Data for "Creation of Lunar-Like Rims in Ilmenite using Synthetic Solar Wind"

Data set for the manuscript "Creation of Lunar-Like Rims in Ilmenite using Synthetic Solar Wind" submitted for publication in The Planetary Science Journal. In this Article, we expose terrestrial ilmenite to deuterium ions to mimic the solar wind exposure on the lunar surface. We characterize the compositional and structural changes within the subsurface of deuterium-implanted ilmenite using Scanning Transmission Electron Microscopy (STEM) and Electron Energy Loss Spectroscopy (EELS). There are three zipped folders in this data repository: 1. "1-Nion UltraSTEM_EELS.zip": contains EELS data acquired on the Nion UltraSTEM (see methods in manuscript). All data are in dm4 format. Filenames are given by the energy ranges: low-loss (0-100 eV), Titanium L-edge (425-525 eV), Iron L-edge (677-777 eV), and Oxygen K-edge (500-600 eV). Each dm4 file contains two navigation axes and one signal axis. The navigation axes define a 2D map, and the signal axis contains an EELS spectrum with 2400 data points for each pixel within the 2D map. All analysis was done in Python using hyperspy. 2. "2-Hitachi HD-2700_HAADF.zip": contains High-Angle Annular Dark Field (HAADF) images obtained using the Hitachi HD-2700 (see methods in manuscript). Images are in dm3 format and used for image segmentation. 3. "3-Anylabeling_Image Segmentation.zip": contains results files with the segmentation results of the HAADF images. The segmentation results are used to determine the distribution of nanophase iron within the exposed ilmenite rims. Contains the following: Subfolders for each exposure time. Each subfolder contains three pre-processed masked images from Gwyddion (used as a guide for the Anylabelling segmentation, see methods in manuscript), output from Anylabelling segmentation in a JSON file, and processed npFe depth-distributions saved as a hyperspy signal. "example-2hr_distribution_processing.ipynb": code to create npFe depth-distributions based on image segmentation results. This code requires "2-Hitachi HD-2700_HAADF.zip" to be in the same parent directory. "summary-npFe_powerlaws.ipynb": code used to provide statistics of npFe distributions and create subplots shown in Figures 5 and 6 in the main text. "TRIM-*.npy": processed results from SRIM/TRIM simulations of 1keV D+ ions interacting with ilmenite (see methods in manuscript). These numpy files are used in the "summary-npFe_powerlaws.ipynb" notebook. Please contact the authors if you have any additional questions (Roshan Trivedi, [e-mail], or Philip First, [e-mail]).本数据集对应投稿至《行星科学期刊》（The Planetary Science Journal）的论文《利用合成太阳风在钛铁矿中制备类月边缘》（Creation of Lunar-Like Rims in Ilmenite using Synthetic Solar Wind）。本研究通过将天然钛铁矿暴露于氘离子辐照，以模拟月球表面的太阳风辐照环境，并采用扫描透射电子显微镜（Scanning Transmission Electron Microscopy, STEM）与电子能量损失谱（Electron Energy Loss Spectroscopy, EELS）表征氘注入钛铁矿亚表层的成分与结构变化。 本数据仓库中共包含3个压缩文件夹： 1. "1-Nion UltraSTEM_EELS.zip"：包含在Nion UltraSTEM电镜上采集的EELS数据（详见论文方法部分），所有数据均采用dm4格式存储。文件名由对应能区命名：低损能区（0~100 eV）、钛L边（425~525 eV）、铁L边（677~777 eV）以及氧K边（500~600 eV）。每个dm4文件包含2个导航轴与1个信号轴：导航轴用于定义二维扫描图谱，信号轴则存储二维图谱中每个像素对应的EELS谱，每条谱包含2400个数据点。所有数据分析均通过Python结合Hyperspy完成。 2. "2-Hitachi HD-2700_HAADF.zip"：包含使用Hitachi HD-2700透射电镜采集的高角环形暗场（High-Angle Annular Dark Field, HAADF）图像（详见论文方法部分），图像格式为dm3，用于图像分割任务。 3. "3-Anylabeling_Image Segmentation.zip"：包含HAADF图像的分割结果文件，用于确定辐照后钛铁矿边缘内纳米相铁（nanophase iron, npFe）的分布情况。该文件夹包含以下内容： - 按辐照时长划分的子文件夹，每个子文件夹内含3张来自Gwyddion的预处理掩膜图像（用于辅助Anylabelling分割，详见论文方法部分）、Anylabelling分割输出的JSON文件，以及以Hyperspy信号格式保存的加工后npFe深度分布数据。 - "example-2hr_distribution_processing.ipynb"：基于图像分割结果生成npFe深度分布的代码，运行该代码需将"2-Hitachi HD-2700_HAADF.zip"置于同一父目录下。 - "summary-npFe_powerlaws.ipynb"：用于统计npFe分布特征并生成正文中图5、图6所用子图的代码。 - "TRIM-*.npy"：1keV氘离子与钛铁矿相互作用的SRIM/TRIM模拟加工结果（详见论文方法部分），该numpy文件可用于"summary-npFe_powerlaws.ipynb"脚本。 如有任何额外问题，请联系作者：Roshan Trivedi（邮箱：[e-mail]）或Philip First（邮箱：[e-mail]）。