Atomic Magnetometer and Magnetic Field Imaging System

A technology of atomic magnetic strength and magnetic field, which is applied in the field of precision measurement equipment, can solve the problems of low detection accuracy of atomic magnetometer, influence on system stability, fluctuation of hot air flow, etc., and achieve easy system integration, simple structure, and avoid magnetic field noise The effect of the introduction

Active Publication Date: 2021-11-23
TSINGHUA UNIV
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Problems solved by technology

Hot air heating requires an external air source, which will generate certain thermal fluctuations and affect system stability
The electric heating method will inevitably introduce certain magnetic field noise due to the heating current and the residual magnetism of the metal material.
Therefore, the heating method of the traditional atomic magnetometer will still introduce interference factors, which will interfere with the magnetic field, resulting in low detection accuracy of the atomic magnetometer

Method used

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  • Atomic Magnetometer and Magnetic Field Imaging System
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  • Atomic Magnetometer and Magnetic Field Imaging System

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Embodiment Construction

[0025] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the application are given in the drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application.

[0027] It can be understood that the terms "first", "second" and the like used in this application may be...

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Abstract

The present application relates to an atomic magnetometer and a magnetic field imaging system. The first wavelength laser and the second wavelength laser are formed by a laser light source and a frequency doubling module. The optical power of the first-wavelength laser is adjusted through the optical attenuation module to realize the non-magnetic optical heating of the atomic gas chamber, and the attenuation is adjusted to control the temperature. The laser light of the second wavelength enters the atomic gas chamber to realize the magnetic field detection. Therefore, the atomic magnetometer does not need to couple the heating laser and the pumping laser, and can realize non-magnetic heating and atomic pumping detection, which reduces the complexity of the optical path. In the magnetic field imaging system, a laser light source is connected with multiple atomic magnetometer probes. Through the position information of multiple atomic magnetometer probes and the detected magnetic field information, the accurate positioning of the magnetic field position can be realized, so as to realize the multi-dimensional magnetic field space reconstruction.

Description

technical field [0001] The application relates to the technical field of precision measuring equipment, in particular to an atomic magnetometer and a magnetic field imaging system. Background technique [0002] An atomic magnetometer is a sensor that precisely measures weak magnetic fields. Because the working conditions of the atomic magnetometer do not require an ultra-low temperature environment and have extremely high magnetic sensitivity, in the field of weak magnetic detection, it has gradually become an extremely weak magnetic detection method comparable to superconducting quantum interference devices. The atomic magnetometer has advantages in system volume, distance from the measured body, power consumption, etc. It can be used in the field of heart and brain magnetic imaging. It has important application value in the evaluation of children's heart and brain health. [0003] There are many working modes of the atomic magnetometer. The basic principle is to use ligh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/032
CPCG01R33/032
Inventor 冯焱颖李晓杰
Owner TSINGHUA UNIV
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