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KMID : 0357520150380010039
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Journal of Radiological Science and Technology
2015 Volume.38 No. 1 p.39 ~ p.49
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Study on Talbot Pattern for Grating Interferometer
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Kim Young-Ju
Oh Oh-Sung
Kim Jong-yul
Lee Seung-Wook
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Abstract
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One of properties which X-ray and Neutron can be applied nondestructive test is penetration into the object with interaction leads to decrease in intensity. X-ray interaction with the matter caused by electrons, Neutron caused by atoms. They share applications in nondestructive test area because of their similarities of interaction mechanism. Grating interferometer is the one of applications produces phase contrast image and dark field image. It is defined by Talbot interferometer and Talbot-Lau interferometer according to Talbot effect and Talbot-Lau effect respectively. Talbot interferometer works with coherence beam like X-ray, and Talbot-Lau has an effect with incoherence beam like Neutron. It is important to expect the interference in grating interferometer compared normal nondestructive system. In this paper, simulation works are conducted according to Talbot and Talbot-Lau interferometer in case of X-ray and Neutron. Variation of interference intensity with X-ray and Neutron based on wave theory is constructed and calculate elements consist the system. Additionally, Talbot and Talbot-Lau interferometer is simulated in different kinds of conditions.
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KEYWORD
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Nondestructive test, Grating interferometer, Talbot effect, Talbot-Lau effect, Simulation
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