The secular variation of inner zone high energy proton environment in the SAA
The secular variation of inner zone high energy proton environment in the SAA
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DOI：
10.1360/03yd0526
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发表时间：
2005-12
期刊：
影响因子：
--
通讯作者：
L. Xie;Z. Pu;W. Jiao;S. Fu
中科院分区：
文献类型：
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作者：
L. Xie;Z. Pu;W. Jiao;S. Fu
以NASA标准辐射模型为参考态，采用电荷粒子运动的绝热近似，用DSTM方法研究了低轨内区高能质子环境的长期变化。结果表明，近30年来，南大西洋异常∼1 0 0 0 km处高能质子通量显著增加，质子中心明显西移和扩展。对高能质子的L壳层平均寿命的计算表明，DST为估计内区质子环境的长期变化提供了一种合理的手段。
A long-term variation of the inner zone high-energy proton environment at low orbits was investigated by DSTM using the adiabatic approximation of charge particle motion with NASA standard radiation models as reference states. The DST results show that over the past three decades the fluxes of high-energy protons at ∼1000 km in the South Atlantic Anomaly (SAA) noticeably increased, the center region of proton SAA apparently moved westward and expanded. Calculations of the L-shell averaged lifetime of high-energy protons indicate that the DST provides a reasonable means for estimation of the secular variation of inner zone proton environ-ment.