宁静期间双峰电流片的观测研究
文献类型：期刊论文
| 作者 | 汤朝灵 ; 路立 ; 李中元 |
| 刊名 | 地球物理学报
 |
| 出版日期 | 2007 |
| 卷号 | 50期号:4页码:979-985 |
| 关键词 | 双峰电流片 Cluster观测 Timing分析 磁尾 等离子体不稳定性 |
| ISSN号 | 0001-5733 |
| 其他题名 | Cluster observation and analysis of bifurcated current sheet structure in a quiet time |
| 通讯作者 | 北京8701信箱 |
| 中文摘要 | 2001年8月19日2011-2030UT,AE指数相对较小(40-130nT),Cluster卫星穿越磁尾电流片.利用Cluster观测资料分析,发现宁静期间有双峰电流片存在,这期间没有明显的高速流,没有明显的电流片振荡．同时,进一步分析双峰电流片中的离子特性发现:质子数密度Np在中性线( |
| 英文摘要 | We analyse the vertical structure of the magnetotail current sheet within 2011-2030 UT on 19 August 2001,during which the Cluster spacecrafts crossed the current sheet in a quiet time. In the intervals ,the current sheet moved slowly,and the value of the AE index was relatively small,about 40-130 nT.In the quiet time, without fast plasma flow and without significant flapping motion,we also directly observed the bifurcated current sheet.Ion density,velocity and temperature,measured by Cluster spacecrafts in the current sheet during 2011-2030 UT 19 August 2001 are discussed.It is shown that ion density was comparatively bigger near the neutral line,presented non2symmetric distribution,but the distribution of temperature was uniform. And it is observed that in the y direction , the proton bulk velocity is opposite on the both sides of the neutral line. Finally we discuss a possible mechanism for the bifurcated current sheet in a quiet time,which is nonlinear evolution of the lower2hybrid drift instability in the current sheet.These may be important for perfecting the formation mechanism of current sheet bifurcation. |
| 学科主题 | 空间物理 |
| 收录类别 | CSCD |
| 资助信息 | 国家自然科学基金项目 |
| 语种 | 中文 |
| CSCD记录号 | CSCD:2839726 |
| 源URL | [http://ir.cssar.ac.cn/handle/122/1408]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | 汤朝灵,路立,李中元. 宁静期间双峰电流片的观测研究[J]. 地球物理学报,2007,50(4):979-985. |
| APA | 汤朝灵,路立,&李中元.(2007).宁静期间双峰电流片的观测研究.地球物理学报,50(4),979-985. |
| MLA | 汤朝灵,et al."宁静期间双峰电流片的观测研究".地球物理学报 50.4(2007):979-985. |
入库方式： OAI收割
来源：国家空间科学中心
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