Metallic nickel pillar X-ray spectral ptychographic dataset

This dataset was acquired at the SWING beamline at the French synchrotron SOLEIL. The dataset was obtained by conducting spectral 2D X-ray ptychography on a 7-micron diameter metallic nickel pillar. An energy scan was performed from 8.3 KeV to 8.4 KeV with a 1 eV step, including the resonant energy of nickel at 8.333 KeV. For each energy acquisition, the ptychographic scanning parameters consisted of 242 diffraction patterns from a field of view of 14x12 µm², with an exposure time of 100 ms per point. The ptychographic reconstruction was carried out using the PtychoShelves Matlab software package, involving 200 iterations of the difference map (DM) algorithm, followed by 100 iterations of the maximum likelihood (ML) algorithm.本数据集采集自法国同步辐射光源SOLEIL的SWING光束线站。本数据集通过对直径7微米的金属镍柱开展光谱型二维X射线叠层成像（spectral 2D X-ray ptychography）获取。实验中设置了能量范围为8.3 keV至8.4 keV、步长为1 eV的能量扫描，覆盖镍的共振能量8.333 keV。针对每一轮能量采集，叠层成像扫描参数为：在14×12 μm²的视场范围内采集242幅衍射图样，每个扫描点的曝光时长为100毫秒。叠层成像重建流程采用PtychoShelves Matlab软件包完成，先通过差分映射（DM）算法迭代200次，随后使用最大似然（ML）算法迭代100次。