Trigger and aperture of the surface detector array of the Pierre Auger Observatory
Trigger and aperture of the surface detector array of the Pierre Auger Observatory
复制标题
皮埃尔俄歇天文台表面探测器阵列的触发器和孔径
DOI：
10.1016/j.nima.2009.11.018
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Abraham J
中科院分区：
文献类型：
--
作者：
Abraham J
皮埃尔·俄歇天文台的表面探测器阵列由1600个水-切伦科夫探测器组成，用于研究超高能宇宙射线产生的广泛空气簇射（EAS）。我们描述的触发层次，从一个单一的探测器的水平，在一个大的背景（主要是随机的单宇宙射线μ子），直到选择的真实的事件和拒绝随机巧合的候选人阵雨的识别。这样的触发使得表面探测器阵列对于能量高于3× 1018 eV的EAS的探测完全有效，对于0 °和60 °之间的所有天顶角，与撞击点的位置和初级粒子的质量无关。在这些能量和角度范围内，表面阵列的曝光可以完全基于几何接受度来确定。
The surface detector array of the Pierre Auger Observatory consists of 1600 water-Cherenkov detectors, for the study of extensive air showers (EAS) generated by ultra-high-energy cosmic rays. We describe the trigger hierarchy, from the identification of candidate showers at the level of a single detector, amongst a large background (mainly random single cosmic ray muons), up to the selection of real events and the rejection of random coincidences. Such trigger makes the surface detector array fully efficient for the detection of EAS with energy above 3×1018eV, for all zenith angles between 0∘and 60∘, independently of the position of the impact point and of the mass of the primary particle. In these range of energies and angles, the exposure of the surface array can be determined purely on the basis of the geometrical acceptance.