低高度内辐射带高能质子空间分布位形的研究

	低高度内辐射带高能质子空间分布位形的研究
	乐贵明 ; 叶宗海
刊名	空间科学学报
	2003
卷号	23 期号:4 页码:278-285
关键词	内辐射带高能质子南大西洋异常区低高度分布位形
ISSN号	0254-6124
其他题名	THE STUDY OF SPACE DISTRIBUTION CONFIGURATION OF THE RADBELT PROTONS WITH HIGH ENERGY
通讯作者	北京8701信箱
中文摘要	利用国际地磁参考场模式(IGRF模式)分析了1970—2000年低高度南大西洋负磁异常区位形的漂移与变化,给出了几个高度异常区中心位置磁场强度的变化和位置的变化.利用带电粒子的运动学方程,简要分析了低高度辐射带高能粒子的运动,得出在低高度,磁场是决定辐射带高能粒子空间强度与分布的决定性因素.低高度辐射带空间分布位形的变化特征应该与低高度南大西洋负磁异常区的变化特征基本一致.低高度南大西洋负磁异常区的特征可以作为低高度辐射带空间分布位形的一个初步判据.
英文摘要	By using International Geomagnetic Reference Field (IGRF), the paper com-putes the drift of South Atlantic Anomaly- (SAA) region at several altitdes lower than 1000 km for the interval of 1970-2000.几`'he results,m center of the SAA moves 40-60 towards west aiae center of the S}}A,mire than 10towards the norte extpr.of one A i.z th.c ear 6000 includes that of the SAA xte :ds mth some scale in both latitude and longitude directions. The value of geomagnetic field strength at the center of SAA in 2000 is lower than that in 1970. The biggest scale for the decrease in geomagnetic field strength at the center of the SAA is no more than 3.87% for the altitudes lower than 1000 km. It is enough to use internal field for the altitudes lower than 1000 km, so the results are reliable.The charged particles with energy higher than 10 MeV mainly distribute in the SAA region for low altitudes based on AP8 Model, but the model was just suit for epoch 1960 to 1970. Because the kinetic properties of a charged particle are almost completely decided by the properties of the geomagnetic field at altitudes lower than 1000 km, so we can know the charged particles with energy higher than 10 MeV still distribute in SAA region. The space distribution configuration of charged particles with high energy should basically be consistent with the space distribution configu-ration of the geomagnetic field for low altitudes. The space configuration of the SAA region in low altitudes can be considered as the criterion of the space configuration of radiation belt protons with energy higher than 10 MeV.
学科主题	空间环境
收录类别	CSCD
资助信息	国家863资助项目
语种	中文
CSCD记录号	CSCD:1199935
内容类型	期刊论文
源URL	[http://ir.cssar.ac.cn/handle/122/397]
专题	国家空间科学中心_空间环境部
推荐引用方式 GB/T 7714	乐贵明,叶宗海. 低高度内辐射带高能质子空间分布位形的研究[J]. 空间科学学报,2003,23(4):278-285.
APA	乐贵明,&叶宗海.(2003).低高度内辐射带高能质子空间分布位形的研究.空间科学学报,23(4),278-285.
MLA	乐贵明,et al."低高度内辐射带高能质子空间分布位形的研究".空间科学学报 23.4(2003):278-285.