标题：YAC sensitivity for measuring the light-component spectrum of primary cosmic rays at the "knee" energies
作者：Zhai, L.M. ;Huang, J. ;Chen, D. ;Shibata, M. ;Katayose, Y. ;Zhang, Ying ;Chen, Xu ;Hu, X.B. ;Lin, Y.H. ;Jin, H.B.
作者机构：[Zhai, L.M. ;Huang, J. ;Zhang, Ying ;Chen, Xu ;Hu, X.B. ;Lin, Y.H. ] Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chines 更多
会议名称：34th International Cosmic Ray Conference, ICRC 2015
会议日期：30 July 2015 through 6 August 2015
来源：Proceedings of Science
摘要：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 YAC-II consisting of 124 detectors has been constructed and operated at Yangbajing (4300 m a.s.l.) in Tibet since February 2014. The YAC-II has been placed near the center of the Tibet-III AS array and operates together with Tibet-III and a large underground water-Cherenkov muon-detector array (MD). In this paper, we have performed a detailed Monte Carlo simulation to check the sensitivity of YAC-II+Tibet- III+MD array to the light components in the primary cosmic rays around the knee energies, taking account of the observation conditions of actual YAC-II+Tibet-III+MD array. We have checked the sensitivity of YAC to the hadronic interaction models (QGSJET01c and SIBYLL2.1) and primary cosmic-ray composition models ('He-poor', 'He-rich' and 'Gaisser-fit') around the knee using the high-energy core events observed by the YAC-II+Tibet-III+MD array, and the capability of the measurement of the light-chemical components (proton, helium) with the new Tibet hybrid experiment is investigated. 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.