简单重心法快速重建大EAS芯位

簇射芯位重建是基于地面的宇宙线观测实验的关键工作之一.利用广延大气簇射（EAS）和探测器蒙特卡洛模拟程序，模拟超高能原初宇宙线粒子质子和铁核成分产生的簇射前沿在探测器阵列的分布行为，根据模拟数据，分析了击中数最大探测器灵敏单元与簇射芯位的关系，以及重心法重建簇射芯位的精度，结合二者的特点，提出简单重心法重建簇射芯位，初步研究表明，该方法可快速重建EAS芯位，并使芯位重建精度提高到1 m.

Reconstruction Method for Shower Core of Vary High Energy Cosmic Ray

The reconstruction of shower core is one of the key works of cosmic ray experiment based on terrene. In this paper, by using Monte Carlo program for extent air shower and detector, the distribution of front of air shower is simulated for super high energy cosmic rays, proton and iron. According to the simulation data, the relation between shower core and sensitive unit with maximum hit number of detector array is analyzed. One simple method for weight core reconstruction is proposed by combining above two properties. Initial research results show that this method can reconstruct EAS core fast, the error of this reconstructed EAS core less than 1 m.