【摘要】 羊八井ARGO实验正处于探测器安装及试运行阶段 ,整个阵列由 184 8个工作于流光模式的单层RPC探测器构成 .依靠RPC读出条的数字读出只能测量小簇射事例的次级粒子数目 ,为了实现逐事例区分“膝区”原初宇宙线的成分及其能谱研究 ,对探测器增加了模拟读出 ,以实现对EAS芯区高达 10 4 /m2 的次级粒子数密度的精确测量 .本文对RPC探测器性能及大动态范围模拟读出板的信号和性能做了初步的分析和研究更多还原

【Abstract】 The YBJ ARGO experiment is presently in the mounting and debugging phase at the Yangbajing High Altitude Cosmic Ray Laboratory,Tibet,China.The YBJ ARGO EAS array is composed of bakelite RPCs which operate in the streamer mode.The digital read out,performed by means of read out strips,allows measuring the secondary particle number of small size air showers.To extend the dynamic range of the secondary particle number density up to 10 4/m 2,thus to measure the component and spectrum of primary cosmic rays at the knee region,it is necessary to implement the analog read out of the RPC,which is achieved by encapsulating each RPC with two Big PADs.This paper reports on the primary analysis of the analog read out signal of the Big PAD under different gas mixtures,including the amplitude distribution and ratio of the single streamer signal.更多还原