A Method To Monitor And Measure The Water Transparency In LHAASO-WCDA Using Cosmic Muon Signals
Abstract
The Large High Altitude Air Shower Observatory (LHAASO) is to be built at Daocheng, Sichuan Province, China. As one of the major components of the LHAASO project, a Water Cherenkov Detector Array (WCDA), with an area of 78000 m2, contains 350000 tons of purified water. The water transparency and its stability are critical for successful long-term operation of this project. To gain full knowledge of the water Cherenkov technique and investigate the engineering issues, a 9-cell detector array has been built at the Yangbajing site, Tibet, China. With the help of the distribution of single cosmic muon signals, the monitoring and measurement of water transparency are studied. The results show that a precision of several percent can be obtained for the attenuation length measurement, which satisfies the requirements of the experiment. In the near future, this method could be applied to the LHAASO-WCDA project.
Recommended Citation
H. C. Li and Z. G. Yao and C. X. Yu and M. J. Chen and H. R. Wu and M. Zha and B. Gao and X. J. Wang and J. Y. Liu and W. Y. Liao, "A Method To Monitor And Measure The Water Transparency In LHAASO-WCDA Using Cosmic Muon Signals," Chinese Physics C, vol. 41, no. 2, article no. 026002, IOP Publishing; Chinese Physical Society, Feb 2017.
The definitive version is available at https://doi.org/10.1088/1674-1137/41/2/026002
Department(s)
Physics
Keywords and Phrases
cosmic muon; LHAASO-WCDA; water Cherenkov; water transparency
International Standard Serial Number (ISSN)
1674-1137
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2025 The Authors, All rights reserved.
Publication Date
01 Feb 2017
Comments
National Natural Science Foundation of China, Grant 11375224