Improvements in planar feature reconstructions in atom probe tomography
Improvements in planar feature reconstructions in atom probe tomography
复制标题
原子探针断层扫描平面特征重建的改进
作者：
D. Larson;D. Larson;B. Geiser;T. Prosa;S. Gerstl;D. Reinhard;T. Kelly
标准原子探针层析成像空间重建技术在再现单晶数据集方面已经相当成功。然而，文物坚持重建，可以归因于一个球形蒸发表面的不正确的假设。使用模拟和实验场蒸发，我们研究了蒸发表面的预期形状，并提出使用可变点投影位置来在一定程度上减轻这些重建伪影。我们展示了可变投影位置的实施的初步结果，说明了对模拟和实验数据的影响，同时仍然保持球形投影表面。在蒸发过程中的低和高蒸发场材料的区域之间的界面的模型结构的试样形状。讨论了在更复杂的数据集重建中使用二维和三维投影点图。
Standard atom probe tomography spatial reconstruction techniques have been reasonably successful in reproducing single crystal datasets. However, artefacts persist in the reconstructions that can be attributed to the incorrect assumption of a spherical evaporation surface. Using simulated and experimental field evaporation, we examine the expected shape of the evaporating surface and propose the use of a variable point projection position to mitigate to some degree these reconstruction artefacts. We show initial results from an implementation of a variable projection position, illustrating the effect on simulated and experimental data, while still maintaining a spherical projection surface. Specimen shapes during evaporation of model structures with interfaces between regions of low‐ and high‐evaporation‐field material are presented. Use of two‐and three‐dimensional projection‐point maps in the reconstruction of more complicated datasets is discussed.