1. The performance of a prototype array of water Cherenkov detectors for the LHAASO project
- Author
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Hong-peng Lu, S. H. Feng, M. M. Ge, L. Zhang, L. M. Zhai, Ye Xu, H. C. Li, Zihuang Cao, Jinchang Liu, Zebo Tang, Jiejia Zhuang, X. J. Bi, S. R. Zhang, Y. T. Chen, K. J. Zhu, M. Shao, S. Z. Chen, Yang Bai, J. Liu, Q. J. Li, C. Y. Wu, Y. J. Mao, L. L. Ma, Q. Y. Yang, Danzengluobu, K. Jiang, R. X. Yang, W. P. Huang, Zhibin Sun, S. Q. Gao, Shaomin Chen, Y. Zhang, Q. An, Z. G. Zhao, J. B. Zhao, S. W. Cui, J. Shao, Q. Wu, C. Hou, Xufang Li, Shenye Liu, Guo-Ming Chen, M. Zha, Xiong Zuo, X. J. Hao, B. K. Zhang, H. R. Wu, H. K. Lv, Guoqing Xiao, C-Q. Li, Qiang Du, F. R. Zhu, Xurong Chen, X. B. Hu, Lei Zhao, B. Z. Dai, M. H. Gu, G. X. Sun, X. H. Ma, T. L. Chen, H. M. Zhang, X. Y. Zhang, Zhiguo Yao, X. H. You, Jinsong Huang, B. Gao, Jinyao Liu, Shengxue Zhang, Yunchao Liu, C. F. Feng, H. H. He, H. Y. Jia, J. F. Chang, H. B. Hu, Bin Zhou, M. J. Chen, X. D. Sheng, F. Y. Li, A. F. Yuan, and Yinong Liu
- Subjects
Physics ,Nuclear and High Energy Physics ,Photomultiplier ,Spectrometer ,business.industry ,Cherenkov detector ,Physics::Instrumentation and Detectors ,Astrophysics::High Energy Astrophysical Phenomena ,Detector ,Gamma ray ,Astrophysics::Instrumentation and Methods for Astrophysics ,WCDA ,Water Cherenkov ,Particle detector ,law.invention ,Prototype array ,Optics ,Observatory ,law ,Angular resolution ,business ,Instrumentation ,LHAASO ,Cherenkov radiation - Abstract
A large high-altitude air-shower observatory (LHAASO) is to be built at Shangri-La, Yunnan Province, China. This observatory is intended to conduct sub-TeV gamma astronomy, and as an important component of the LHAASO project, a water Cherenkov detector array (WCDA) is proposed. To investigate engineering issues and fully understand the water Cherenkov technique for detecting air showers, a prototype array at 1% scale of the LHAASO-WCDA has been built at Yang-Ba-Jing, Tibet, China. This paper introduces the prototype array setup and studies its performance by counting rate of each photomultiplier tube (PMT), trigger rates at different PMT multiplicities, and responses to air showers. Finally, the reconstructed shower directions and angular resolutions of the detected showers for the prototype array are given.
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