论文标题
用两平方米的地面检测器观察到的次级宇宙射线中的大气温度效应
Atmospheric Temperature Effect in secondary cosmic rays observed with a two square meter ground-based detector
论文作者
论文摘要
基于定时电阻板室（TRPC）单元的高分辨率2 M $^2 $跟踪检测器已安装在圣地亚哥大学（Santiago de Costela）（西班牙）物理学学院，以提高我们对我们对地球表面的宇宙射线的理解。在对检测器进行短暂的调整后，对次级宇宙射线成分的大气温度效应进行了研究。为了获得温度系数的分布，$ W_T（H）$，已实施了基于主成分分析（PCA）的方法（PCA），使用作为输入，近乎垂直的宇宙射线轨道的测量速率，与理论期望良好一致。该方法成功地消除了不同大气层之间存在的相关性，否则这将是主要的。我们简要描述了初始校准和压力校正程序，对于隔离温度效应至关重要。总体而言，测得的宇宙射线速率通过系数$α_t= -0.279 \ pm 0.051 $ \％/k显示了有效大气温度的预期反相关。费率遵循季节性变化，并且明确确定了异常的短期事件。
A high resolution 2 m$^2$ tracking detector, based on timing Resistive Plate Chamber (tRPC) cells, has been installed at the Faculty of Physics of the University of Santiago de Compostela (Spain) in order to improve our understanding of the cosmic rays arriving at the Earth's surface. Following a short commisioning of the detector, a study of the atmospheric temperature effect of the secondary cosmic ray component was carried out. A method based on Principal Component Analysis (PCA) has been implemented in order to obtain the distribution of temperature coefficients, $W_T(h)$, using as input the measured rate of nearly vertical cosmic ray tracks, showing good agreement with the theoretical expectation. The method succesfully removes the correlation present between the different atmospheric layers, that would be dominant otherwise. We briefly describe the initial calibration and pressure correction procedures, essential to isolate the temperature effect. Overall, the measured cosmic ray rate displays the expected anticorrelation with the effective atmospheric temperature, through the coefficient $α_T= -0.279 \pm 0.051 $ \%/K. Rates follow the seasonal variations, and unusual short-term events are clearly identified too.
