Stratum tomography system and method based on gamma rays

Abstract

The invention belongs to the technical field of stratigraphic structure tomography, and discloses a gamma-ray-based stratigraphic tomography imaging system and method. The scintillation crystal detector collects gamma rays in cosmic rays and undergoes de-excitation and SiPM photoelectric conversion into electrical pulse signals to the coincidence event circuit. The coincidence event circuit extracts imaging parameters such as time, position, and energy information from it, and reconstructs the image through the analytical iteration method. and imaging. The stratigraphic structure imaging system and method provided by the present invention can not only accurately measure the stratigraphic structure, but also have the characteristics of higher spatial resolution and uniform field of view compared with the existing technology.

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 ...

AI Technical Summary

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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