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Ji Fang, Zhang Jianxin, Chen Mingjun, Li Huicai. Water Quality Monitoring Analysis Based on WCDA[J]. Astronomical Research and Technology, 2020, 17(2): 252-257.
Citation: Ji Fang, Zhang Jianxin, Chen Mingjun, Li Huicai. Water Quality Monitoring Analysis Based on WCDA[J]. Astronomical Research and Technology, 2020, 17(2): 252-257.

Water Quality Monitoring Analysis Based on WCDA

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  • Received Date: November 03, 2019
  • Revised Date: November 28, 2019
  • Available Online: November 20, 2023
  • The Water Cherenkov Detector Array (WCDA) is one of the main detectors of the High Altitude Cosmic Ray Observatory (LHAASO), with water as the only detection medium, the water transparency will directly affect the detection efficiency of Cherenkov Light. In order to ensure the realization of WCDA physical goals, the real-time measurement and monitoring of water attenuation length is very vital, which is one of the key tasks for the normal operation and calibration of the detector. In this experiment, the working principle of water attenuation length measuring device and ultraviolet-visible spectrophotometer is introduced, and various samples of water are measured by different wavelength LED, and the data results of the two methods are compared and analyzed. The measurement errors of the two devices are found to be 0.22m and 0.18m, the corresponding relationship between industrial index absorbance and water attenuation length of scientific research index is found, and a Querry water quality model for the GEANT4 simulation is established by simulation, which further promotes the realisation of simulation. Through the verification of WCDA No.1 water attenuation measuring device and the data study of water quality monitoring from water injection to stable operation, a set of stable and reliable water quality monitoring scheme is summarized, which provides a lot of help for the monitoring work of No.2 and No.3 water pools.
  • [1]
    中国科学院高能物理研究所, 中国科学院基础研究局. 西藏羊八井宇宙线国家野外观测研究站的建设、运行与发展[J]. 中国科学院院刊, 2010(4):461-464.
    [2]
    曹臻, 刘加丽, 白云翔. 物理学中的世纪难题:高能宇宙线的起源之"谜"[J]. 自然杂志, 2009, 31(6):342-347, 363.
    [3]
    曹臻, 陈明君, 陈松战, 等. 高海拔宇宙线观测站LHAASO概况[J]. 天文学报, 2019, 60(3):1-16.
    [4]
    AMAT F, BIZOUARD P, BRYANT J, et al. Measuring the attenuation length of water in the CHIPS-M water Cherenkov detector[J]. Nuclear Instruments and Methods in Physics Research Section A:Accelerators Sepctrometers Detectors and Associated Equipment, 2017, 844:108-115.
    [5]
    路浩奇. 大亚湾反符合水切伦科夫探测器及其模型研究[D]. 北京:中国科学院研究生院, 2009.
    [6]
    JONES B J P, CHIU C S, CONRAD J M, et al. A measurement of the absorption of liquid argon scintillation light by dissolved nitrogen at the part-per-million level[J]. Journal of Instrumentation, 2013, 8(7):1-19.
    [7]
    ZUO X, XIAO G, FENG S H, et al. Design and performances of prototype muon detectors of LHAASO-KM2A[J]. Nuclear Instruments and Methods in Physics Research Section A:Accelerators, Spectrometers, Detectors and Associated Equipment, 2015, 789:143-149.
    [8]
    LI C, XIAO G, FENG S H, et al. An apparatus to measure water optical attenuation length for LHAASO-MD[J]. Nuclear Instruments and Methods in Physics Research Section A:Accelerators, Spectrometers, Detectors and Associated Equipment, 2018, 892:122-126.
    [9]
    LI H C, YAO Z G, YU C X, et al. A method to monitor and measure the water transparency in LHAASO-WCDA using cosmic muon signals[J]. Chinese Physics C, 2017, 41(2):145-152.
    [10]
    LI H C, YAO Z G, CHEN M J, et al. Study on single-channel signals of water Cherenkov detector array for the LHAASO project[J]. Nuclear Instruments and Methods in Physics Research Section A:Accelerators, Spectrometers, Detectors and Associated Equipment, 2017, 854:107-112.
    [11]
    STEVE J, SCOTT P. Optical absorption of water compendium[DB/OL].[2019-11-04]. http://omlc.org/spectra/water/abs/index.html.

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