High-speed neutron photographing device

Abstract

The invention relates to a neutron imaging technology, in particular to a high-speed neutron photographing device which structurally comprises a neutron conversion cavity and a detection cavity, wherein the neutron conversion cavity is provided with a scintillation screen for converting a neutron image into a visible image, and a plane mirror for refracting visible light to the detection cavity is arranged at the rear side of the scintillation screen; the detection cavity is internally provided with a lens and a high-speed CMOS (Complementary Metal-Oxide-Semiconductor Transistor) camera; the lens and the high-speed CMOS camera are wholly arranged in a shielding lead box, the lens faces to a visible light incident direction, and a translation platform capable of driving the lens and the high-speed CMOS camera to move wholly is arranged in the detection cavity. The high-speed neutron photographing device provided by the invention can respond to different view field ranges and resolution requirements and can be used for performing automatic focusing on different object distances so as to guarantee automatic regulation and measurement of online belts.

Description

technical field [0001] The invention relates to neutron imaging technology, in particular to a high-speed neutron imaging device. Background technique [0002] Neutron imaging works on the same principle as X-ray fluoroscopy, except that neutrons are used to penetrate objects. Compared with X-ray imaging, neutron imaging has stronger penetrating power and can see lighter elements, such as C, H, O, N, etc. The disadvantage is that the neutron imaging intensity is weak, so the resolution and noise are worse than X-rays. [0003] At present, there are mainly three types of neutron sources used in neutron imaging, which are isotopic neutron sources (neutron flux at the measured object ~10 3 n / cm 2 / s), accelerator neutron source (neutron flux at the measured object ~ 10 3 n / cm 2 / s to 10 6 n / cm 2 / s), and the reactor neutron source (neutron flux at the measured object ~ 10 5 n / cm 2 / s to 10 9 n / cm 2 / s). The strongest neutron source is the reactor, so only the neutro...

AI Technical Summary

Problems solved by technology

[0004] The two existing neutron high-speed camera devices in the world both use a structure with a fixed distance between the CMOS camera and the scintillation screen. The advantages are simple structure, easy shielding, and convenient operation. The disadvantage is that it is difficult to meet different field of view and resolution requirements.

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