Neutron spectrum measurement method in multi-sphere neutron spectrometer based on pulse spectrum segmentation response

By segmenting the detection results of the slowing sphere of the multi-sphere neutron spectrometer into energy ranges and establishing more linearly independent equations, the problem of insufficient response function of the multi-sphere neutron spectrometer was solved, and the accuracy and reliability of neutron energy spectrum measurement were improved.

CN116755139BActive Publication Date: 2026-06-05CHINA INSTITUTE OF ATOMIC ENERGY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA INSTITUTE OF ATOMIC ENERGY
Filing Date
2023-05-15
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing multi-sphere neutron spectrometers suffer from insufficient response functions during neutron energy spectrum interpretation, resulting in inaccurate measurement results. Furthermore, increasing the number of slowing sphere detectors significantly increases costs.

Method used

By employing the pulse spectrum segmented response method, the detection results of each modulated sphere are divided into multiple energy ranges, establishing more linearly independent equations, enriching the response matrix, and improving measurement accuracy without increasing the number of modulated spheres.

Benefits of technology

Without increasing the number of moderation spheres, the reliability and accuracy of neutron energy spectrum measurements are significantly improved, and richer energy spectrum information is obtained.

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Abstract

This invention relates to a method for measuring the neutron energy spectrum of a multi-sphere neutron spectrometer based on pulse spectrum segmented response. It simulates the pulse spectrum response of a single-energy neutron incident multi-sphere spectrometer, segments it according to different energy ranges, and obtains a new response matrix. Then, it segments the measurement results Y of the multi-sphere spectrometer according to the same energy range to obtain n corresponding segmented measurement results Y1, Y2, ..., Y... n Let k1, k2, ..., k be the numbers respectively. n 1-dimensional vectors, combine them into a k1+k2+…+k n The new vector of the measurement results is used to solve for the neutron energy spectrum X according to the formula. Using the method disclosed in this invention, the response of a multi-sphere neutron spectrometer is simulated and statistically analyzed across energy ranges, and the measurement results of the multi-sphere neutron spectrometer are processed. Without increasing the number of spheres in the multi-sphere neutron spectrometer, more linearly independent equations are obtained, resulting in richer energy spectrum information. This improves the reliability and accuracy of solving the neutron energy spectrum without incurring additional costs.
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