High-speed neutron photographing device

A camera device and neutron technology, applied in high-speed photography, focusing devices, photography, etc., can solve problems such as difficult to meet the field of view range and resolution requirements, and achieve automatic adjustment measurement, simplified shielding structure, and ideal shielding effect Effect

Active Publication Date: 2013-10-30
CHINA INSTITUTE OF ATOMIC ENERGY
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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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  • High-speed neutron photographing device
  • High-speed neutron photographing device
  • High-speed neutron photographing device

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] Such as figure 1 As shown, the high-speed neutron imaging device includes two parts: a neutron conversion cavity 1 and a detection cavity 2 . The neutron conversion cavity 1 converts neutron images into visible light images, and the detection cavity 2 is used to collect light signals. The frame material of the two cavities is made of aluminum alloy profiles with a cross-section of 2cm*2cm, and the outer skin is clad with 2mm thick aluminum foil. The cavities are connected by 4 screws. In this embodiment, the frame volume of the neutron conversion cavity is 40cm*40cm*40cm, and the frame volume of the detection cavity is 60cm*80cm*120cm.

[0017] The neutron conversion chamber 1 is provided with a scintillation screen 3 for converting neutron images into visible light images, and a plane mirror 4 is provided behind the scintillation screen 3 f...

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Abstract

The invention relates to neutron imaging technology, in particular to a high-speed neutron imaging device. Its structure includes a neutron conversion cavity and a detection cavity. The neutron conversion cavity is equipped with a scintillation screen for converting neutron images into visible light images. The back of the scintillation screen is equipped with a plane mirror for refracting visible light to the detection cavity; There is a lens and a high-speed CMOS camera, wherein the lens and the high-speed CMOS camera are placed in a shielded lead box as a whole, the lens faces the incident direction of visible light, and a translation stage capable of driving the lens and the high-speed CMOS camera to move as a whole is arranged in the detection cavity. The invention can respond to different field of view ranges and resolution requirements, and can automatically focus on different object distances to ensure automatic adjustment and measurement of the online belt.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B39/00G03B13/18
Inventor 贺林峰韩松柏王洪立郝丽杰武梅梅王雨魏国海陈东风刘蕴韬吴立齐
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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