The Evolution of Galactic Cosmic Ray Element Spectra from Solar Minimum to Solar Maximim: ACE Measurements
The Evolution of Galactic Cosmic Ray Element Spectra from Solar Minimum to Solar Maximim: ACE Measurements
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银河宇宙线元素光谱从太阳极小值到太阳极大值的演变：ACE 测量
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
N. Yanasak
中科院分区：
文献类型：
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作者：
A. Davis;R. Mewaldt;W. Binns;E. Christian;C. Cohen;A. Cummings;J. George;P. Hink;R. Leske;E. Stone;T. T. Rosenvinge;M. Wiedenbeck;N. Yanasak
在1 Au的能量范围40 - 500 MeV/核子内，从铍到镍的银河宇宙线（GCR）元素的光谱正在被连续测量，
高级合成探测器上的仪器
（ACE）。这些仪器的收集能力使得每隔几个月就可以计算出大多数元素的精确光谱。在太阳周期的GCR光谱的时间变化的测量是很重要的了解太阳调制过程，也为完善模型的近地辐射环境进行屏蔽和剂量计算的载人和无人空间飞行任务。我们报告的ACE观测GCR元素光谱的演变，从1997年太阳极小期至2001年春季。我们发现ACE的测量和预测的近地辐射环境的可用模型之间的显着差异，这表明这些模型需要修订。我们描述了一个宇宙射线星际传播和太阳调制模型，提供了一个改进的适合ACE测量辐射环境模型相比，目前使用的。
The spectra of galactic cosmic ray (GCR) elements from Beryllium to Nickel in the energy range 40 - 500 MeV/nucleon at 1 AU are being continuously measured by
instruments on-board the Advanced Composition Explorer
(ACE). The collecting power of these instruments allows statistically precise spectra to be calculated every few months for most elements. Measurements of temporal variations in GCR spectra over the solar cycle are important for understanding solar modulation processes, and also for refining models of the near-earth radiation environment used to perform shielding and dose calculations for manned and unmanned space missions. We report on ACE observations of the evolution of GCR element spectra from solar minimum in 1997 through Spring 2001. We find significant differences between the ACE measurements and the predictions of available models of the near-Earth radiation environment, suggesting that these models need revision. We describe a cosmic ray interstellar propagation and solar modulation model that provides an improved fit to the ACE measurements compared to radiation environment models currently in use.