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EARTHQUAKE ›› 2016, Vol. 36 ›› Issue (3): 46-54.

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A New Calibration Method of Emanometer in Earthquake Monitoring

REN Hong-wei1,2, YAO Yu-xia3, HUANG Ren-gui4, CHEN Lan-qing5, WANG Gui-qing6   

  1. 1. Key Laboratory of Crustal Dynamics, Institute of Crustal Dynamics, CEA, Beijing 100085 China;
    2. Institute of Geophysics, CEA, Beijing 100081 China;
    3. Pingliang Central earthquake Station, Gansu Earthquake Administration, Gansu Pingliang, 744000 China;
    4. Jiujiang Earthquake Station, Jiangxi Earthquake Administration, Jiangxi Jiujiang, 332005, China;
    5. Gansu Earthquake Administration, Gansu Lanzhou 730000, China;
    6. China Earthquake Networks Center,Beijing 100045, China
  • Received:2016-02-17 Published:2020-07-03

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Abstract: By using AlphaGUARD radon measurement instrument, the international calibration reference device, we carried out a dissolved radon calibration experiment to replace the general calibration by solid source of radon gas. The three scintillation chambers (1 #, 3 # and 5 #) of FD-125 emanometer are calibrated respectively, and then are compared with the results of using solid source of radon gas. The results show that the error of k value using “dissolved radon calibration” relative to using solid source of radon gas were respectively 5.06%, 1.92% and 2.76%. The above results indicate that the newly developed calibration method instead of traditional solid source of radon gas accords with the radon observation technology requirement in earthquake monitoring system, and can solve difficulty in transportation and high technical maintenance requirements in the calibration using solid source of radon gas. It is the trend of radon calibration technology development in the future.

Key words: FD-125 emanometer, AlphaGUARD emanometer, Scintillation chamber, Radon source calibration

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