论文标题
中子暗场成像带有边缘照明
Neutron Dark-Field Imaging with Edge Illumination
论文作者
论文摘要
我们报告了边缘照明设置，可实现中子暗场成像，其中两个振幅调节器用于构造并随后分析中子束。调制器和分析仪是通过激光消融易于使用的薄金属箔制成的。通过在数值上反转具有可见性超过80 \％的强度调制函数的卷积模型来提取以传输和暗场对比度的样本表示。提出了两个测试样品，以表明暗场对比度如何补充更传统的中子X线摄影，特别是研究材料的微结构。由于设置的简单性，可忽略不计的连贯性要求以及该方法的鲁棒性，该方法可能会在多对比度中子射线照相和断层扫描中找到应用。
We report on an Edge Illumination setup enabling neutron dark-field imaging where two amplitude modulators are used to structure and subsequently analyze the neutron beam. The modulator and analyzer are manufactured by laser ablation of readily available thin metal foils. The sample representation in terms of transmission and dark-field contrast is extracted by numerically inverting a convolution model for the intensity modulation function which had a visibility exceeding 80\%. Two test samples are presented to show how dark-field contrast can complement the more conventional neutron radiography, in particular to investigate the micro-structure of materials. Thanks to the simplicity of the setup, the negligible coherence requirements and the robustness of the method, this approach may find application in multi-contrast neutron radiography and tomography.
