低能宇宙射线与扰动Magnetosphere
Low Energy Cosmic Rays and the Disturbed Magnetosphere
摘要：
低能银河系宇宙射线以及在太阳表面或行星际介质中加速到高能的粒子可以进入地球上某一特定位置上方的大气层，这取决于磁层的状态。从中子监测器（NM）网络推导出的宇宙线各向异性的解释，必须假设磁层结构的变化。本文在简要回顾前人报道的扰动磁层中地磁截止点变化的基础上，给出了地面上选定点和一颗低空极轨卫星的transmittance函数和渐近方向的计算结果。的计算，根据不同的可用模型的外部源的地磁场进行安静的时间段和强地磁扰动发生在2003年和2004年。
英文摘要：
Low energy galactic cosmic rays as well as particles accelerated to high energies either at the solar surface or in the interplanetary medium have access to the atmosphere above a given position on the Earth depending upon the state of the magnetosphere. The interpretation of the cosmic ray anisotropy, deduced from the neutron monitor (NM) network, must assume the variability of the magnetospheric configuration. Along with a short review of changes of the geomagnetic cutoffs in the disturbed magnetosphere reported in the earlier papers, we present the results of computations of transmissivity function and asymptotic directions for selected points on the ground and for a low altitude polar orbiting satellite as well. The computations, based on different available models of geomagnetic field of external sources are performed for quiet time periods and for strong geomagnetic disturbances occurred in 2003 and 2004.
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