A gravimeter based on the interweaving effect of two-component atoms
A gravimeter, two-component technology, applied in the field of gravity survey, can solve the problems of reduced interference fringe ratio, difficulty in greatly improving sampling rate and measurement accuracy, etc., to achieve the effect of increasing sampling rate, improving measurement sensitivity, and eliminating dead time
Active Publication Date: 2022-07-19
INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS
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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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Embodiment 1
[0039] like figure 1 As shown, a gravimeter based on the interweaving interference effect of two-component atoms includes a vacuum container 1, a three-dimensional magneto-optical trap 8 is arranged in the vacuum container 1, a pair of anti-Helmholtz coils 2 outside the vacuum container 1, cooling light The three-dimensional magneto-optical trap 8 is incident, the vacuum vessel 1 is connected to the vacuum pump 7, the vacuum vessel 1 is also connected to the two-dimensional magneto-optical trap 4 through the differential tube 10, and the vacuum vessel 1 is also connected to the vertical vacuum tube 11. The vertical vacuum tube 11 is in order from bottom to top. The detection area and the interference area, the detection light is incident on the detection area, and the Raman light is incident on the interference area.
[0040] The basic processes of atomic interference technology include the trapping and up-throwing of atomic groups, the preparation of the initial state of atom...
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The invention discloses a gravimeter based on the interweaving interference effect of two-component atoms, comprising a vacuum container, a three-dimensional magneto-optical trap is arranged in the vacuum container, a pair of anti-Helmholtz coils outside the vacuum container, and cooling light incidents three-dimensional magneto-optical The trap, the vacuum container is connected with the vacuum pump, the vacuum container is also connected with the two-dimensional magneto-optical trap through the differential tube, and the vacuum container is also connected with the vertical vacuum tube. The vertical vacuum tube is the detection area and the interference area from bottom to top. Mann light incident interference region. The invention can realize absolute gravity measurement with no dead time, high sampling rate and high sensitivity.
Description
technical field [0001] The invention belongs to the technical field of gravity surveying, and particularly relates to a gravimeter based on the interweaving interference effect of two-component atoms. Background technique [0002] Gravity is the resultant force of the universal gravitational force of an object and the earth and the centripetal force generated by the rotation of the earth. It is a very important physical constant in metrology. Different from other physical constants, the absolute gravity value is different at different places and at different heights. The gravity value at the same place at different times is also changing. 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 seismic and geophysical research, environmental monitoring such as groundwater, resource expl...
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IPC IPC(8): G01V7/00G01V7/02
CPCG01V7/00G01V7/02
Inventor 汤彪黄攀威朱皓冉周林陈曦仲嘉琪熊宗元王谨詹明生
Owner INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS