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Neutron diffraction enhanced imaging device

A technology that enhances imaging and neutrons, applied in material analysis using radiation diffraction, etc., can solve the problems that affect the contrast and resolution of neutron phase contrast imaging, and achieve high signal-to-noise ratio, high resolution, and high contrast Effect

Inactive Publication Date: 2005-03-16
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

[0021] The biggest disadvantage of this device is: due to the interference of various scattered waves and transmitted waves, the contrast and resolution of neutron phase contrast imaging are seriously affected

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Embodiment Construction

[0039] see figure 2 , figure 2 is a schematic diagram of the neutron diffraction enhanced imaging device of the present invention, such as figure 2 As shown, the neutron diffraction enhanced imaging device of the present invention is composed of 9 parts: a monochromator 2 is provided in the advancing direction of the collimated neutron beam 1, and the monochromator 2 forms a grazing incidence angle θ with the neutron beam 1 , place the analyzer 4 parallel to the monochromator 2, the direction of the neutron beam diffracted by the analyzer 4 is the detector 5, which is placed at 45° on the optical axis of the visible light converted by the detector 5 An aluminum reflector 6, a CCD camera 7 is arranged on the reflected light path of the aluminum reflector 6, the output terminal of the CCD camera 7 is connected to a display 8, and the detector 5, the aluminum reflector 6 and the CCD camera 7 are sealed Ground is contained in a camera obscura 9.

[0040] Said collimated neut...

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Abstract

It is a neutron diffraction buildup image apparatus, which comprises calibrated neutron beam and detector and is characterized by the following: to locate monochromator along the forward direction of the calibrated neutron beam at an incidence angle Theta with the monochromator; to parallel lay an analyzer to the monochromator; the analyzer diffraction neutron beam is at a direction of the said detector ; to lay a aluminum lens at an angle of 45 degrees to the light axis translated by the detector; to locate a CCD cameral on the reflection path of the aluminum lens and the output end of the CCD cameral is connected with a display; the said detector, aluminum reflection lens and CCD cameral are tightly located in a dark case. The advantages of this invention are the following: it eliminates dispersion noise generated when neutron and nucleus act together and directly penetrate the neutron interference and improves the contrast and distinguishability of the neutron.

Description

technical field [0001] The invention relates to neutron imaging, in particular to a neutron diffraction enhanced imaging device, which has extremely wide applications in defense industry, biomedicine and the like. Background technique [0002] Neutrons belong to baryons, one of the four types of elementary particles. They have certain basic characteristics such as a certain rest mass, no charge, a spin of 1 / 2, a negative magnetic moment, and free neutrons are unstable and undergo beta decay. [0003] Neutrons interact with matter. Unlike charged particles and electromagnetic waves (X and γ-rays), neutrons have no charge. When they are injected into matter, they have almost no interaction with extranuclear electrons and do not need to overcome the Coulomb force barrier of charges, so the energy is very small Low neutrons can also enter the nucleus (target nucleus) to cause various nuclear reactions, and the probability of the reaction is often very high. [0004] The interac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/20
Inventor 陈建文高鸿奕李儒新徐至展
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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