Sensitivity of YAC to measure the light-component spectrum of primary cosmic rays at the 'knee' energies
Sensitivity of YAC to measure the light-component spectrum of primary cosmic rays at the 'knee' energies
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DOI：
10.1088/0954-3899/42/4/045201
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发表时间：
2015-04
期刊：
影响因子：
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通讯作者：
L. Zhai;J. Huang;D. Chen;M. Shibata;Y. Katayose;Ying Zhang;J. Liu;Xu Chen;X. B. Hu;Y. H. Lin
中科院分区：
文献类型：
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作者：
L. Zhai;J. Huang;D. Chen;M. Shibata;Y. Katayose;Ying Zhang;J. Liu;Xu Chen;X. B. Hu;Y. H. Lin
研制了一种新的空气簇射芯探测器阵列（YAC：羊八井空气簇射芯探测器阵列），用于测量中国西藏“膝”能的初级宇宙线成分，主要侧重于光成分。由16个探测器组成的原型实验（YAC-1）已在羊八井（海拔4300 m）建成并运行。自2009年5月以来，西藏。YAC-I安装在Tibet-III AS阵列中并一起运行。本文结合YAC-Ⅰ + Tibet-III阵列的实际观测条件，对YAC-Ⅰ + Tibet-III阵列对膝能附近宇宙线中宇宙线光分量的灵敏度进行了蒙特卡罗模拟。利用人工神经网络进行了光成分的选择。模拟结果表明，用本文方法估计的光成分光谱可以很好地再现输入光谱，误差在10%以内，但存在约30%的系统误差，主要是由所用的主模型和相互作用模型引起的。结果表明，全尺寸YAC和Tibet-III阵列对于研究宇宙线成分，特别是获得膝能附近质子和氦核的能谱是非常有效的。
A new air-shower core-detector array (YAC: Yangbajing air-shower Core-detector array) has been developed to measure the primary cosmic-ray composition at the `knee' energies in Tibet, China, focusing mainly on the light components. The prototype experiment (YAC-I) consisting of 16 detectors has been constructed and operated at Yangbajing (4300 m a.s.l.) in Tibet since May 2009. YAC-I is installed in the Tibet-III AS array and operates together. In this paper, we performed a Monte Carlo simulation to check the sensitivity of the YAC-I+Tibet-III array to the cosmic-ray light component of cosmic rays around the knee energies, taking account of the observation conditions of the actual YAC-I+Tibet-III array. The selection of light component from others was made by use of an artificial neural network. The simulation shows that the light-component spectrum estimated by our methods can well reproduce the input ones within 10% error, and there will be about 30% systematic errors mostly induced by the primary and interaction models used. It is found that the full-scale YAC and the Tibet-III array is powerful to study the cosmic-ray composition, in particular, to obtain the energy spectra of protons and helium nuclei around the knee energies.