计算物理 ›› 1997, Vol. 14 ›› Issue (6): 851-856.

• 论文 • 上一篇    

超高能宇宙线广延大气簇射(EAS)观测阵列事例重建的研究

罗光宣, 谭有恒, 张春生, 张慧敏   

  1. 中国科学院高能物理研究所, 中国科学院宇宙线与高能天体物理开放实验室 北京 100039
  • 收稿日期:1995-11-13 修回日期:1997-04-01 出版日期:1997-11-25 发布日期:1997-11-25

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

Luo Guangxuan, Tan Youheng, Zhang Chunsheng, Zhang Huimin   

  1. Institute of High Energy Physics. Academia Sinica. Beijing 100039
  • Received:1995-11-13 Revised:1997-04-01 Online:1997-11-25 Published:1997-11-25

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)。

关键词: 宇宙线, 广延大气簇射(EAS), 重建, 最优化算法, 单纯形算法

Abstract: 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 EAS-FIT 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.

Key words: cosmic pays extersive air shower(EAS), reconstruction optimum algorithm, simplex method

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