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Equipment of cobalt 60 gamma ray source-cesium iodide or cadmium tungstate detector for checking container

一种γ射线源、检测设备的技术，应用在核技术应用领域，能够解决集装箱检测设备海关查私工作发展缓慢、限制辐射成像无损检测技术推广应用、电子加速器结构复杂等问题，达到减少停机检修的时间和维护经费、重量轻、图像清晰质量好的效果

Inactive Publication Date: 2002-01-30
BEIJING ISOTOPE NUCLEAR ELECTRONICS MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Using an electron accelerator as a ray source has the following defects: the structure of the electron accelerator is complex, huge and heavy, it is difficult to manufacture, the cycle is long, and the cost is high
[0009] To sum up, the use of electron accelerators and gas detectors in container detection systems or equipment is not only complicated in manufacturing process, heavy in equipment, expensive in price, but also high in operation and maintenance costs, making many users daunted
This greatly limits the promotion and application of radiation imaging non-destructive testing technology, so that the use of container testing equipment for customs inspections develops very slowly

Method used

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  • Equipment of cobalt 60 gamma ray source-cesium iodide or cadmium tungstate detector for checking container
  • Equipment of cobalt 60 gamma ray source-cesium iodide or cadmium tungstate detector for checking container
  • Equipment of cobalt 60 gamma ray source-cesium iodide or cadmium tungstate detector for checking container

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Embodiment Construction

[0049] Cobalt 60 gamma ray source provided by the present invention-cesium iodide or cadmium tungstate detector container detection equipment

[0050] The high specific activity cobalt 60γ-ray source 1 with an activity of 11.1TBq (300Ci>) is used, and the active area line is 6 mm. The shielding container 2 is made of tungsten alloy and lead. The ray shutter 2'and the front collimator 3 are made of Made of iron, their slits collimate the gamma rays emitted by the source into a sheet fan-shaped beam with a horizontal opening angle of 0.1° and a vertical opening angle of 65°. Detector 6 is a cesium iodide detector with pixel size 2 , Cesium iodide scintillator, silicon photodiode and corresponding electronic circuit form the array detector 6, and the detection efficiency of the cobalt 60 gamma ray source is more than 50%. The source shielding container 2, the ray shutter 2'and the front collimator 3 are fixed on the same base to form a complete assembly (hereinafter referred to as th...

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Abstract

The container detection equipment is composed of Co 60 gamma ray source and its shielding container, front collimator and back collimator, cesium iodide or cadmium tungstate array detector, signal and image processing system, container driving system and autoamtic control system, in which the shielding container of Co 60 gamma ray source and its ray shutter and frout collimator are fixed on same machine seat, and formed into one whole body, and placed in source chamber, and the back collimator, cesium iodide or cadminium tungstate array detector and ray catcher are fixed on same machine seat,formed into one whole body and placed in detector chamber, and between the source chamber and detector chamber there is a container detection channel. Said equipment possesses excellent detection performance, and is stable, reliable, good in safety, easy to manufacture and possesses extensive application.

Description

Technical field [0001] The invention relates to the application field of nuclear technology, in particular to a container detection equipment for a cobalt 60 gamma ray source-cesium iodide or cadmium tungstate detector. Background technique [0002] The current container inspection system or equipment can be roughly divided into electron accelerators (including electron linear or electrostatic accelerators) and scintillation detectors or gas detectors combined from the perspective of the combination of ray sources and detectors used; cobalt 60 gamma ray source or cesium 137 gamma The radiation source (cesium 137 gamma ray source) is combined with a gas detector. The electron accelerator is used as the radiation source, and the scintillation detector is used as the radiation detector, and the two are combined to make a detection system or equipment. For example, the electron linear accelerator and cadmium tungstate (CdWO) used by British Aerospace Co. and Russian Electrophysics 4 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/04G01T1/202G01V5/00
CPCG01V5/0016G01V5/22
Inventor 赵景岐陈惠民韩其方黄志诚王翌善陈力李永清孟波孙汉成罗金汉李虹金川董国平黄校垣董明文刘俊庆杨永红李东姚晓冬周全
Owner BEIJING ISOTOPE NUCLEAR ELECTRONICS MACHINE
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