A THEORETICAL STUDY ON THE FLUX DISTRIBUTION OF HEAVY ION O+ IN THE MAGNETOSPHERE
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摘要: 应用求解得到的分布函数,研究了北半球子午面内极光带区起源的重离子O+在磁层中的通量密度定态分布及其特性。结果表明:(1)重离子O+通量密度分布沿GSMZ轴方向呈峰状结构,其峰值随地心距离增大而减小,在近地空间减小较快;(2)磁扰动时,O+离子占据的空间范围较磁宁静时大,通量峰较不突出;(3)理论估算的磁尾等离子体片边界层附近重离子O+通量密度与观测结果相一致。Abstract: Based on the distribution function got by solving the dynamic equation,the flux distribution and its features of ionospheric heavy ion O+ originating in the auroral zone on the meridian plane are studied.The results show that:1.the flux distribution of the O+ along the z-direction mainly appears as a peak--like structure,its maximum reduces as the geo-centre distance increasing and more quickly in near geo-space than that in far geo-space;2.the ion O+ exists in larger geo-space and the flux peak is less prominent when Kp=3-5 than that when Kp=0;3.the calculated flux of the ion O+ in the boundary of the plasmasheet is about 105cm2.s-1.The results are consistent with the observation.
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Key words:
- Magnetosphere /
- Heavy ion O+ /
- Flux distribution
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