Miniature gamma ray detector based on MPPC module

Abstract

The invention provides a miniature gamma ray detector based on an MPPC module. The miniature gamma ray detector comprises a scintillator crystal, an MPPC module, a first-layer sealing aluminum shell,a second-layer sealing aluminum shell, an end cover, a connector assembly, a signal line, a first-layer circuit board and a second-layer circuit board; the scintillation crystal is installed in an inner cavity of the first-layer sealed aluminum shell in a sealed mode, and the MPPC module is installed on one side of the scintillation crystal and used for receiving fluorescence photon signals of thescintillator crystal. The miniature gamma ray detector in the scheme adopts a structural form of the MPPC module, the scintillator crystal, the first-layer circuit board, the second-layer circuit board, the first sealing aluminum shell and the second sealing aluminum shell; on the basis that excellent detection performance is guaranteed, the size of appearance equipment of the whole detector is reduced, so that the detector is convenient to carry, and the detector can be applied to operation nuclear power stations, retired nuclear facility places and the field of nuclear terrorist prevention.

Description

technical field [0001] The invention relates to the technical field of gamma-ray detectors, in particular to a miniature gamma-ray detector based on an MPPC module. Background technique [0002] With the country's call for the use of clean energy, the development of nuclear energy has been rapidly promoted in recent years. At the same time, there is an increasing demand for rapid monitoring of nuclear energy safety operation. During the operation of the nuclear power plant and during the decommissioning process, the staff need to wear relevant dose rate instruments to measure the radiation intensity of the surrounding environment to ensure personal safety; and the detector part of most measurement rate instruments currently used is made of G-M tubes, and the measured information can only reflect the current intensity of ionizing radiation, but not the specific types of nuclides. In the measurement of the commonly used specific analysis of nuclide species, the front end of ...

AI Technical Summary

Problems solved by technology

During the operation of the nuclear power plant and during the decommissioning process, the staff need to wear relevant dose rate instruments to measure the radiation intensity of the surrounding environment to ensure personal safety; and the detector part of most measurement rate instruments currently used is made of G-M tube, and the measured information can only reflect the current intensity of ionizing radiation, but not the specific types of nuclides

In the measurement of the commonly used specific analysis of nuclide species, the front end of the detector uses a photomultiplier tube and a scintillator, which can have a higher energy resolution, but its overall volume is large, and it is not convenient to make a portable device

[0003] In addition, with the development of anti-terrorism, anti-nuclear smuggling, and nuclear terror prevention at home and abroad in recent years, the traditional long-term dependence on NAI (sodium iodide) scintillation crystal detectors for nuclide identification can no longer meet the application requirements. The radionuclide identification instrument was tested and found that it could no longer meet the performance index requirements for the detection of illegally transported nuclear materials, especially for the mixing or shielding of multiple radionuclides; therefore, in order to solve the above problems, it is necessary to design a The new gamma ray detector has solved the shortcomings of the existing detection equipment, such as large volume and single measurement results

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