Fusion neutron real-time energy spectrum unfolding method for magnetic confinement device

Abstract

The invention discloses a fusion neutron real-time spectrum unfolding method for a magnetic confinement device. The fusion neutron real-time spectrum unfolding method for a fusion neutron multi-ball spectrometer of the magnetic confinement device is realized by utilizing a method of combining an artificial neural network and Monte Carlo. The fusion reaction in the current magnetic confinement plasma has the characteristics of short duration and narrow energy interval (0.5-20 MeV), so that compared with a conventional energy spectrum unfolding method of a neutron multi-sphere spectrometer, the real-time energy spectrum unfolding method of the fusion neutron multi-sphere spectrometer has the advantages that more attention is paid to the real-time performance and a specific neutron energy interval: the real-time performance of energy spectrum measurement is ensured by using an artificial neural network; and a lot of fusion neutron training spectra corresponding to plasma parameters are constructed by using Monte Carlo and other calculation methods, so that the energy spectrum unfolding precision of the artificial neural network in a fusion neutron energy range is ensured. The method is mainly applied to fusion neutron energy spectrum real-time measurement of the magnetic confinement plasma.

Description

technical field [0001] The invention belongs to an energy spectrum analysis method, in particular to a real-time energy spectrum analysis method for fusion neutrons of a magnetic confinement device. Background technique [0002] Fusion neutron spectrum diagnosis is an important part of fusion plasma diagnosis. Fusion neutron spectroscopy is mainly measured using a neutron time-of-flight spectrometer. Because neutron time-of-flight spectrometers have high energy resolution in measuring neutron energy spectra, large and medium-sized fusion plasma devices in the world are equipped with neutron time-of-flight spectrometers. However, the neutron time-of-flight spectrometer has a low count rate and cannot obtain a fusion neutron spectrum with high time resolution (less than 100 ms) during the plasma discharge process. Compared with the neutron time-of-flight spectrometer, the fusion neutron multisphere spectrometer has a higher neutron count rate due to its ultra-high detection ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a real-time fusion neutron energy spectrum analysis method of a magnetic confinement device, which can solve the problem of poor accuracy of using a neutron multi-sphere spectrometer in the fusion neutron field to measure the fusion neutron energy spectrum, and Problems of low time resolution of fusion neutron spectrum measured by neutron time-of-flight spectrometer

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