MHD模拟磁尾横断面结构与太阳风粒子注入机制

	MHD模拟磁尾横断面结构与太阳风粒子注入机制
	郭九苓; 沈超; 刘振兴
刊名	科学通报
	2014
卷号	59 期号:4-5 页码:345-350
关键词	磁尾等离子片 MHD模拟太阳风 IMF南北向
ISSN号	0023-074X
其他题名	Simulation of the cross sections of the magnetotail and particle transferred into the plasma sheet under north- and southward IMF conditions
中文摘要	基于全球三维磁层MHD(Magnetohydrodynamics)模拟模型，研究了行星际磁场(Interplanetary Magnetic Field, IMF)北向与南向时磁尾横断面(X=-18 RE)的结构及等离子片的粒子注入机制.模拟结果很好地符合一些已知的观测数据和经验模型.从向阳面磁层顶IMF及重联后磁力线尾向运动过程的角度，对磁尾横断面粒子热压力分布、磁力线投影、等离子片或电流片旋转、粒子流场分布等结构进行了合理的解释.根据模拟得到的磁尾横断面结构，及IMF 北向与南向时磁力线投影显著不同的位形，可以通过E*B漂移很好地说明不同IMF条件下，太阳风粒子对磁尾等离子片的不同注入特性.另外，还通过磁尾横断面磁场梯度的计算，说明了太阳风向等离子片粒子注入的晨-昏不对称性.
英文摘要	By a newly modified global MHD simulation model, We have studied the structure of the cross sections of the magnetotail (X=-18 RE) and the mechanism of plasma transferred into plasma sheet under different IMF conditions(north- and southward). The results are consistent with some observations and experiential models. We illustrate the properties of thermal pressure, magnetic field projection, plasma or current sheet rotation, and flow field at the X=-18 RE cross section, and explain the features by the tailward-moving processes of IMF and reconnected field lines on the dayside magnetopause. We find the magnetic field projections on the tail cross section have different configurations under different IMF conditions, and the differences can easily reveal the nature of plasma ejected into the plasma sheet from solar wind by ExB mechanism. Furthermore, we have calculated the magnetic grid-drift distributions at the tail cross section, and point out the possible reason of the dawn-dusk asymmetry of solar wind particles transferring into the plasma sheet.
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,国家重点基础研究发展计划,国家自然科学基金重点项目
语种	中文
CSCD记录号	CSCD:5061376
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/2732]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	郭九苓,沈超,刘振兴. MHD模拟磁尾横断面结构与太阳风粒子注入机制[J]. 科学通报,2014,59(4-5):345-350.
APA	郭九苓,沈超,&刘振兴.(2014).MHD模拟磁尾横断面结构与太阳风粒子注入机制.科学通报,59(4-5),345-350.
MLA	郭九苓,et al."MHD模拟磁尾横断面结构与太阳风粒子注入机制".科学通报 59.4-5(2014):345-350.