用小阵列水切伦科夫探测器研究cosmic ray分布的各向异性
A Study on anisotropy of cosmic ray distribution with a small array of water-cherenkov detectors
摘要：
对到达方向各向异性的研究是研究宇宙射线原色起源和传播的重要工具。记录许多宇宙射线的一个简单方法是记录许多探测器之间的重合。我们在德黑兰（35 - 43 N，51 - 20 E，1200 m a.s.l）用一个小型水切伦科夫探测器阵列监测了多TeV的宇宙射线。记录到超过1.1*10^6次广泛的空气簇射事件。除了由于地球在银河系中的运动而产生的康普顿-吉丁效应之外，还观察到了各向异性，这是由于宇宙射线沿银河系臂流动的单向各向异性。
英文摘要：
The study of the anisotropy of the arrival directions is an essential tool to investigate the origin and propagation of cosmic rays primaries. A simple way of recording many cosmic rays is to record coincidences between a number of detectors. We have monitored multi-TeV cosmic rays by a small array of water cherenkov detectors in Tehran(35 43 N, 51 20 E, 1200m a.s.l). More than 1.1*10^6 extensive air shower events were recorded. In addition to the Compton- Getting effect due to the motion of the earth in the Galaxy, an anisotropy has been observed which is due to a unidirectional anisotropy of cosmic ray flow along the Galactic arms.
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