A multi-channel gradient magnetic field measurement device based on atomic spin effect

A gradient magnetic field and atomic spin technology is applied in the fields of magnetic field measurement using the principle of magnetic flux control, magnetic gradient measurement, and magnetic field measurement using electromagnetic devices. It can solve problems such as poor flexibility, low sensitivity, and unfavorable miniaturization, and achieve The effect of large baseline length, strong ability to resist external interference, and improved ability to suppress environmental common-mode noise

Active Publication Date: 2021-09-03
BEIHANG UNIV
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Problems solved by technology

[0003] In view of this, the present invention provides a multi-channel gradient magnetic field measurement device based on the atomic spin effect. The technical problem to be solved is: to overcome the shortcomings of the existing magnetic gradient measurement technology such as poor flexibility, low sensitivity, and unfavorable miniaturization. Based on the atomic spin effect, a single beam of probe light can be used to measure the spatial magnetic field. At the same time, there are multiple parallel probe beams inside the device, which can detect the magnetic field at multiple positions in space at the same time. The gradient difference of the magnetic field at different positions is used to realize the spatial gradient. Magnetic field measurement

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  • A multi-channel gradient magnetic field measurement device based on atomic spin effect
  • A multi-channel gradient magnetic field measurement device based on atomic spin effect
  • A multi-channel gradient magnetic field measurement device based on atomic spin effect

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[0020]Below with the accompanying drawings ( Figure 1-Figure 3 ) to illustrate the present invention.

[0021] figure 1 A schematic structural diagram of a multi-channel gradient magnetic field measurement device based on the atomic spin effect for implementing the present invention. figure 2 for figure 1 Schematic diagram of the detection part. figure 2 The optical rotation angles of the elliptically polarized light beams on the left side of the alkali metal atomic gas cell are the same, and the optical rotation angles of the elliptically polarized light beams on the right side of the alkali metal atomic gas cell vary, for example, the optical rotation angle changes from small to large from bottom to top , figure 2 The cross icon in the upper middle circle tilts the most to the right. image 3 for figure 1 Schematic diagram of the system response for the balanced photodetector output. refer to Figure 1 to Figure 3 As shown, a multi-channel gradient magnetic field...

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Abstract

A multi-channel gradient magnetic field measurement device based on the atomic spin effect. The technical problem to be solved is: to overcome the shortcomings of the existing magnetic gradient measurement technology such as poor flexibility, low sensitivity, and unfavorable miniaturization. Based on the atomic spin effect, use A single beam of probe light can realize spatial magnetic field measurement. At the same time, there are multiple parallel probe beams inside the device, which can detect magnetic fields at multiple positions in space at the same time, and realize the measurement of spatial gradient magnetic field through gradient difference of magnetic fields at different positions.

Description

technical field [0001] The invention relates to atomic magnetometer / gradiometer technology, in particular to a multi-channel gradient magnetic field measurement device based on atomic spin effect. Background technique [0002] With the continuous development of quantum technology and laser technology, the magnetic field measurement technology based on quantum spin ensemble control has developed rapidly and has been widely used in various fields, including: deep space and deep geomagnetic anomaly detection, mineral exploration, biological extremely weak magnetic field measurement etc. Among them, biological extremely weak magnetic measurement, such as heart and brain magnetic measurement, muscle magnetic measurement, cell measurement, etc., has great research significance. Cardio-encephalogram measurement has extremely important economic, social and scientific value: it can help rapid diagnosis of chest pain, early screening of coronary heart disease, measurement of abnormal...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/022
CPCG01R33/022
Inventor 周斌权尹凯峰柳治王婧闫业广尚慧宁
Owner BEIHANG UNIV
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