Non-uniform heating method for alkali metal gas chamber based on finite element analysis

Abstract

The invention relates to a non-uniform heating method for an alkali metal gas chamber based on finite element analysis. According to the characteristic that the alkali metal gas chamber is unsymmetrical in structure, a finite element analysis method is adopted to calculate the optimum heating temperature of a heating membrane adhered to the outer surface of an oven, and the inner temperature fielddistribution of the alkali metal gas chamber is uniform by applying the heating condition, so that more uniform atomicity density distribution is obtained. According to the method, the uniformity ofthe inner temperature field distribution of the alkali metal gas chamber under the measurement conditions of multiple positions of an atmospheric air chamber can be greatly improved, so that the uniformity in detecting a detection signal is improved. Compared with a hot air heating method, according to the method provided by the invention, the heating efficiency can be greatly improved; and compared with a traditional electrical heating manner, the method provided by the invention can achieve a heating effect with more uniform temperature filed distribution. The heating method can provide a reference for the application of atom magnetometers for measurement of the multiple positions of the atmospheric air chamber in the measurement field of biological magnetic fields.

Description

technical field [0001] The invention relates to a non-uniform heating method for an alkali metal gas chamber based on finite element analysis, which can be used for heating the alkali metal gas chamber of an atomic magnetometer to obtain a more uniform temperature field distribution of the alkali metal gas chamber. Background technique [0002] Alkali metal gas chamber is an important sensitive device of atomic magnetometer. Since the atomic number density distribution inside the alkali metal gas chamber is directly related to the temperature, in the case of atmospheric chamber and multi-site measurement, the uniformity of the atomic number density distribution will directly affect the uniformity of the multi-site magnetic field sensing signal. affect the quality of the measured signal. Therefore, under the premise of ensuring the heating efficiency, it is of great significance to improve the uniformity of the temperature field distribution of the alkali metal gas chamber i...

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Problems solved by technology

[0005] The problem to be solved by the present invention is: aiming at the problem of non-uniform distribution of the temperature field inside the heating gas chamber caused by non-magnetic electric heating under the condition of isothermal heating of multiple heating films, to provide a method to ensure high heating efficiency of the alkali metal gas chamber A heating method that obtains a more uniform heating temperature field distribution inside the premise

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