当前位置: X-MOL 学术J. Appl. Crystallogr. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Method for restoration of X-ray absorption fine structure in sparse spectroscopic ptychography
Journal of Applied Crystallography ( IF 6.1 ) Pub Date : 2022-08-02 , DOI: 10.1107/s1600576722006380
Nozomu Ishiguro, Yukio Takahashi

The spectroscopic ptychography method, a technique combining X-ray ptychography imaging and X-ray absorption spectroscopy, is one of the most promising and powerful tools for studying the chemical states and morphological structures of bulk materials at high resolutions. However, this technique still requires long measurement periods because of insufficient coherent X-ray intensity. Although the improvements in hardware represent a critical solution, breakthroughs in software for experiments and analyses are also required. This paper proposes a novel method for restoring the spectrum structures from spectroscopic ptychography measurements with reduced energy points, by utilizing the Kramers–Kronig relationship. First, a numerical simulation is performed of the spectrum restoration for the extended X-ray absorption fine structure (EXAFS) oscillation from the thinned theoretical absorption and phase spectra. Then, this algorithm is extended by binning the noise removal to handle actual experimental spectral data. Spectrum restoration for the experimental EXAFS data obtained from spectroscopic ptychography measurements is also successfully demonstrated. The proposed restoration will help shorten the time required for spectroscopic ptychography single measurements and increase the throughput of the entire experiment under limited time resources.

中文翻译:

稀疏光谱成像中X射线吸收精细结构的恢复方法

光谱成像方法是一种结合 X 射线成像成像和 X 射线吸收光谱的技术,是高分辨率研究散装材料的化学状态和形态结构的最有前途和最强大的工具之一。然而,由于相干 X 射线强度不足,该技术仍需要较长的测量周期。虽然硬件的改进是一个关键的解决方案,但也需要在用于实验和分析的软件方面取得突破。本文提出了一种利用 Kramers-Kronig 关系从减少能量点的光谱 ptychography 测量中恢复光谱结构的新方法。第一的,从变薄的理论吸收和相位光谱对扩展 X 射线吸收精细结构 (EXAFS) 振荡的光谱恢复进行了数值模拟。然后,通过合并噪声去除来扩展该算法以处理实际的实验光谱数据。还成功地证明了从光谱 ptychography 测量获得的实验 EXAFS 数据的光谱恢复。拟议的恢复将有助于缩短光谱 ptychography 单次测量所需的时间,并在有限的时间资源下增加整个实验的吞吐量。还成功地证明了从光谱 ptychography 测量获得的实验 EXAFS 数据的光谱恢复。拟议的恢复将有助于缩短光谱 ptychography 单次测量所需的时间,并在有限的时间资源下增加整个实验的吞吐量。还成功地证明了从光谱 ptychography 测量获得的实验 EXAFS 数据的光谱恢复。拟议的恢复将有助于缩短光谱 ptychography 单次测量所需的时间,并在有限的时间资源下增加整个实验的吞吐量。
更新日期:2022-08-02
down
wechat
bug