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arXiv 1402.0467astro-ph.HEhep-ex
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用AMS-02测量初级Cosmic Ray质子通量

Primary Cosmic Ray Proton Flux Measured by AMS-02

C. Consolandi

摘要:

阿尔法磁谱仪(AMS-02)是一种高能粒子探测器,旨在研究空间宇宙射线的起源和性质。它于2011年5月19日安装在国际空间站(ISS)上。在运行的头两年,AMS-02对质子通量进行了精确测量。在低刚度范围内,从1 GV到20 GV,每天测量的质子通量的统计误差小于1%。在相同的刚度范围内,还观察到太阳调制效应引起的刚度逐渐减小以及太阳耀斑和日冕物质抛射引起的凌日变化。在20 - 100 GV的刚度范围内,AMS-02数据没有显示出剧烈的变化,并且结果与其他实验一致。在100 GV以上,AMS-02质子通量表现出单功率低行为,没有精细结构也没有制动。

英文摘要:

The Alpha Magnetic Spectrometer (AMS-02) is a high energy particle detector designed to study origin and nature of cosmic rays up to a few TV from space. It was installed on the International Space Station (ISS) on May 19, 2011. During the first two years of operation AMS-02 performed precise measurements of the proton flux. In the low rigidity range, from 1 GV to 20 GV, the proton flux was daily measured with a statistical error less than 1%. In the same rigidity range a gradual decrease due to Solar modulation effect and transit variations due to Solar Flares and Coronal Mass Ejection were also observed. In the rigidity range from 20 GV up to 100 GV instead, AMS-02 data show no drastic variation and the results are consistent with other experiments. Above 100 GV, AMS-02 proton flux exhibits a single power low behavior with no fine structures nor brakes.

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