A quantitative analysis method and system for self-powered detector space charge effect

By using the charge conservation law and the method of images, the charge and electric field distribution of the insulating layer of a self-powered neutron detector are calculated, solving the problems of low computational efficiency and accuracy in existing technologies, and realizing efficient and high-precision electrostatic field analysis.

CN117148417BActive Publication Date: 2026-06-12XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Filing Date
2023-07-04
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

In existing technologies, the calculation efficiency and accuracy of the electrostatic field of the insulating layer of self-powered neutron detectors are not high, and the assumed charge distribution pattern differs greatly from the actual situation. The Monte Carlo method has low calculation efficiency and large fitting error.

⚗Method used

By employing a method based on the law of conservation of charge, and combining Monte Carlo simulation and the method of images with Gauss's theorem, the rate of change of current and charge density at different radii of the insulating layer is calculated, and the electric field distribution is solved iteratively, thus avoiding the need to track the trajectory of electrons and fit the charge distribution function.

🎯Benefits of technology

It improves the accuracy and efficiency of calculating the electrostatic field of the insulating layer of a self-powered neutron detector, simplifies the calculation process, and allows the electric field distribution to be obtained directly from the charge distribution.

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Abstract

The application discloses a kind of quantitative analysis method and system of self-powered detector space charge effect, comprising the following steps: obtaining parameter, the size of total current at different radius of detector is obtained;Based on the size of total current at different radius of detector, the free charge density variation rate in the different radius interval of insulator is calculated according to the law of charge conservation;According to the free charge density variation rate of current moment, the average free charge density variation rate in next time step is solved iteratively, whether the total free charge density variation of adjacent two steps iteration meets the total charge density variation amount iterative convergence limit in single time step is judged;Whether the total free charge density variation meets the total free charge density variation stable convergence limit is judged, whether electric field reaches stable is confirmed.The application simplifies the calculation process, realizes the efficient, high-precision calculation of self-powered neutron detector insulating layer electrostatic field.
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