Neutron beam monitoring system based on silicon carbide detector

Abstract

The invention belongs to a neutron beam monitoring system, and aims to solve the problem that radiation damage is caused to a detector due to radiation of many neutrons and alpha particles in the reaction process of D (d, n) 3He or T (d, n) 4He when a particle accompanying method is adopted to measure the D-D / D-T neutron yield at present. The neutron beam monitoring system based on the silicon carbide detector comprises a vacuum accompanying target tube, the silicon carbide detector and an analysis processing system, the interior of one end of the vacuum accompanying target tube is used for arranging a target, and the other end of the vacuum accompanying target tube is sleeved with an insulating ring and a beam limiting diaphragm; the beam limiting diaphragm is close to the end of the vacuum accompanying target tube, the silicon carbide detector and the end face of the end, sleeved with the insulating ring, of the vacuum accompanying target tube are oppositely arranged, aluminum foil is arranged between the silicon carbide detector and the vacuum accompanying target tube, and 3-6 light reflecting and scattering diaphragms are arranged in the vacuum accompanying target tube in the axial direction of the vacuum accompanying target tube.

Description

technical field [0001] The invention belongs to a neutron beam current monitoring system, in particular to a neutron beam current monitoring system based on a silicon carbide detector. Background technique [0002] The D-D / D-T fusion reaction neutron generator is an important fast neutron source with high neutron yield and good neutron energy monochromaticity, and is widely used in basic nuclear data measurement in the fields of fission nuclear energy utilization and fusion nuclear energy utilization. and related applied research. [0003] Accurate monitoring of D-D / D-T neutron yield is an important guarantee for research work using D-D / D-T neutron generators. At present, there are many methods for measuring D-D / D-T neutron yield, mainly recoil proton telescope method, fission ion chamber method, BF 3 Proportional counting tube method and accompanying particle method, etc., among them, the accompanying particle method is by measuring T(d,n) 4 Accompanying alpha particles ...

AI Technical Summary

Problems solved by technology

[0005] The present invention is to solve the current measurement of the D-D / D-T neutron yield by the accompanying particle method, D(d,n) 3 He or T(d,n) 4 The He reaction process will be accompanied by the radiation of many neutrons and alpha particles, which will cause radiation damage to the detector and cause performance degradation, which is very unfavorable for obtaining reliable beam monitoring data. A neutron detector based on silicon carbide is provided. Beam Monitoring System

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