Quick analysis method of neutron pulse sequence three-order cumulant model

A technology of pulse sequence and order cumulant, which is applied in the direction of monitoring the pulse chain mode, etc., can solve the problems of long calculation cycle and large calculation amount, and achieve the effect of reducing consumption, improving calculation efficiency, and improving calculation efficiency

Inactive Publication Date: 2012-11-07
CHONGQING UNIV
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Problems solved by technology

[0007] Aiming at the above-mentioned deficiencies in the prior art, the present invention solves the problems of large amount of calculation and long calculation period when ana

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  • Quick analysis method of neutron pulse sequence three-order cumulant model
  • Quick analysis method of neutron pulse sequence three-order cumulant model
  • Quick analysis method of neutron pulse sequence three-order cumulant model

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Embodiment

[0033] Example: see figure 1 and figure 2 , with an enrichment degree of 85.15% 235 U The nuclear component is used as an example to illustrate the source-driven noise analysis system of the detector. All neutron pulse signals are collected through 3 channels. The first channel is the source channel, which is used to directly collect the source 252 The neutron pulse signal of the Cf neutron source; the second channel and the third channel are used to collect the neutron pulse signal generated by the detector body excited by the neutron source. The specific implementation steps are as follows:

[0034] (1) Collect neutron pulse data to obtain the time distribution of the neutron source and the neutron detection counts excited by the neutron source and generated by two detectors at different positions. The time distribution is in the form of "0 " and "1" composed of a neutron pulse sequence, the neutron pulse sequence is stored according to the position where the pulse oc...

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Abstract

The invention provides a quick analysis method of a neutron pulse sequence three-order cumulant model. The method includes the following steps: 1) collecting neutron pulse data to obtain a neutron source and time distribution of neutron detection counting stimulated by the neutron source and generated by two detection bodies at different positions; 2) blocking a neutron pulse data package collected in the step 1) according to certain length, conducting reduction to obtain neutron pulse sequences in each data block in each channel under the condition that the data blocks are continuously arranged without gaps; 3) conducting three-order cumulant calculation on data of each obtained data block to obtain the neutron pulse sequence three-order cumulant model. Counting of three-order cumulant in each data block in the step 3) adopts quick search algorithm. The model quick analysis method effectively reduces calculation time consumption, improves calculation efficiency and has important meaning on real time analysis of the three-order cumulant of materials to be measured.

Description

technical field [0001] The invention relates to an analysis method for a neutron pulse sequence, in particular to a model rapid analysis method for the third-order cumulant of the neutron pulse sequence. [0002] Background technique [0003] With the rapid development of nuclear science and technology, the measurement and analysis of the information carried by the nuclear information system composed of nuclear radiation and atomic nuclei is an important guarantee for the study of the internal characteristics and laws of the nuclear information system. In the prior art, the signal processing method used is mainly based on second-order statistics (correlation function in the time domain and power spectrum in the frequency domain). In the analysis, there are disadvantages such as inability to identify the minimum phase system, sensitivity to additive noise, and only processing the observation data of additive white noise. To overcome these disadvantages, analysis must be per...

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Application Information

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IPC IPC(8): H03K5/19
Inventor 魏彪刘易鑫杨帆冯鹏
Owner CHONGQING UNIV
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