Method for measuring alkali metal atomic polarizability of nuclear magnetic resonance gyro in real time

Abstract

The invention provides a method for measuring alkali metal atomic polarizability of a nuclear magnetic resonance gyro in real time and belongs to the field of atomic physics. The method includes: measuring alkali metal atomic densities of an atomic pool at different temperatures, measuring atomic nuclear magnetic resonance frequency of inert gas caused by polarization of alkali metal atoms, and thus acquiring polarizability of the alkali metal atoms in the atomic pool without changing the optical path structure of the nuclear magnetic resonance gyro and the magnetic field environment; building a three-dimensional model of changes in nuclear magnetic resonance frequency of the inert gas in the atomic pool along with temperature and the alkali metal atomic polarizability, measuring the frequency shift of atomic NMR (nuclear magnetic resonance) of the inert gas at any temperature point while the nuclear magnetic resonance frequency normally runs, and thus calculating the polarizability of the alkali metal atoms in the atomic pool in real time. The method has the advantages that the method is simple, no influence is caused to the optical path structure of the nuclear magnetic resonance gyro and the method is of great significance to improving the performance of the nuclear magnetic resonance gyro.

Description

technical field [0001] The invention relates to a method for measuring the polarizability of an atomic nuclear magnetic resonance gyro (Nuclear Magnetic Resonance Gyro, or NMRG) alkali metal. The nuclear magnetic resonance frequency of the inert gas atom acting together can obtain the polarizability of the alkali metal atom in real time, which belongs to the field of atomic physics. Background technique [0002] In recent years, with the development of quantum theory, atomic manipulation, micro-processing technology and modern optics, atomic sensors have been more and more widely used in modern science and technology, from the study of the human brain (magnetic resonance imaging) to the movement They can be found in navigation-level precise measurements of objects (nuclear magnetic resonance gyroscopes). More and more institutions at home and abroad have also carried out research on sensors such as atomic accelerometers, atomic magnetometers, and atomic nuclear magnetic res...

AI Technical Summary

Problems solved by technology

[0019] The present invention aims at the defect that the prior art cannot measure the polarizability of the alkali metal atoms in the atomic pool in real time when the atomic nuclear magnetic resonance gyroscope is working normally, and proposes a real-time measurement of alkali by measuring the nuclear magnetic resonance frequency of the inert gas atoms in the atomic pool of the atomic nuclear magnetic resonance gyroscope metal atomic polarizability method

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