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磁场偶极化过程中磁尾离子加速:Ⅱ上行离子速度和能量的变化
Alternative TitleION ACCELERATION IN THE MAGNETOTAIL DURING THE DIPOLARIZATION:Ⅱ ION ACCELERATION AND ENERGIZATION
史建魁; 刘振兴; 北京8701信箱
Department空间天气学国家重点实验室
Source Publication地球物理学报
2000
Volume43Issue:6Pages:738-745
ISSN0001-5733
Language中文
Keyword磁层亚暴 电离层离子 速度 能量 磁场偶极化
Abstract根据采用动力学方程对亚暴期间磁尾磁向偶极形弛豫过程中离子分布函数的模拟结果,研究了磁尾来自电离层的O^+,H^+和HE^+离子的速度及能量随时间的变化.主要结果为:(1)离子的加速及能量变化主要发生在磁场偶极化过程的中期,对应的地心距离位于-12RE到-8RE之间;(2)垂直于磁场方向上离子加速及能量变化较快,平行方向上较慢;(3)轻离子较重离子加速及能量变化快,磁场偶极化终结,3种离子的能量均可
Other AbstractAccording to the simulation of up-flowing ions(i.e.,O + ,H+ and He +)dist ri-bution function and using dynamic equation during dipolarizition in substorm in magnetotail,ion acceleration and energization are investigated. The result s show that,(1) the ion acceler-ation and energization mainly occur in the middle of dipolarization at distance of - 12 R E to- 8 R E,(2) the ion acceleration and energization along the direction perpendicular to mag-netic field are faster than along parallel direction,( 3) variations of speed and energy for lighter ion are faster than that of heavier ion,(4) the higher the initial energyis ,the faster the ion acceleration is,and the more energy is obtained by the ions. The oxygen ion energy theoretically calculated is as high as  102keV at the end of the dipolarization in the magne-totail,this is consistant with observation.
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1333
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
史建魁,刘振兴,北京8701信箱. 磁场偶极化过程中磁尾离子加速:Ⅱ上行离子速度和能量的变化[J]. 地球物理学报,2000,43(6):738-745.
APA 史建魁,刘振兴,&北京8701信箱.(2000).磁场偶极化过程中磁尾离子加速:Ⅱ上行离子速度和能量的变化.地球物理学报,43(6),738-745.
MLA 史建魁,et al."磁场偶极化过程中磁尾离子加速:Ⅱ上行离子速度和能量的变化".地球物理学报 43.6(2000):738-745.
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