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We report here a portable and robust home-built atom gravimeter (USTC-AG11) continuously working in a seismic station in Zhaotong, Yunnan, for over five months. Based on the principle of matter-wave interference, the atom gravimeter is very sensitive to the local gravity and reaches the precision of micro-Gal (110^-8m/s^2) level. With the technique of vibrational compensation, the sensitivity of the atom gravimeter reaches 380. 16em{0ex}Gal/Hz, the overall noise level is suppressed by 80% compared to the no-vibration-compensation method, and 95% of the vibration noise is effectively suppressed. The design of the atom gravimeter in the electronics and laser optics, especially the laser frequency and phase auto-relock technology, guarantees long-term continuous running. The long-term precision of the atom gravimeters is better than 20. 16em{0ex}Gal, which is comparable to the best classical gravimeter FG-5 (X). Our work provides an application for the high-precision atomic gravimeter based on modern quantum sensing technology in the field of geophysics and geodesy survey.
Li et al. (Mon,) studied this question.
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