【摘要】 本文报道了用宇宙线带电粒子对北京谱仪(BES)桶部簇射计数器多项性能测试的结果,诸如从1到24层的信号电荷量谱;各层计数管的探测效率;信号电荷量在z向(沿丝方向)的均匀性;电荷分配法的z向分辨率;宇宙线径迹重建等.同时还讨论了该计数器工作气体的选择问题.更多还原

【Abstract】 This paper presents the preliminary cosmic ray test results on the performances of BES(Beijing Spectrometer)barrel shower counter,such as the signal charge spectrum and the detection efficiency of each sensitive layer,the uniformity of signal charge along anode wire direction,the position resolution with charge division,the reconstruction of cosmic rays,etc..The choice of gas mixture for BES barrel shower counter is also discussed.更多还原