L3宇宙线实验触发系统和触发效率的测量  

Introduction of the Trigger System and the Measurement for Trigger Efficiency at L3+Cosmics Experiment

作　　者：李忠朝[1] 郁忠强[1] 过雅南[1] 徐玉朋[1] 姚志国[1] 李德[1] 

机构地区：[1]中国科学院高能物理研究所,北京100039

出　　处：《高能物理与核物理》2002年第2期172-179,共8页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 ( 1 99995 0 0 );中国科学院资助~~

摘　　要：介绍了在欧洲核子研究中心 (CERN)的L3探测器上进行的宇宙线实验的触发系统判选过程 ,还介绍了使用蒙特卡洛模拟检验触发系统和计算触发效率的方法 ,并给出了实际数据的测量结果和误差 .结果已用于L3宇宙线实验的The trigger process of L?3+Cosmics experiment at CERN is introduced briefly. Also we checked whether the settings of L?3+Cosmics trigger system by simulation are correct or not and introduced a method on trigger efficiency calculation. To get trigger efficiency for μ spectrum measurement, an experimental data sample, which includes events passing the trigger set to measure the μ spectrum and not passing, is needed. Then L?3+C trigger process is simulated with these events in this sample to know how many events should pass the trigger. By checking a trigger bit recorded in the experimental data, one can know how many events passed the trigger in hardware in these simulated events. The ratio then determines the trigger efficiency for μ spectrum measurement. And the systematic error is analyzed. The results on trigger efficiency have been used to the measurement of μ spectrum.

关 键 词：L3宇宙线实验 粒子探测器 触发系统 触发效率 测量 

分 类 号：O572.1[理学—粒子物理与原子核物理]