Satellite-borne cold atom imprisoning-type acceleration measurement method

Abstract

Disclosed is a satellite-borne cold atom imprisoning-type acceleration measurement method. Alkali metal atoms are filled in a three-dimensional magnetic-optical trap, the three-dimensional magnetic-optical trap emits a beam of alkali metal atoms to the space, the alkali metal atoms are stopped by an oncoming laser beam and are introduced to central points of the laser beam and a magnetic field, the central point of the laser beam, the central point of the magnetic field and the mass center of a satellite coincide, and the intensity of the laser beam and the magnetic field is controlled to enable the position of a cold atom to be kept in the position of the mass center of the satellite. In the operation process of the satellite, when the action force on the satellite and the action force on the cold atom are different, the cold atom deviates from the mass center of the satellite, so that the control force of the laser and the magnetic field is changed, and corresponding control force of the laser and the magnetic field are applied to enable the cold atom to be back to position of the mass center. The variation of the control force of the laser and the magnetic field in the operation process of the satellite in the third step is measured, and acceleration of the cold atom relative to the mass center of the satellite, namely the acceleration of non-inertia force on the satellite is calculated. The satellite-borne cold atom imprisoning-type acceleration measurement method has the advantages of being high in measurement accuracy, high in engineering feasibility and simple in operation.

Description

technical field [0001] The invention relates to the field of satellite gravity field measurement, in particular to a satellite-borne cold atom trapped acceleration measurement method. Background technique [0002] Carrying out satellite gravity field measurement can directly obtain detailed data of the earth's gravitational acceleration at a height of 250~500Km in space, and the results can be applied to almost all fields of geosciences. Using satellite gravity measurement to accurately determine the mid- and long-wave Earth's gravity field will play a huge role in scientific research and engineering applications in the field of geology, so it has important scientific significance. [0003] The launch of a dedicated gravimetric satellite to measure the global gravitational field is a sign that geodetic gravity enters the 21st century. In addition to the influence of the earth's gravity and the gravity of the sun and the moon, the perturbation of the gravity measurement sate...

AI Technical Summary

Problems solved by technology

[0020] To sum up the above background technology, the acceleration measurement solution that has been successfully verified on orbit - the electrostatic levitation accelerometer, due to the difficulty in processing the mass block and the capacitor plate, it is difficult to improve the accuracy of the acceleration measurement

Although the acceleration measurement method based on cold atom interferometry has been technically verified on the ground and has high precision, the engineering feasibility of the cold atom ejection method is limited due to the different force characteristics of cold atoms on the ground and in space.

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