论文标题
纠正探测通过进动路径分段徘徊的
Correcting for probe wandering by precession path segmentation
论文作者
论文摘要
在过去的几十年中，预动力电子衍射已成为解决结构解决，应变分析和方向映射的强大技术，仅举几例。进攻电子束的好处之一是增加了相互的空间分辨率，尽管由于所谓的“探针徘徊”，但由于损失了空间分辨率。在这里，提出了一种新的进动路径分割的方法，以抵消这种效果，并增加了从扫描预动力电子衍射数据中重建的虚拟图像中的分辨率。通过利用快速的像素化电子检测器技术，对光束的每个方位角旋转记录了多个帧，从而可以在收购后处理中纠正探针徘徊。重建的图像的分辨率不仅显着增加，而且由于仪器未对准而引起的探测徘徊，可能会放松已经很难的对准程序。
Precession electron diffraction has in the past few decades become a powerful technique for structure solving, strain analysis, and orientation mapping, to name a few. One of the benefits of precessing the electron beam, is increased reciprocal space resolution, albeit at a loss of spatial resolution due to an effect referred to as 'probe wandering'. Here, a new methodology of precession path segmentation is presented to counteract this effect and increase the resolution in reconstructed virtual images from scanning precession electron diffraction data. By utilizing fast pixelated electron detector technology, multiple frames are recorded for each azimuthal rotation of the beam, allowing for the probe wandering to be corrected in post-acquisition processing. Not only is there an apparent increase in the resolution of the reconstructed images, but probe wandering due to instrument misalignment is reduced, potentially easing an already difficult alignment procedure.
