In-situ measurement system and method for spatial distribution of spin polarizability of alkali metal atom magnetometer

A technology of atomic magnetic intensity and spatial distribution, applied in the field of precision measurement, can solve the problems of transient signal distortion, affecting the working state of the magnetic measurement device, unable to realize in-situ measurement of atomic spin polarizability, etc. rational effect

Active Publication Date: 2021-11-12
ZHEJIANG LAB
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Problems solved by technology

However, these methods have certain limitations, or need to apply additional high-intensity magnetic fields, or are only suitable for low-temperature conditions, or have transient signal distortions, which will affect the normal working status of the magnetic measurement device and cannot achieve atomic self-study. In situ measurement of spatial distribution of spin polarizability

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  • In-situ measurement system and method for spatial distribution of spin polarizability of alkali metal atom magnetometer
  • In-situ measurement system and method for spatial distribution of spin polarizability of alkali metal atom magnetometer

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Embodiment Construction

[0020] The present invention will be further described below through the accompanying drawings and specific embodiments.

[0021] like figure 1 As shown, the present invention proposes an in-situ measurement system for the spatial two-dimensional distribution of the spin polarizability of an alkali metal atomic magnetometer, including a detection light laser 1, a detection light laser stabilization system 2, Polarizer 3, plane mirror 4, photoelastic modulator 5, detection light quarter-wave plate 6, alkali metal atomic gas chamber 11, analyzer 19, photodetector 20; and the other direction is pumped The pumping light laser 12, the pumping light laser stabilization system 13, the pumping light beam expander system 14, the polarization beam splitting prism 15, the polarizer 16, the pumping light quarter-wave plate 17, the alkali metal Atomic gas chamber 11, second CMOS sensor 21, another bundle of refracted light of the polarization beam splitter prism 15 enters the first CMOS s...

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Abstract

The invention discloses an in-situ measurement system and method for spatial distribution of spin polarizability of an alkali metal atom magnetometer, and belongs to the technical field of precision measurement. The system is mainly composed of a laser, a laser stabilizing system, a laser beam expanding system, a beam splitting prism, a polarization element, a magnetic shielding system, an alkali metal atom gas chamber, a photoelastic modulator, a photoelectric detector, a CMOS sensor, a data collecting, analyzing and processing system and the like. The system has reasonable theoretical basis and simple experimental operation, no additional system disturbance is brought to normal operation of the magnetic measurement system, the electron polarizability distribution of the working state of the alkali metal atom gas chamber can be accurately measured, the measurement sensitivity of the atom magnetometer can be improved on the basis of the polarizability distribution measurement result, and a basis is provided for development of an ultra-high-sensitivity extremely-weak magnetic measurement device.

Description

technical field [0001] The invention belongs to the technical field of precision measurement, in particular to an in-situ measurement system and method for the spatial distribution of the spin polarizability of an alkali metal atom magnetometer. Background technique [0002] Alkali metal atomic magnetometers based on the spin-free relaxation effect have been widely used in basic physics research, biomagnetic measurements and other frontier fields because of their ultra-high sensitivity potential for magnetic field measurement. The realization of extremely weak magnetic field measurement by atomic magnetometer mainly includes optical pumping and atomic spin precession detection. Optical pumping is the use of polarized laser to change the distribution of electrons outside the nucleus of alkali metal atoms at various energy levels microscopically, so as to realize the macroscopic polarization of atomic spins. Spin polarizability is a physical quantity that characterizes the de...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J9/00G01B11/00
CPCG01J9/00G01B11/00
Inventor 李学文郭强张宁王子轩陆吉玺孙畅
Owner ZHEJIANG LAB
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