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Static magnetic field spatial distribution measuring system and method based on atomic magnetic resonance

A technology of spatial distribution and measurement system, applied in measurement devices, measurement of magnetic variables, instruments, etc., can solve problems such as difficult modulation of pulsed circularly polarized light, and achieve the effect of improving spatial resolution, reducing requirements, and simplifying the calculation process

Active Publication Date: 2020-04-17
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology

However, pulsed circularly polarized light that meets the requirements is difficult to modulate and can only detect transient magnetic field information

Method used

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  • Static magnetic field spatial distribution measuring system and method based on atomic magnetic resonance

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Embodiment 1

[0038] A static magnetic field spatial distribution measurement system based on atomic magnetic resonance, including laser 1, optical filter 2, polarizer 3, 1 / 4 wave plate 4, beam expander lens 5, collimator lens 6, four-layer magnetic shield 7 , heating furnace 8, alkali metal atomic gas chamber 9, coil 10, radio frequency field 11, photoelectric signal detector array 12;

[0039] Laser light 1 sequentially passes through optical filter 2, polarizer 3, 1 / 4 wave plate 4, beam expander lens 5, and collimator lens 6, and then enters photoelectric signal detector array 12 after passing through four-layer magnetic shield 7; coil 10 In the four-layer magnetic shield 7, the heating furnace 8 is in the coil 10, and the alkali metal atomic gas chamber 9 is in the heating furnace 8; the four-layer magnetic shield 7 is within the radio frequency field 11;

[0040] The alkali metal atom gas cell 9 is filled with alkali metal atoms.

[0041] The alkali metal atom gas chamber 9 is made of...

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Abstract

A small-scale space static magnetic field space distribution measuring method based on atomic magnetic resonance is used for measuring the space distribution uniformity of a static magnetic field, andadopts the basic principle that an atomic air chamber filled with alkali metals (K, Rb, Cs and the like) is placed in the static magnetic field, and circularly polarized light is selected to polarizeatoms of the alkali metals (K, Rb, Cs and the like). A radio frequency field perpendicular to the static magnetic field is adopted to enable alkali metal (K, Rb, Cs and the like) atoms to be subjected to magnetic resonance, a photoelectric detector array detects the light intensity of the circularly polarized light penetrating through a gas chamber, and the static magnetic field intensity is obtained according to the Larmor precession frequency of the alkali metal (K, Rb, Cs and the like) atoms. The spatial position of the circularly polarized light is changed through a spatial light modulator, or magnetic field intensity distribution measuring in a small-scale space is realized by adopting the photoelectric detector linear array.

Description

technical field [0001] The invention relates to a static magnetic field spatial distribution measurement system and method based on atomic magnetic resonance, belonging to the technical field of static magnetic field distribution. Background technique [0002] In many technical fields and scientific research work, it is necessary to use the spatial distribution information of the magnetic field, and with the development of medicine, electromagnetism, biology and other fields, it is particularly important to determine the microscopic magnetism in the research object, so the development of small-scale space The static magnetic field spatial distribution measurement technology has important application value. [0003] Small-scale spatial magnetic field measurement is a technique for measuring the magnetic field distribution at the microscopic scale. Currently representative technologies can be divided into: scanning superconducting quantum interference technology, diamond colo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/10
CPCG01R33/10
Inventor 刘院省王巍范晓婷阚宝玺王学锋
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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