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相衬成像技术是中子照相领域的一个新的发展方向。作者们实验的目的是研究掌握中子相衬成像的基础理论,探索利用SPRR-300多色热中子源进行中子相衬成像实验的可行性。根据同轴轮廓法相衬成像基本原理并针对SPRR-300中子照相装置的性能特点,提出了利用该装置进行中子相衬成像的实验方案,并进行了多次相衬成像探索实验,得到的实验结果和同轴轮廓法相衬成像理论在一定程度上吻合,虽然成像质量不高,但却部分显示出相衬成像的相关特性。故可以推定,与以前的传统成像实验相比,成像实验所获取的图像中相衬成像给予对比度的贡献获得了提高,但受实验条件和时间的限制,其相衬成像引起的边缘增强的特性显示得还不充分。
Phase contrast imaging technology is a new development in the field of neutron imaging. The purpose of the experiment is to study the basic theory of neutron phase contrast imaging and to explore the feasibility of neutron phase contrast imaging experiment using SPRR-300 multi-color thermal neutron source. According to the basic principle of phase contrast imaging of coaxial contour method and the performance characteristics of SPRR-300 neutron imaging apparatus, an experiment scheme of neutron phase contrast imaging using this apparatus is presented. Several phase contrast imaging exploration experiments are carried out. The experimental results coincide to some extent with the coaxial contour phase contrast imaging theory. Although the imaging quality is not high, some of the related characteristics of phase contrast imaging are shown. Therefore, it can be presumed that compared with the previous traditional imaging experiments, the contrast contribution of phase contrast imaging in the images acquired by the imaging experiment has been improved. However, due to the limitation of experimental conditions and time, the edge enhancement caused by phase contrast imaging Show not enough.