Real-time online atomic density measuring method suitable for atom magnetometer

A technology of atomic magnetic strength and atomic density, which is applied in the fields of density detection, spectral analysis, and optical detection, and can solve problems such as inability to perform accurate density measurement

Active Publication Date: 2016-06-08
SOUTHEAST UNIV
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  • Abstract
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Problems solved by technology

This method and device are only suitable for roughly monitoring the ratio of the alkali metal mixture during processing, and cannot perform accurate density measurement
[0004] At present, there is no public report on the method of directly using the atomic magnetometer device itself to accurately and quickly measure the atomic density inside the alkali metal gas chamber in real time

Method used

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  • Real-time online atomic density measuring method suitable for atom magnetometer
  • Real-time online atomic density measuring method suitable for atom magnetometer
  • Real-time online atomic density measuring method suitable for atom magnetometer

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Embodiment Construction

[0037] Taking the potassium atom magnetometer as an example to specifically illustrate the use of the present invention to measure the atomic density number in the alkali metal gas chamber.

[0038] Such as figure 2 Shown is a real-time online measuring device for atomic density suitable for an atomic magnetometer, which adopts the same structure as the prior art; the measuring method includes the following steps:

[0039] (1) Optical path adjustment and connection: perform fine adjustment and wiring according to the optical path shown in Figure 2;

[0040] (2) System preparation: turn on the electric heating system, and heat the inside of the alkali metal gas chamber to 140°C;

[0041] (3) Start the test: reduce the pumping optical power to 30μW, apply a 3000nT DC magnetic field to the coil in the z direction; the ZI lock-in amplifier outputs a sine wave sweep field with a value of 5nT in the y direction, and the sweep frequency range is 11KHz to 26KHz; at the same time, t...

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Abstract

The invention discloses a real-time online atomic density measuring method suitable for an atom magnetometer. The method comprises the specific steps that an alkali metal air chamber of the atom magnetometer is firstly heated; then the pumping light power is reduced, and a direct-current magnetic field is applied a coil, in the direction z, of the atom magnetometer; then sine wave field sweeping and data collecting of the atom magnetometer in the direction y are completed through a ZI lock-in amplifier; then the output signal of the ZI lock-in amplifier and the magnetic resonance line width of the atom magnetometer are subjected to fitting through a Lorenz curve; finally, the alkali metal atom density of the atom magnetometer is calculated. According to the method, the blank that in the prior art, no fast and effective real-time online atom density measuring method is filled in, and theoretical guidance and reference are provided for improving of the sensitivity of the atom magnetometer.

Description

technical field [0001] The invention aims to propose a real-time on-line measurement method for atomic density suitable for an atomic magnetometer, which belongs to the technical fields of optical detection, spectral analysis and density detection. Background technique [0002] As a basic part, the magnetic field widely exists in nature, and the magnetic field detection device has extremely high research value as a tool to understand the natural foundation. The urgent need for high-sensitivity magnetic field detection devices has prompted the creation and development of ultra-high-sensitivity atomic magnetometers. According to the latest research progress, optically pumped atomic magnetometers have begun to show sensitivity to extremely weak magnetic field detection. [0003] The atomic magnetometer is mainly composed of four major systems: light source system, magnetic shielding and magnetic generation system, heating system, and sensitive meter head (alkali metal gas cham...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/24
CPCG01N9/24
Inventor 陈熙源张红邹升
Owner SOUTHEAST UNIV
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