期刊
OPTICS EXPRESS
卷 22, 期 19, 页码 23480-23488出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.22.023480
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资金
- U.K. EPSRC [EP/J018171/1]
- EC's 7th Framework Programme (LASERLAB-EUROPE) [284464]
- EC's 7th Framework Programme (EUCARD-2 project) [312453]
- EC's 7th Framework Programme (Extreme Light Infrastructure (ELI) project)
- EPSRC [EP/I021884/1, EP/I022562/1]
- EPSRC [EP/J018171/1, EP/I022562/1, EP/I021884/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J018171/1, EP/I021884/1, EP/I022562/1] Funding Source: researchfish
Interest in phase contrast imaging methods based on electromagnetic wave coherence has increased significantly recently, particularly at X-ray energies. This is giving rise to a demand for effective simulation methods. Coherent imaging approaches are usually based on wave optics, which require significant computational resources, particularly for producing 2D images. Monte Carlo (MC) methods, used to track individual particles/photons for particle physics, are not considered appropriate for describing coherence effects. Previous preliminary work has evaluated the possibility of incorporating coherence in Monte Carlo codes. However, in this paper, we present the implementation of refraction in a model that is based on time of flight calculations and the Huygens-Fresnel principle, which allow reproducing the formation of phase contrast images in partially and fully coherent experimental conditions. The model is implemented in the FLUKA Monte Carlo code and X-ray phase contrast imaging simulations are compared with experiments and wave optics calculations. (C) 2014 Optical Society of America
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