Abstract The investigation of archaeological samples, such as ancient ceramics, provides more details about the past. In this work, we suggest a new approach for the calibration of a depth profiling of ceramic fragments with glazed layers. X-ray Micro Computed Tomography (μCT) serves as a calibration method for a depth-profile analysis using Laser-Induced Breakdown Spectroscopy (LIBS). In this case, μCT benefits from different contrasts of the glaze layer (containing lead) and the ceramic matrix (lead-free). Non-destructive μCT scans provide a dimensional analysis and a 3D observation of LIBS craters with a resolution at the micrometer level. The LIBS analysis combined with μCT enables a precise depth-wise calibration to the number of laser pulses. Moreover, a visualization of the ablation process allows observing the laser beam as it passes through the glaze, the interface and the ceramic matrix. The ablation rate determined using μCT scans enabled the differentiation of individual phases of the ablation process penetrating the surface layer. As each of these steps is characterized by a different ablation rate, a more precise calibration for the depth calculation is possible. Such an approach is unique and may be further used in a depth profile calibration regardless of the analyzed sample.

中文翻译：

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用于考古陶瓷检查的激光诱导击穿光谱深度剖面的 X 射线显微计算机断层扫描辅助校准

摘要 对古代陶瓷等考古样本的调查，提供了更多关于过去的细节。在这项工作中，我们提出了一种校准带有釉层的陶瓷碎片深度剖面的新方法。X 射线显微计算机断层扫描 (μCT) 用作使用激光诱导击穿光谱 (LIBS) 进行深度剖面分析的校准方法。在这种情况下，μCT 受益于釉层（含铅）和陶瓷基质（无铅）的不同对比度。非破坏性 μCT 扫描提供了 LIBS 陨石坑的尺寸分析和 3D 观察，分辨率达到微米级。LIBS 分析与 μCT 相结合，可以对激光脉冲数量进行精确的深度校准。而且，烧蚀过程的可视化允许观察激光束穿过釉料、界面和陶瓷基体。使用 μCT 扫描确定的消融率能够区分穿透表面层的消融过程的各个阶段。由于这些步骤中的每一步都具有不同的消融率，因此可以对深度计算进行更精确的校准。这种方法是独一无二的，并且可以进一步用于深度剖面校准，而不管分析的样本如何。深度计算的更精确校准是可能的。这种方法是独特的，并且可以进一步用于深度剖面校准，而不管分析的样本如何。深度计算的更精确校准是可能的。这种方法是独特的，并且可以进一步用于深度剖面校准，而不管分析的样本如何。