【摘要】 介绍了用实验测量北京谱仪触发判选系统触发效率的方法．着重介绍触发条件表的设置，事例选择和触发效率的计算，给出各触发条件和不同类型事例的触发效率．更多还原

【Abstract】 An experimental method to measure the efficiency of the trigger for the BES is introduced. The design of trigger table, event selection and calculation of efficiency are described. The efficiencies of various trigger conditions and event types are given.更多还原