Gravimeter based on two-component atom interleaving interference effect

Abstract

The invention discloses a gravimeter based on a two-component atom interleaving interference effect, which comprises a vacuum container, a three-dimensional magneto-optical trap arranged in the vacuum container, a pair of anti-Helmholtz coils arranged outside the vacuum container, and a cooling light incident three-dimensional magneto-optical trap, and is characterized in that the vacuum container is connected with a vacuum pump, and is also connected with a two-dimensional magneto-optical trap through a differential tube; the vacuum container is further connected with a vertical vacuum tube, and the vertical vacuum tube sequentially comprises a detection area, an interference area, a detection light incidence detection area and a Raman light incidence interference area from bottom to top. According to the invention, dead-time-free, high-sampling-rate and high-sensitivity absolute gravity measurement can be realized.

Description

technical field [0001] The invention belongs to the technical field of gravity survey, and in particular relates to a gravimeter based on two-component atomic interweaving interference effect. Background technique [0002] Gravity is the resultant force of the gravitational force between the object and the earth and the centripetal force generated by the earth's rotation, and is a very important physical constant in metrology. Different from other physical constants, the absolute gravity value is different in different places and different heights. The gravity value of the same place is also changing at different times. It will be affected by the earth's solid tide (the distance between the earth and the moon), Changes in ocean tides, atmospheric pressure, geological structure, groundwater, etc. The precise measurement of gravity value is of great significance in scientific research and application fields such as earthquake and geophysics research, groundwater and other env...

AI Technical Summary

Problems solved by technology

For example, when the atoms of a single component interweave and interfere, the stray light generated by the trapping and detection process of the atomic group will cause the atoms in the interference process to produce incoherent photon absorption and emission, resulting in a greatly reduced contrast of the interference fringes, making it difficult to greatly increase the sampling rate and measurement precision

Therefore, there is no related research on atomic interference gravimetry that simultaneously achieves high precision, high sampling rate, and zero dead time.

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