XLab Frascati is a facility open to external users for different X-ray analyses, ranging from structural studies through X-ray diffraction to elemental mapping by means of µX-ray Fluorescence, colour tomography and X-ray imaging studies. This is possible thanks to our experimental layouts XENA (X-ray Experimental station for Non-destructive Analysis) and RXR (Rainbow X-Ray) along with our facility for the production of polycapillary optics. The know-how on these optics enable us improving the performances of our setups by adopting the best fitting X-ray optics according to the experimental requirements. To make an example, the main advantage of RXR is that the detection system includes two spectrometers working in high (arranged in the polycapillary confocal geometry) and low X-ray energies,, respectively, permitting both the 2D µXRF scan and 3D µXRF elemental mapping (colour tomography) due to the confocal geometry with a 3-axis fine motion system. The article showcases the results obtained in key case studies where we performed: (i) 2D/3D µXRF to analyse chemical composition of tree rings with respect the influence of the environmental context, to study a “fresco” fragment and assess the presence of damages, to make a 3D reconstruction of a screw encapsulated in glue through the its elemental composition as well as (ii) X-ray imaging and (iii) µCT/dynamic CT to characterize LiF detectors, to study the structure of a flower bud and to evaluate the profile distribution of a diesel spray from the nozzle.

中文翻译：

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XLab Frascati X射线应用程序和最新进展

XLab Frascati是向外部用户开放的设施，可进行不同的X射线分析，从结构研究到X射线衍射，再到通过µX射线荧光，彩色层析成像和X射线成像研究进行元素映射。这得益于我们的实验布局XENA（用于无损分析的X射线实验站）和RXR（彩虹X射线），以及用于生产多毛细管光学器件的设施。这些光学技术的专有技术使我们能够根据实验要求采用最适合的X射线光学器件，从而改善设置的性能。举例来说，RXR的主要优点是该检测系统包括两个分别在高（以多毛细管共焦几何形状排列）和低X射线能量下工作的光谱仪，由于具有3轴精细运动系统的共焦几何形状，因此可以进行2D µXRF扫描和3D µXRF元素映射（彩色层析成像）。本文展示了我们在以下关键案例研究中获得的结果：（i）2D / 3D µXRF分析环境环境影响下的年轮化学成分，研究“壁画”碎片并评估损害的存在，通过其元素组成以及（ii）X射线成像和（iii）µCT /动态CT对LiF检测器进行表征，对封装在胶中的螺钉进行3D重建，以研究花蕾的结构并评估喷嘴中柴油喷雾的轮廓分布。