Example far-field PXCT for the Toupy Tutorials

An experimental dataset obtained at the cSAXS beamline (PSI, CH) by applying PXCT to the characterization of a shaped fluid catalytic cracking (FCC) catalyst. The open-access publication is: da Silva, J. C., Mader, K., Holler, M., Haberthür, D., Diaz, A., Guizar-Sicairos, M., Cheng, W-.C., Shu, Y., Raabe, J., Menzel, A., van Bokhoven, J. A., “Assessment of the 3D pore structure and individual components of preshaped catalyst bodies by X-ray imaging”, ChemCatChem 7, 413-416 (2015) The file containing the data should be PXCTprojections.npz, which includes the complex-values PXCT projections. For the sake of speed and to reduce the computing resources required for this tutorial, the projections have been downsized (binned) by a factor 2, which also means the pixel size is twice larger than the original pixel size. Nevertheless, this does not affect the data processing step, which should be identical to the original dataset.本实验数据集采集于瑞士保罗谢尔研究所（PSI, CH）的相干小角X射线散射（cSAXS）光束线，通过像素X射线计算机断层扫描（PXCT）技术对成型流化催化裂化（FCC）催化剂开展表征工作。相关开放获取文献如下： da Silva, J. C., Mader, K., Holler, M., Haberthür, D., Diaz, A., Guizar-Sicairos, M., Cheng, W-.C., Shu, Y., Raabe, J., Menzel, A., van Bokhoven, J. A., "Assessment of the 3D pore structure and individual components of preshaped catalyst bodies by X-ray imaging", ChemCatChem 7, 413-416 (2015) 存储该数据集的文件为PXCTprojections.npz，其中包含复数值形式的PXCT投影数据。 为提升本教程的运算速度并降低所需计算资源，已将投影数据按2倍因子进行降采样（分箱处理），这意味着像素尺寸较原始像素尺寸扩大了一倍。不过该处理并不会影响数据处理流程，其处理步骤与原始数据集完全一致。