Ensuring FAIR data practices by Leveraging NeXus standards at BESSY II

Abstract In alignment with the FAIR[1] (Findable, Accessible, Interoperable, and Reusable) data principles, BESSY II is embarking on a transformative journey to enhance scientific research capabilities through the integration of standardized device interfaces for metadata capture and the adoption of NeXus[2] as the common data format. NeXus is a common data format specifically designed for neutron, X-ray, and muon science, making it ideally suited for the diverse experimental techniques employed at BESSY II. A cornerstone of this initiative is the ROCK-IT (Remote, Operando Controlled, Knowledge-driven, and IT-based) project, funded by the Helmholtz Association. This project not only exemplifies the practical application of FAIR principles at BESSY II but also serves as a demonstrator of how advanced IT can significantly enhance control and insights with a focus on the experiments. We present one of the efforts at BESSY II in curating FAIR data. For this, we are leveraging NeXus data format standards at mySpot beamline of BESSY II within the context of the ROCK-IT project. NeXus standards play a dual role of not only defining all data relevant to the beamline and the experiment but also defining the standards in the form of application definitions which helps in exchanging data between applications. We will discuss the progress of our efforts concerning the mySpot beamline, which is a multi-mode beamline designed to perform different techniques - XRD, SAXS, XRF, EXAFS, and XANES - simultaneously at the sample position.