The measurement of the electron radiation inside the satellite is important for engineering and space environment researches.The particle radiation detectors (PRD) on board CBERS-1 and CBERS-2 made great contribution ...The measurement of the electron radiation inside the satellite is important for engineering and space environment researches.The particle radiation detectors (PRD) on board CBERS-1 and CBERS-2 made great contribution to understanding of the space environment.Then,what is the radiation relationship between inside and outside the satellite? The Monte Carlo simula-tion with Geant4 was implemented to study the problem.The boundaries of the energy bins of 0.5 and 2 MeV were precisely corresponding to outside energies of 0.99 and 2.52 MeV,respectively.Besides the changes of the energy bins,the fluxes inside were smaller than those of the corresponding bins outside.The spectrum inside the satellite was harder than that outside.An indicator was that the flux ratio of the high energy bin to the low energy bin increased more than 20% from outside to inside.The geometric factor (GF) relates to the incident energy of electrons.By using the AE-8 model to derive the incident spec-trum,the GFs of the low and high energy bins were 1.15 and 0.70 cm2 sr,respectively.GF of the low energy bin was larger than that of the high energy bin.But they were both smaller than the previous results.It was due to the scattering,straggle and shielding effects.展开更多
基金supported by the Special Foundation of China Meteorological Administration (Grant No. GYHY200706041)the Foundation of Coconstruction of Beijing Municipal Commission of Education (Grant No. XK100010404)
文摘The measurement of the electron radiation inside the satellite is important for engineering and space environment researches.The particle radiation detectors (PRD) on board CBERS-1 and CBERS-2 made great contribution to understanding of the space environment.Then,what is the radiation relationship between inside and outside the satellite? The Monte Carlo simula-tion with Geant4 was implemented to study the problem.The boundaries of the energy bins of 0.5 and 2 MeV were precisely corresponding to outside energies of 0.99 and 2.52 MeV,respectively.Besides the changes of the energy bins,the fluxes inside were smaller than those of the corresponding bins outside.The spectrum inside the satellite was harder than that outside.An indicator was that the flux ratio of the high energy bin to the low energy bin increased more than 20% from outside to inside.The geometric factor (GF) relates to the incident energy of electrons.By using the AE-8 model to derive the incident spec-trum,the GFs of the low and high energy bins were 1.15 and 0.70 cm2 sr,respectively.GF of the low energy bin was larger than that of the high energy bin.But they were both smaller than the previous results.It was due to the scattering,straggle and shielding effects.
