太阳质子事件期间内辐射带质子通量的变化

TIME VARIATION OF THE INNER RADIATION BELT PROTON INTENSITIES DURING SOLAR PROTON EVENTS

本文介绍风云一号(B)卫星上的宇宙线成份监测器,在1991年1月30日及31目的耀斑期间及其前后几天,对能量在4—23MeV内的内辐射带质子通量的观测结果,并对这些结果做了详细的分析.结果表明,在这两次耀斑及其所产生的太阳质子事件期间,内辐射带质子通量有显著的变化:在磁漂移壳参量L≥1.64的空间,质子通量显著增强,增幅在40％—200％之间;在L=1.30—1.60的空间,质子通量的增强也较为明显,增幅在20％以上;总的变化趋势是,L越大的地方,质子通量的增强就越显著.质子事件之后,内辐射带质子通量又逐渐回复到质子事件之前平衡结构时的水平.

This paper presents recent observation of the Inner Radiation Belt proton intensities during the periods of 30 and 31 January 1991 solar proton events, made by the Chinese satellite 'Fengyun-1 (B)'. Analyses of the observation show that proton intensities of the Inner Radiation Belt enhanced obviously during these two solar proton events: In the regions with L≥1.64, the proton intensities increased by 40%-200%;In the regions with L = 1.30-1.60, the increases of proton intensities were also over 20%. The increases in the proton intensities are more prominent in outer magnetic drift shells. After the solar proton events, the enhanced proton intensities of the Inner Radiation Belt decreased gradually to their stationary level.