标题： 皮埃尔·奥格表面探测器的触发系统：运行、效率和稳定性 显示英文标题

标题： The trigger system of the Pierre Auger Surface Detector: operation, efficiency and stability

摘要： 描述了皮埃尔·奥格天文台表面探测器(SD)的触发系统，从单站识别候选簇射($E>1$EeV)，在大量背景(主要是单μ子)中，到更高层级的中央触发器选择真实事件和排除随机巧合(包括重建精度)。使用真实数据评估了单站触发效率，并将展示事件选择层次结构的高性能。 显示英文摘要

摘要： The trigger system of the Surface Detector (SD) of the Pierre Auger Observatory is described, from the identification of candidate showers ($E>1$ EeV) at the level of a single station, among a huge background (mainly single muons), up to the selection of real events and the rejection of random coincidences at a higher central trigger level (including the reconstruction accuracy). Efficiency of a single station trigger is evaluated using real data , and the high performance of event selection hierarchy will be demonstrated.