Single-beam atomic gravity gradient sensor based on complementary mirrors

A gravity gradient and reflector technology, which is applied in the direction of instruments, scientific instruments, and gravitational field measurement, can solve problems such as low reliability and complex laser systems, and achieve improved reliability and stability, small size, and improved efficiency. Effect

Active Publication Date: 2022-08-09
TIANSHUI NORMAL UNIV
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  • Abstract
  • Description
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Problems solved by technology

However, two atomic interferometers require 12 beams of cooling lasers, 1 beam of Raman lasers, 2 beams of probe lasers and 2 pump lasers, plus the corresponding frequency and power control systems, making the laser system still complicated and not reliable

Method used

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  • Single-beam atomic gravity gradient sensor based on complementary mirrors
  • Single-beam atomic gravity gradient sensor based on complementary mirrors
  • Single-beam atomic gravity gradient sensor based on complementary mirrors

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0045] Describe in detail below in conjunction with accompanying drawing and embodiment:

[0046] 1. Overall

[0047] like figure 1 , the sensor includes two first cold atom interference device A and second cold atom interference device B, which are connected end to end and have the same structure;

[0048]Each cold atom interference device includes a vacuum vessel 1 , a vacuum pump 3 , an alkali metal sample 4 , a vacuum separator 5 , a complementary mirror 6 , a pair of three-dimensional magneto-optical trap reverse magnetic field coils 8 , a bias magnetic field coil 9 , and a photodetector 10 , the first laser beam transmitter 2, the second laser beam transmitter 7;

[0049] Its location and connectivity are:

[0050] On the outer wall of the vacuum container 1, from top to bottom, an alkali metal sample 4, a pair of three-dimensional magneto-optical trap reverse magnetic field coils 8, a bias magnetic field coil 9, a vacuum pump 3 and a photodetector 10 are sequentially...

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Abstract

The invention discloses a single-beam atomic gravity gradient sensor based on a complementary reflecting mirror, and relates to the field of measuring gravity gradient by atomic interference technology. The present invention includes two first cold atom interference devices (A) and second cold atom interference devices (B) that are connected end to end and have the same structure; each cold atom interference device includes a vacuum container (1), a first laser beam emitter (2), vacuum pump (3), alkali metal sample (4), vacuum separator (5), complementary mirror (6), second laser beam emitter (7), three-dimensional magneto-optical trap reverse magnetic field coil pair ( 8), a bias magnetic field coil (9) and a photodetector (10). The invention makes the physical system and optical system of the sensor change from complex to simple, improves the reliability and has good long-term stability, promotes the miniaturization and application of the atomic gravity gradiometer, and enables the sensor to be used in resource exploration, environmental monitoring and basic physics. important role in research.

Description

technical field [0001] The invention relates to the field of measuring gravity gradient by atomic interference technology, in particular to a single beam atomic gravity gradient sensor based on complementary mirrors. Background technique [0002] Gravity gradient is a physical quantity that describes the rate of change of gravity in space, which is caused by uneven or sudden change of geological structure and material density distribution on the earth's surface. Abnormal gravity gradients are often associated with oil and gas, mineral deposits, or changes in the movement of materials inside the surface. Scientists can infer the local geological structure and distribution characteristics of material density through the measurement data of gravity gradients. Therefore, the measurement of high-precision gravity gradient plays an important role in geological exploration, earth science, space science and inertial navigation. [0003] At present, mature gravity gradient measureme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V7/00G01V7/02
CPCG01V7/00G01V7/02
Inventor 王玉平令维军刘晓斌李向兵
Owner TIANSHUI NORMAL UNIV
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