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.