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A shaft concentric multi-sphere neutron spectrometer, its measurement method, and analysis and processing system

A technology of a neutron spectrometer and a measurement method, which is applied in the field of neutron energy spectrum measurement, and can solve the problems of inability to detect neutrons above 20 MeV, complicated switching, complicated storage and handling, etc.

Active Publication Date: 2022-03-01
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a shaft concentric multi-sphere neutron spectrometer and its measurement method and analysis and processing system. The technical problem to be solved is that the traditional multi-sphere neutron spectrometer cannot detect neutrons above 20 MeV, and multiple independent Spherical shells are used together, switching is complicated and time-consuming, and the work in storage and handling is complicated

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  • A shaft concentric multi-sphere neutron spectrometer, its measurement method, and analysis and processing system
  • A shaft concentric multi-sphere neutron spectrometer, its measurement method, and analysis and processing system
  • A shaft concentric multi-sphere neutron spectrometer, its measurement method, and analysis and processing system

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Embodiment 1

[0057] In order to solve the technical problems that the traditional multi-sphere neutron spectrometer cannot detect neutrons above 20 MeV, and multiple independent spherical shells are used together, the switching is complicated, time-consuming, and the work is complicated in storage and transportation. The present invention provides a The shaft concentric multi-sphere neutron spectrometer at least includes a base, a main shaft installed on the base, a shaft assembly nested on the main shaft, a concentric multi-sphere housing sleeved on the shaft assembly, A drive assembly connected to the shaft assembly; a detector is installed on the main shaft; the concentric multi-spherical shell includes at least two layers of first spherical shells with different thicknesses and at least one layer of second spherical shells, and each layer of the The first spherical shell is composed of a hemispherical porous metal shell of the same quality and a hemispherical non-metallic shell, and the...

Embodiment 2

[0068] see Figure 7 , the present embodiment provides a measurement method of a shaft concentric multi-sphere neutron spectrometer, which can be applied to the shaft concentric multi-sphere neutron spectrometer described in Example 1, with a hemispherical non-metallic shell as a hemispherical The polyethylene shell is set to 5 layers as an example (n=5). This method specifically includes steps:

[0069] S1. By rotating the different first spherical shells by 180°, a total of 2 n The combined thickness of the hemispherical non-metallic shell is used to obtain the response function matrix under the combined thickness, and n is the number of layers of the hemispherical non-metallic shell.

[0070] In this step, the obtaining of the response function matrix under the combined thickness specifically includes:

[0071] According to the thermal neutron-1000MeV neutron energy obtained from the simulation, j different energy group energy discrete value pairs 2 n A response function...

Embodiment 3

[0098] Embodiment 3 of the present invention also provides an analysis and processing system 30 of a shaft concentric multi-sphere neutron spectrometer, which can be applied to the shaft concentric multi-sphere neutron spectrometer described in Embodiment 1, such as Figure 8 As shown, it includes a signal collection unit 301 , a data processing unit 302 and a display unit 303 connected in sequence.

[0099] The signal collection unit 301 is used to connect the detector 8 of the quill concentric multi-sphere neutron spectrometer, so as to obtain the pulse signal output by the detector 8 . The signal collection unit 301 can adopt a data transmission line to be connected between the signal output end of the detector 8 and the signal input end of the data processing unit 302; Interactively, the corresponding pulse signal can be obtained.

[0100] The data processing unit 302 is used to convert the collected pulse signal into a corresponding count value matrix, and then execute t...

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Abstract

The invention relates to the field of neutron energy spectrum measurement, and specifically discloses a shaft concentric multi-sphere neutron spectrometer, a measurement method, and an analysis and processing system. The neutron spectrometer is equipped with a sleeve shaft assembly, a concentric multi-spherical shell sleeved on the sleeve shaft assembly, and a drive assembly is set to individually and automatically drive the spherical shells on each sleeve shaft. The method of thick polyethylene spherical shell can quickly form moderator layers of polyethylene with different thicknesses to realize the measurement of different neutron energies, so as to improve the sensitivity to neutrons above 10MeV and realize the energy spectrum of neutrons in the range of 0-1000MeV Measurement, and use the same detector to measure, reducing the complexity of traditional multi-ball system installation. In the measurement method, the pulse signal provided by the detector is converted into a corresponding count value matrix, and combined with the calculation formula of the neutron energy spectrum and the response function matrix simulated in advance, the neutron energy spectrum corresponding to the count value matrix can be quickly obtained , to ensure the accuracy and stability of the measurement.

Description

technical field [0001] The invention relates to the field of neutron energy spectrum measurement, in particular to a shaft concentric multi-sphere neutron spectrometer, a measurement method, and an analysis and processing system. Background technique [0002] In recent years, accelerator technology has continued to develop, and its applications in life have become more extensive, especially in heavy ion therapy for cancer and clean energy. The surrounding dose equivalent of neutrons produced by the accelerator can verify whether the operation of the equipment meets the requirements, and the surrounding dose equivalent of neutrons in space can also be used for the effective dose equivalent received by the human body. In addition, the accurate measurement of neutron dose equivalent in workplaces such as military and civilian nuclear facilities and nuclear power plants can better protect the health of personnel. [0003] The multi-sphere neutron spectrometer system was first p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T3/00G01T1/36
CPCG01T3/00G01T1/365G01T1/36
Inventor 杨剑波王昌铭庹先国成毅王洪辉李锐彭颖
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING