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arXiv 1505.04445physics.optics
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近场散斑扫描X射线成像

Near-field speckle-scanning-based x-ray imaging

Sebastien Berujon, Eric Ziegler

摘要:

X射线近场散斑扫描概念是最近引入的用于获得样品的吸收、相位和暗场图像的方法。在本文中,我们提出的方法,恢复从一个样品的超小角度X射线散射分布的数值反卷积。我们还展示了如何从随机步进扫描中获取2D相位梯度信号,后者有可能避免平场校正误差。每个功能的理论解释和实验证明在同步加速器X射线设施。

英文摘要:

The x-ray near-field speckle-scanning concept is an approach recently introduced to obtain absorption, phase, and dark-field images of a sample. In this paper, we present ways of recovering from a sample its ultrasmall-angle x-ray scattering distribution using numerical deconvolution. We also show how to access the 2D phase gradient signal from random step scans, the latter having the potential to elude the flat-field correction error. Each feature is explained theoretically and demonstrated experimentally at a synchrotron x-ray facility.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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