A geometric factor calculation method based on the isotropic flux assumption

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 粒子天体物理中心

	A geometric factor calculation method based on the isotropic flux assumption
	Zhao XY(赵小芸); Wang HY(王焕玉); Zhao, XY; Wang, HY; Wu, F; Meng, XC; Ma, YQ; Lu, H; Wang, H; Wang, P
刊名	CHINESE PHYSICS C
	2013
卷号	37 期号:12 页码:126201
关键词	LEPD geometric factor isotropy GEANT4 cosine distribution flux normalization
英文摘要	One of the instruments onboard the China Seismic Electromagnetic Satellite (CSES) is the Low Energy Particle Detector (LEPD). The primary objective of LEPD is to provide measurements of the fluxes, energy spectra and pitch angles of 100 keV to 10 MeV electrons and protons from 2 to 50 MeV in the Earth's magnetosphere. The geometric factor is one of the principle parameters of a detector, which converts the physical quantity count rate to the particle quantity-flux. In this paper, we calculated the geometric factor of LEPD via computer modeling of an isotropic radiation environment. It was first demonstrated that the radiation intensity related should obey a cosine-law, then a general sampling method of generating this distribution via CPS of GEANT4 was explained. Furthermore, combined with flux normalization, a comparison of the geometric factor calculation of a set of 2-layer detectors with different shapes (cylinder, truncated cone and rectangle) was performed. Results show a generally good agreement between simulation and analytical calculations for the cylinder and truncated cone detectors, and the result of the rectangular one, for which there is no accurate analytical formula, is consistent with the previous simulated results by others. As a practical instance of the 2-layer rectangle detector, the geometric factor of LEPD is 10.336 +/- 0.036 cm(2).sr for 10 MeV proton and 8.211 +/- 0.032 cm(2).sr for 8 MeV electron.
学科主题	Physics
收录类别	SCI
WOS记录号	WOS:000329382800013
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224643]
专题	高能物理研究所_粒子天体物理中心
推荐引用方式 GB/T 7714	Zhao XY,Wang HY,Zhao, XY,et al. A geometric factor calculation method based on the isotropic flux assumption[J]. CHINESE PHYSICS C,2013,37(12):126201.
APA	赵小芸.,王焕玉.,Zhao, XY.,Wang, HY.,Wu, F.,...&刘汉一.(2013).A geometric factor calculation method based on the isotropic flux assumption.CHINESE PHYSICS C,37(12),126201.
MLA	赵小芸,et al."A geometric factor calculation method based on the isotropic flux assumption".CHINESE PHYSICS C 37.12(2013):126201.