Single-beam atomic gravity gradient sensor based on complementary reflector

A gravitational gradient and mirror technology, used in instruments, scientific instruments, measuring gravitational fields, etc., can solve the problems of complex laser systems and low reliability, and achieve the effects of small size, improved reliability and stability, and fewer components

Active Publication Date: 2021-10-01
TIANSHUI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Examples

Experimental program
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Embodiment Construction

[0045] Below in conjunction with accompanying drawing and embodiment describe in detail:

[0046] 1. Overall

[0047] Such as figure 1 , the sensor 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;

[0048]Each cold atom interference device includes a vacuum container 1, a vacuum pump 3, an alkali metal sample 4, a vacuum separator 5, a complementary mirror 6, a three-dimensional magneto-optical trap reverse magnetic field coil pair 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 three-dimensional magneto-optical trap reverse magnetic field coil pair 8, a bias magnetic field coil 9, a vacuum pump 3 and a photodetector 10 are arranged in sequence;...

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Abstract

The invention discloses a single-beam atomic gravity gradient sensor based on a complementary reflector, and relates to the field of gravity gradient measurement by an atomic interference technology. The single-beam atomic gravity gradient sensor comprises a first cold atom interference device (A) and a second cold atom interference device (B) which are connected end to end and have the same structure, wherein each cold atom interference device comprises a vacuum container (1), a first laser beam emitter (2), a vacuum pump (3), an alkali metal sample (4), a vacuum separator (5), a complementary reflector (6), a second laser beam emitter (7), a three-dimensional magneto-optical trap reverse magnetic field coil pair (8), a bias magnetic field coil (9) and a photoelectric detector (10). According to the invention, a physical system and an optical system of the sensor become simple from complexity, the reliability is improved, the sensor has good long-term stability, miniaturization and application of an atomic gravity gradiometer are promoted, and the sensor plays an important role in resource exploration, environment monitoring, basic physical research and the like.

Description

technical field [0001] The invention relates to the field of gravity gradient measurement 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 describing the spatial change rate of gravity, which is caused by uneven or sudden changes in the distribution of geological structure and material density on the earth's surface. Anomalies in gravity gradients are often associated with oil and gas, mineral deposits, or changes in the movement of substances inside the surface. Scientists can invert the distribution characteristics of local geological structures and material densities 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 gradien...

Claims

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Application Information

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Patent Type & Authority Applications(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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