Using a plane wave approximation in simulation of radiation distribution in an X-ray Talbot interferometer |
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| Authors: | A S Gogolev M A Kazaryan A V Obkhodsky A S Popov R O Rezaev E A Smirnova |
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| Institution: | 1.National Research Tomsk Polytechnic University,Tomsk,Russia;2.Lebedev Physical Institute,Russian Academy of Sciences,Moscow,Russia;3.National Research Nuclear University “MEPhI”,Moscow,Russia |
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| Abstract: | This study is devoted to the analysis of the plane-wave approximation applicability to X-ray radiation incident on an object. Based on simple calculations, it is shown that an X-ray tube focal spot 0.4 × 0.8 mm in size at distances of ~1 m can be considered as a point source; however, the plane-wave approximation for such X-ray radiation with energy E = 22keV is valid for radiation source–object distances much longer than 10 m. |
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