Local x-ray surface grain mapping of niobium

Our previous proposal on this subject was granted beamtime (HC-4065) and was performed as a remote experiment. Many different aspects concerning this experiment, like the sample and marker preparation, the remote organization and local nanoXRD measurements worked. Unfortunately, due to a leak in the oven and therefore severe unwanted oxidation, a vital part of the experiment could not be performed: we have no information about any structural surface changes after an anneal in pure nitrogen. Since this is crucial to the project, we ask for another 15 shifts of beamtime to complete our study. We refer to experimental report HC-4065 for details concerning the previous beamtime.

我们此前针对该课题的实验提案获批了束流时间（beamtime），编号为HC-4065，实验以远程方式开展。本次实验的多项环节均顺利推进，涵盖样品与标记物制备、远程实验统筹以及现场纳米X射线衍射（nanoXRD）测量。但遗憾的是，因烘箱发生泄漏引发严重非预期氧化，实验的核心环节未能完成：我们未获取纯氮气退火后样品表面结构变化的相关数据。鉴于该环节对本项目至关重要，我们申请额外15个束流时段以完成本次研究。有关此前束流实验的详细信息，请参阅实验报告HC-4065。