Dual energy X ray detector and dual energy X ray detector array device

A detector array and X-ray technology, which is applied in the field of radiation detection, can solve the problems affecting the detection efficiency of detectors, the accuracy of material identification of assembly accuracy, and the uniformity of thickness of scintillator, so as to achieve the effect of improving material identification ability

Active Publication Date: 2011-01-05
NUCTECH CO LTD
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Benefits of technology

This new type of radiation detection device has several technical features that make it easier for users to identify small differences between materials without having them undergo multiple tests at once. It also makes it lighter than previous designs while still being effective even when used on heavier items like vehicles.

Problems solved by technology

This patented technical problem addressed in the present patents relating to improving the performance (efficiency) and resolution of x- ray fluorescence analysis techniques involves reducing the size of the target's area being analyzed while maintaining accurate measurements over time without increasing complexity.

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Embodiment Construction

[0030] The interaction between X-rays and scintillators deposits energy through photoelectric effect, Compton effect and electron pair effect. After absorbing energy, scintillators generate excitation and emit visible light in the process of de-excitation, also known as scintillation light. Photodetection devices convert the collected scintillation light signals into electrical signals. The signal output of photodetection devices is related to both the energy deposition of X-rays and the light collection efficiency of scintillation light. The collection efficiency of scintillation light is related to the distance between the photodetector device and the place where the scintillation light is emitted. Generally, the closer the distance is, the higher the collection efficiency is. For X-rays with different energies, due to the different attenuation coefficients, the statistical distribution of energy deposition positions inside the scintillator is also different, which in turn l...

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Abstract

The invention provides a dual energy X ray detector which sequentially comprises a first photoelectric detector, a scintillator and a second photoelectric detector in the incidence direction of an X ray, wherein the first photoelectric detector and the second photoelectric detector are respectively arranged on the front end face and the back end face of the scintillator; the X ray penetrates through the first photoelectric detector and enters the scintillator; and the scintillator converts the incident X ray into visible light. The first photoelectric detector and the second photoelectric detector are used for receiving the visual light emitted by the scintillator and converting the visual light into electric signals. The relative difference between the low energy part and the high energy part of the energy spectrum of the X ray penetrating an object can be measured by using the dual energy X ray detector, and a basis for material recognition is provided.

Description

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Claims

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Application Information

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Owner NUCTECH CO LTD
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