Air shower array at the university of Puebla for the study of cosmic rays

被引：0
|
作者：
Cotzomi, J [1 ]
Martínez, O [1 ]
Moreno, E [1 ]
Salazar, H [1 ]
Villaseñor, L [1 ]
机构：
[1] Benemerita Univ Autonoma Puebla, Fac Fis Matemat, Puebla 72000, Mexico
来源：
REVISTA MEXICANA DE FISICA | 2005年 / 51卷 / 01期
关键词：
cosmic rays; arrival direction; energy spectrum;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We describe the design and performance of an extensive air shower detector array built in the Campus of the University of Puebla (located at 19degreesN, 90degreesW, 800 g/cm(2)) to measure the energy and arrival direction of primary cosmic rays with energies around 10(15) eV, known as the knee of the cosmic ray spectrum. The array consists of 18 liquid scintillator detectors (12 in the first stage), and 3 water Cherenkov detectors (one of 10 m(2) cross section and two smaller ones of 1.86 in m(2) cross section), distributed in a square grid with a detector spacing of 20 m over an area of 4000 m(2). In this paper, we discuss the calibration and stability of the array and report on preliminary measurements of the arrival directions and energies of cosmic ray showers detected with the first stage of the array consisting of 12 liquid scintillator and 3 water Cherenkov detectors. Our results show that the array is efficient in detecting primary cosmic rays with energies in the range of 10(14) to 10(16) eV, with an angular resolution lower than 5.5degrees for zenithal angles in the range of 20degrees to 60degrees. We also point out that the capability of water Cherenkov detectors to separate electromagnetic from muon components of extensive air showers. Finally we remark that this facility is also used to train students interested in the field of cosmic rays.
引用
收藏
页码：38 / 46
页数：9
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