Event driven 4D STEM acquisition with a Timepix3 detector: microsecond dwelltime and faster scans for high precision and low dose applications

The data sets and the processing scripts are a part of the publication: <strong>Event driven 4D STEM acquisition with a Timepix3 detector: microsecond dwelltime and faster scans for high precision and low dose applications (</strong>arXiv:2107.02864<strong>). </strong>The programming language used to process the data is written with python 3. In this work, a Timepix3 detector is used to perform 4D STEM experiments where instead of a frame based detection, a event driven approach is used. The experiments where performed on a probe-corrected FEI Themis Z with an acceleration voltage of 60 and 200 kV. The files provided show how to get the figures from the publication starting from the raw .t3p data. All intermediate data is added to reduce the computing time and give the ability to retrieve the images without the need to perform all the calculations. The .yml file contains the necessary package needed to perform the data analysis. For the single-sideband ptychographic reconstruction, the gitlab repository https://gitlab.com/pyptychostem/pyptychostem is used.本数据集与配套处理脚本隶属于以下发表成果：《基于Timepix3探测器的事件驱动型4D扫描透射电子显微镜采集：面向高精度低剂量应用的微秒驻留时间与快速扫描方案》（arXiv:2107.02864）。本数据集的处理脚本采用Python 3编写。本研究采用Timepix3探测器开展4D扫描透射电子显微镜（4D STEM）实验，摒弃传统基于帧的探测模式，转而采用事件驱动的探测方案。实验在配备探针球差校正器的FEI Themis Z型透射电子显微镜上完成，加速电压设置为60 kV与200 kV。本数据集附带的文件演示了如何从原始.t3p数据出发，复现该论文中的全部图表。为缩短计算耗时并允许用户无需执行全部计算即可获取成像结果，所有中间数据均已一并提供。本数据集附带的.yml配置文件包含了开展数据分析所需的全部依赖包。针对单边带叠层成像重建任务，本研究使用了GitLab仓库https://gitlab.com/pyptychostem/pyptychostem中的pyptychostem工具包。