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国家自然科学基金(11165013)

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相关作者:陈天禄刘茂元李艳荣李桃丽张亮更多>>
相关机构:西藏大学河北师范大学更多>>
发文基金:国家自然科学基金更多>>
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Development of Yangbajing air shower core detector for a new EAS hybrid experiment
2015年
Aiming at the observation of cosmic-ray chemical composition in the "knee" energy region, we have been developing a new type of air-shower core detector (YAC, Yangbajing Air shower Core detector array) to be set up at Yangbajing (90.522° E, 30.102° N, 4300 m above sea level, atmospheric depth: 606 g/m2) in Tibet, China. YAC works together with the Tibet air-shower array (Tibet-Ⅲ) and an underground water Cherenkov muon detector array (MD) as a hybrid experiment. Each YAC detector unit consists of lead plates of 3.5 cm thickness and a scintillation counter which detects the burst size induced by high energy particles in the air-shower cores. The burst size can be measured from 1 MIP (Minimum Ionization Particle) to 106 MIPs. The first phase of this experiment, named "YAC- I ", consists of 16 YAC detectors each with a size of 40 cm×50 cm and distributed in a grid with an effective area of 10 m2. YAC- I is used to check hadronic interaction models. The second phase of the experiment, called "YAC-Ⅱ", consists of 124 YAC detectors with coverage of about 500 m2. The inner 100 detectors of 80 cm×50 cm each are deployed in a 10×10 matrix with a 1.9 m separation; the outer 24 detectors of 100 cm×50 cm each are distributed around these to reject non-core events whose shower cores are far from the YAC- Ⅱ array. YAC- Ⅱ is used to study the primary cosmic-ray composition, in particular, to obtain the energy spectra of protons, helium and iron nuclei between 5× 1013 eV and 1016 eV, covering the "knee" and also connected with direct observations at energies around 100 TeV. We present the design and performance of YAC- Ⅱ in this paper.
刘金胜黄晶陈鼎张颖翟留名陈旭胡孝斌林钰晖张学尧冯存峰贾焕玉周勋秀单增罗布陈天禄厉海金刘茂元袁爱芳
宇宙线大尺度各向异性的分析方法
2013年
模拟研究了2种基于等天顶角方法的全天区扫描方法.一种是已经应用于全天区搜寻γ源的传统普通等天顶角方法,一种是基于等天顶角方法的χ2拟合方法.从模拟结果看,二者之间存在着不可忽视的差异,前一种方法在分析存在大尺度各向异性的宇宙线样本时不能正确反映各向异性的真实现象,而后一种方法分析结果能够正确反映真实物理现象,但是由于受到构造χ2方程的限制使得分析全天区宇宙线分布时在时间尺度上受到限制(视实验探测器数据统计量大小而定).最后,对比了这2种方法各自的优缺点.
刘茂元崔树旺李桃丽李艳荣陈天禄张亮
关键词:宇宙线各向异性分析方法
中意合作ARGO-YBJ实验成果
2013年
文章简要介绍了西藏羊八井中意合作ARGo~YBJ实验,重点概述了该实验自2006年7月稳定运行以来在甚高能v天文、宇宙线物理等方面取得的代表性成果。
陈天禄刘茂元厉海金单增罗布
关键词:宇宙线
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