An integrated measurement device for magnetic field and microwave field based on serf magnetometer

Abstract

The invention relates to a magnetic field and microwave field integrated measurement device based on a SERF magnetometer, which includes a processor, a first excitation component, a first signal acquisition component, and an atomic gas chamber filled with alkali metal atoms. First, the first excitation component Exciting the alkali metal atoms in the atomic gas chamber from the ground state to the Rydberg state, then, when the microwave to be detected changes the atomic absorption spectrum of the alkali metal in the Rydberg state, the first signal acquisition component acquires the spectral signal, and finally , the processor is used to calculate the field strength of the microwave to be detected according to the spectral signal. Utilizing the quantum coherence characteristics of Rydberg atoms has the advantage that it is far superior to the traditional dipole moment antenna in measuring the field strength of microwaves, and can make the measurement accuracy reach the order of uV / cm. Using the SERF magnetometer system can be compared with the traditional magnetometer Higher precision, realize the magnetic field measurement range of fT level. Using the same alkali metal atomic gas cell, adding pump light in another direction, combined with the advantages of SERF magnetometer, the simultaneous measurement of high-precision magnetic field and microwave field is realized.

Description

technical field [0001] The invention relates to the technical field of precision measurement, in particular to a magnetic field and microwave field integrated measurement device based on a SERF magnetometer. Background technique [0002] Electromagnetic field measurement is one of the most important physical parameters in precision measurement science. Among them, the weak magnetic field measurement in the electromagnetic field measurement has important application value in the fields of resource exploration, magnetic material detection, biomedicine and aerospace. [0003] Compared with traditional Hall effect sensors and fluxgate magnetometers, SERF magnetometers have the advantages of high sensitivity, small size, and low cost. The SERF magnetometer utilizes the atomic spin in the atomic gas chamber to maintain ultra-high coherence, and has abnormal sensitivity to the magnetic field, and its accuracy of measuring the magnetic field can reach the fT level. [0004] The mi...

AI Technical Summary

Problems solved by technology

At present, the measurement of high-precision microwave mainly relies on traditional dipole antenna measurement, and the measurement accuracy is difficult to reach the uV / cm level.

Images