Status of LHAASO updates from ARGO-YBJ
Status of LHAASO updates from ARGO-YBJ
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DOI：
10.1016/j.nima.2013.12.012
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发表时间：
2014-04
影响因子：
1.4
通讯作者：
Z. Cao
中科院分区：
文献类型：
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作者：
Z. Cao
大型高空空气阵雨天文台（LHAASO）是一个多用途项目，具有复杂的高能伽马射线和宇宙射线探测探测器阵列。1平方公里的阵列由5种探测器组成，分别测量星雨到达方向、次级粒子总数、介子含量、切伦科夫图像和星雨核心附近的高能伽马射线。主要的科学目标是：(1)通过对30 TeV以上的伽马射线源进行广泛的光谱研究，寻找银河系宇宙射线的起源；(2) 300 GeV以上伽玛射线源的全天巡天；(3)宇宙射线的能谱和组成测量，在覆盖膝盖的大范围内，具有固定的能量尺度和已知的低能端所有物种的通量。本文报道了LHAASO实验首次测量到的宇宙射线氢和氦核的能量谱高达0.8 PeV。
The Large High Altitude Air Shower Observatory (LHAASO) is a multipurpose project with a complex detector array for high energy gamma ray and cosmic ray detection. The array of 1 km2is composed of five types of detectors to measure shower arrival direction, total number of secondary particles, muon content, Cherenkov image and high energy gamma rays near shower core, respectively. The main scientific goals are (1) searching for galactic cosmic ray origins by extensive spectroscopy investigations of gamma ray sources above 30 TeV; (2) all sky survey for gamma ray sources at energies higher than 300 GeV; (3) energy spectrum and composition measurements of cosmic rays over a wide range covering knees with fixed energy scale and known fluxes for all species at the low energy end. In this paper, the progress on relevant detector developments is reported, including constructions of prototype detectors at Tibet site and coincidence operation with the ARGO-YBJ resistive plat chamber full coverage array at 4300 m a.s.l. The energy spectrum of cosmic ray hydrogen and Helium nuclei up to 0.8 PeV is reported as the first piece of physics measurements by the LHAASO experiment.