Improving the discrimination capability of heavy nuclei based on direct Cherenkov light

Improving the discrimination capability of heavy nuclei based on direct Cherenkov light
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基于直接切伦科夫光提高重核辨别能力

DOI:
10.1016/j.astropartphys.2018.06.004
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发表时间:
2018-12
影响因子:
3.5
通讯作者:
Liqiao Yin
Liqiao Yin
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
LiTao Zhao;Lingling Ma;Shoushan Zhang;Baiyang Bi;Liqiao Yin

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精确测量宇宙线的单个种类对于解决宇宙线起源问题具有重要意义。能量> 100 TeV的CR谱只能通过探测地面上广泛的空气簇射来评估。因此,确定CR的主要成分高度依赖于强子相互作用模型。在大气中的第一次相互作用之前,由CR的主要成分发射的直接切伦科夫光(DC光)可以用于识别这样的主要成分。直流光的强度与CRs主分量电荷的平方成正比,与强子相互作用模型无关。在这项研究中,我们调查的直流光的特性和它的能力,以区分重核(铁和MgAlSi)从CR组件使用宽视场切伦科夫望远镜阵列的大型高空空气簇射天文台(LHAASO-WFCTA)在50 TeV和500 TeV之间的能量范围。结果表明,直流光可以用于LHAASO,以提高重建精度的CR重成分。
The accurate measurement of individual species of cosmic rays (CRs) is very important to solve the problem of their origin. CR spectra with energies > 100 TeV can be evaluated only by detecting extensive air showers on the ground. Thus, identifying the primary components of CRs depends highly on hadronic interaction models. Direct Cherenkov light (DC-light) emitted by the primary components of CRs prior to first interaction in the atmosphere can be used to identify such primary components. The intensity of DC-light is proportional to the square of the charge of CRs primary components and independent of the hadronic interaction model. In this study, we investigate the characteristics of DC-light and its ability to discriminate heavy nuclei (iron and MgAlSi) from CR components by using the Wide Field-of-view Cherenkov Telescope Array of the Large High-Altitude Air-Shower Observatory (LHAASO-WFCTA) in the energy range between 50 TeV and 500 TeV. Results suggest that DC-light can be used in the LHAASO to improve the reconstruction accuracy of CR heavy components.
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