超高能宇宙线广延大气簇射(EAS)观测阵列事例重建的研究  

STUDY OF THE RECONSTRUCTION OF THE EAS EVENTS AT ULTRA HIGH ENERGIES

作　　者：罗光宣[1,2] 谭有恒[1,2] 张春生[1,2] 张慧敏[1,2] 

机构地区：[1]中国科学院高能物理研究所 [2]中国科学院宇宙线与高能天体物理开放实验室

出　　处：《计算物理》1997年第6期851-856,共6页Chinese Journal of Computational Physics

摘　　要：通过认真分析影响ＥＡＳ事例重建精度与速度的种种精细因素，采用适当的算法（如改进的单纯形法与变度量最优化算法等），设计、编制了具有一定通用性的ＥＡＳ阵列事例重建程序ＥＡＳＦＩＴ。北京怀柔ＥＡＳ阵列［１］采用ＥＡＳＦＩＴ后，改善了阵列综合测量精度与参数离线重建速度（提高速度１００倍左右），并得到了该ＥＡＳ阵的一些重要的物理结果（如“ｋｎｅｅ”区能谱等）。Taking into account of various factors which effect the reconstruction precision of EAS events and selecting some suitable optimum algorithn (such as simplex method algorithm, DFS algorithm). A new software EASFIT is made, which is of wider use and described briefly with some applications. This new software was been used to analyse the EAS raw data of Beijing Huairou array. The results show that it can improve overall precision of the array and greatly increse the speed of off line reconstruction (20 120 times faster than the old one). In addition, some important physics results can be obtained such as energy spectrum at the ‘keen’ region and so on.

关 键 词：宇宙线 广延大气簇射 重建 最优化算法 超高能 

分 类 号：O572.1[理学—粒子物理与原子核物理]