branch, will broaden extremely and a electron depletion will be observed. It is also shown that the bell-shaped soliton can transition to a cusped structure when the velocity is sufficiently high. (C) 2008 American Institute of Physics. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Fluids & Plasmas |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | ELECTRON ACCELERATION ; ION-PLASMA ; STABILITY ; EXISTENCE ; SOLITONS ; AURORA |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000259448900069 |
| 公开日期 | 2011-12-29 |
| 源URL | [http://159.226.72.40/handle/332002/1907]  |
| 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 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Max Planck Inst Extraterr Phys, D-85748 Garching, Germany |
| 推荐引用方式 GB/T 7714 | Li, Yang-fang,Wu, D. J.,Morfill, G. E.. Solitary kinetic Alfven waves in dusty plasmas[J]. PHYSICS OF PLASMAS,2008,15(8):083703. |
| APA | Li, Yang-fang,Wu, D. J.,&Morfill, G. E..(2008).Solitary kinetic Alfven waves in dusty plasmas.PHYSICS OF PLASMAS,15(8),083703. |
| MLA | Li, Yang-fang,et al."Solitary kinetic Alfven waves in dusty plasmas".PHYSICS OF PLASMAS 15.8(2008):083703. |
入库方式： OAI收割
来源：紫金山天文台
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