Stratum tomography system and method based on gamma rays

A tomography and gamma ray technology, applied in the field of stratigraphic structure exploration, can solve the problems of difficulty in detecting the energy spectrum and chemical composition of cosmic rays, high triggering threshold energy, short operation period, etc. Accurate results and low operating voltage

Active Publication Date: 2021-01-19
NANCHANG UNIV
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Problems solved by technology

The earliest use of the array is to use the method of sampling detection. The trigger threshold of this method is very high, and there is a large amount of cosmic ray background, so it is difficult to detect the gamma ray signal and measure the energy spectrum and chemical composition of cosmic rays. Wide field of view, and will not be affected by the weather, but the sensitivity is relatively low
The IACT array of the Imaging Atmospheric Cherenkov Telescope has excellent angular resolution and background discrimination capabilities, but its field of view is small, and it needs to avoid urban light sources for moonless night observations, resulting in a very short operating period

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  • Stratum tomography system and method based on gamma rays
  • Stratum tomography system and method based on gamma rays
  • Stratum tomography system and method based on gamma rays

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Embodiment 1

[0036]A γ-ray-based formation tomography system

[0037]Attachedfigure 1 , Attachedfigure 1 It is a three-level module diagram of the imaging system of the present invention. The present invention provides a gamma-ray-based formation tomography imaging system, which structurally includes a gamma-ray data detector module 100, a coincidence event acquisition and processing module 200, and a formation image reconstruction and imaging module 300.

[0038]The γ-ray data detector module 100 is used to control the angle of the crystal array to receive a larger area of ​​γ-rays, receive the γ-rays and convert them photoelectrically into scintillation pulse signals (electrical signals) and output them to the coincidence event acquisition and processing module 200 for processing; its structure , The γ-ray data detector module 100 includes a crystal detector module 110 and a detector angle control module 120; wherein the detector control module 120 outputs angle control information to the crystal de...

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Abstract

The invention belongs to the technical field of stratum structure tomography, and discloses a stratum tomography system and method based on gamma rays. Gamma rays in cosmic rays are collected througha scintillation crystal detector and subjected to deexcitation and SiPM photoelectric conversion to form electric pulse signals to be sent to a coincidence event circuit, imaging parameters such as time, position and energy information are extracted from the coincidence event circuit, and image reconstruction and imaging are carried out through an analytical iteration method. The stratum structureimaging system and method provided by the invention not only can accurately determine the stratum structure, but also have the characteristics of higher spatial resolution and uniform full view compared with the prior art.

Description

Technical field[0001]The invention belongs to the technical field of stratum structure exploration, and specifically relates to a γ-ray-based stratum tomography imaging system and method.Background technique[0002]Tomography technology is based on medical CT, according to the ray scan, the obtained information is inverted and calculated, and the image of the elastic wave and electromagnetic wave parameter distribution law of the rock mass within the measured range is reconstructed, so as to achieve a kind of geophysical prospecting to delineate the geological anomaly. Inversion interpretation method. According to the different geophysical fields used, tomography is divided into elastic wave tomography and electromagnetic wave tomography. Elastic wave and electromagnetic wave travel time tomography mainly refers to velocity tomography, which uses the travel time of rays in the rock and soil medium, and electromagnetic wave absorption coefficient tomography uses the field energy after ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V5/00G01T1/15G01T1/29G01T1/24
CPCG01T1/15G01T1/248G01T1/2907G01T1/2985G01V5/0075
Inventor 邓贞宙陈冠东宋贤林牛明牛广达李永绣
Owner NANCHANG UNIV
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