Novel radio frequency atom magnetometer and implementation method thereof

Abstract

The invention discloses a novel radio frequency atom magnetometer and an implementation method thereof. According to the invention, the method comprises the steps: enabling the laser wavelength to bestable, and keeping resonance between the laser wavelength and the alkali metal atom ground state energy level; enabling a polaroid to be perpendicular to the direction of the laser beam to change laser into linearly polarized laser; enabling the linearly polarized laser to pass through the atomic gas chamber and to be received by the photoelectric detector, wherein the direction of the linearly polarized laser is parallel or vertical to the direction of the to-be-measured alternating magnetic field; enabling the static magnetic field to be stable and unchanged, wherein the direction is parallel to the linear polarization laser direction, and the radio frequency field direction is perpendicular to the to-be-measured alternating magnetic field direction; enabling the photoelectric detectorto detect the light intensity value change of all the linearly polarized lasers passing through the atomic gas chamber and outputting a voltage value, collecting the voltage value through the feedbackcontroller, and performing feedback control on the signal generator, so that the absolute value of the difference between the radio frequency field frequency and the to-be-measured alternating magnetic field frequency is equal to the Larmor precession frequency of alkali metal atoms; and calculating the frequency and the magnetic induction intensity of the to-be-measured alternating magnetic field according to the magnetic resonance spectrum. The method has the advantages of simple operation and large measurement range.

Description

technical field [0001] The invention belongs to the field of magnetic field measurement, and relates to a novel radio-frequency atomic magnetometer and a realization method thereof, which are used for measuring high-frequency alternating magnetic fields, thereby improving the measurement range of the radio-frequency atomic magnetometer. Background technique [0002] Radio frequency atomic magnetometer is an important branch of atomic magnetometer, mainly used to measure alternating magnetic field, which makes up for the defect that traditional atomic magnetometer can only measure static magnetic field, and makes the application of atomic magnetometer more extensive. At present, the traditional radio frequency atomic magnetometer mainly realizes the measurement of the alternating magnetic field to be measured by adjusting the static magnetic field so that its size and the frequency of the alternating magnetic field to be measured meet a certain proportional relationship. When...

AI Technical Summary

Problems solved by technology

When the frequency of the alternating magnetic field to be measured is high, the traditional radio frequency atomic magnetometer requires a corresponding increase in the size of the static magnetic field, and an excessively large static magnetic field will cause the enhancement of the second-order Zeeman effect of the atom, resulting in the traditional radio frequency atomic magnetometer The sensitivity of the instrument decreases

Therefore, the frequency measurement range of the traditional radio frequency atomic magnetometer to the alternating magnetic field is small, generally less than 1MHz

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