Properties of the neutral energetic atoms emitted from Earth’s ring current region
Properties of the neutral energetic atoms emitted from Earth’s ring current region
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DOI：
10.1063/1.1500736
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发表时间：
2002-08
影响因子：
2.2
通讯作者：
Chengcai Shen;Z. Liu
中科院分区：
文献类型：
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作者：
Chengcai Shen;Z. Liu
为了为我国“双星星星计划”极轨卫星上的高能中性原子（ENA）探测器研制提供可靠的理论依据，并为今后的ENA观测资料分析做准备，开展了磁暴主相高能中性原子（ENA）的数值模拟研究。在这项研究中，一个近似的分析模型的环电流粒子分布，包括由于电荷交换过程的离子损失，已经开发。模拟结果表明，存在两个最大ENA通量区：环电流内边界区和粒子沉降区，分别位于北方和南极。磁暴越强，粒子注入越低，环电流区发射的ENA通量越大。在有利位置处的ENA检测器可以测量注入区域或注入前沿的内边界。ENA探测器能够测量环电流离子的不均匀性。
Simulations of energetic neutral atoms (ENA) during the geomagnetic storm main phase have been carried out to provide reliable theoretical foundations for the development of an ENA detector on board the polar satellite of the Chinese Double Star Program (DSP), and to make preparation for the future ENA observational data analyses. In this research, an approximate analytical model for the ring current particle distributions, including the ion loss due to charge exchange processes, has been developed. The simulations have shown that there are two maximum ENA flux regions: The ring current inner boundary region, and the particle precipitation region at the northern and southern poles. The stronger the storms, the lower the particle injection, and the larger the flux of ENA emitted from the ring current region. The ENA detector at advantageous positions can measure the inner boundary of the injection region or the injection front. The ENA detector is able to measure the inhomogeneity of the ring current ions....