论文标题
研究高电场变化对ARGO-YBJ实验检测到的宇宙射线通量的影响
Study of the Influence of High Electric Field Variations on Cosmic Ray Flux detected by the ARGO-YBJ Experiment
论文作者
论文摘要
本文是作者的博士学位论文结果的概述。 Argo-YBJ是位于Yangbajing（中国西藏）的广泛空气淋浴探测器，位于4300 m A.S.L.它是由全覆盖地毯加一个电阻板腔室（总表面约为6700 m^2）制成的，该电阻室分为153个称为簇的单元。该实验具有两种不同的操作模式。前者是缩放器模式，计算粒子多重性> = 1，> = 2，> = 3，> = 4的事件数量允许达到检测器的最低能量阈值（几个GEV）。后者的淋浴模式测量了每个粒子的坐标和到达时间，撞上地毯，以几百个GEV的能量阈值进行完整的淋浴重建。由于缩放器模式的高灵敏度，因此从缩放器计数中删除所有环境参数效应变得非常重要。仔细研究具有环境变量（例如大气压，温度，局部放射性）的宇宙射线变化，可以正确估计以缩放器模式注册的信号的重要性。讨论了与高电场变化相对应的计数速率变化的发作，以及对雷暴期间宇宙射线淋浴的时间和空间特征的研究。
This paper is an overview of the author's PhD thesis results. ARGO-YBJ is an extensive air shower detector located at Yangbajing (Tibet, China) at 4300 m a.s.l. It is made by a full coverage carpet plus a guard ring (total surface about 6700 m^2) of Resistive Plate Chambers grouped into 153 units called clusters. The experiment has two different operation modes. The former, the scaler mode, counts the number of events with particle multiplicity >=1, >=2, >=3, >=4 allowing to reach the lowest energy threshold of the detector (few GeVs). The latter, the shower mode, measures coordinates and arrival time of each particle hitting the carpet for a complete shower reconstruction at an energy threshold of few hundreds of GeVs. Due to the high sensitivity of scaler mode it becomes very important remove all environmental parameter effects from scaler counts. The careful study of cosmic ray variations with environmental variables (such as atmospheric pressure, temperature, local radioactivity) allowed the correct estimation of the significance of signals registered in scaler mode. Episodes of counting rate variations both in scaler and shower mode in correspondence to high electric field variations are discussed, together with the study of temporal and spatial characteristics of cosmic ray showers during thunderstorms.
