ICRC2015

Water quality monitoring and measurement for the LHAASO-WCDA with the cosmic muon signals

30 Jul 2015, 15:30

1h

Mississippi Foyer (World Forum)

Board: 116

Poster contribution GA-IN Poster 1 GA

Speakers

Dr Bo Gao (Institute of High Energy Physics, CAS)Prof. Chunxu Yu (School of Physics, Nankai University)Dr Hanrong Wu (Institute of High Energy Physics, CAS)Mr Huicai Li (School of Physics, Nankai University)Dr Mingjun Chen (Institute of High Energy Physics, CAS)Ms Xiaojie Wang (Institute of High Energy Physics, CAS)Prof. Zhiguo Yao (Institute of High Energy Physics, CAS)

Description

The Large High Altitude Air Shower Observatory (LHAASO) project is to be built at Daocheng, Sichuan Province, 4400 m a.s.l., in a few years. As one of the major components of the LHAASO project, LHAASO-WCDA, a water Cherenkov detector array with an area of 90000 m2, contains around 400,000 tons of purified water. To gain full knowledge of the water Cherenkov technique and to investigate the engineering issues, a 9-cell detector array has been built at the Yang-Ba-Jing site. With the array, a method of water quality monitoring and measurement with cosmic muon signals is studied, whose results show that a precision at some ten percentages can be achieved, satisfying the requirement of the experiment. The results are compared with those from a full Monte Carlo simulation. This method is proposed to be applied in the LHAASO-WCDA project.