ABSTRACT
The term instrument scientist means the scientist who ensures a well-functioning instrument, the best data measurements possible and a secure processing of the primary experimental data. The handover of the processed data to the research group who devised the experimental proposal in the first place can be made and whose scientists can derive further results, and which we call the derived data. Of course, the respective roles of the members of a research project team do not exactly follow these simplified definitions, but they are a reasonable, albeit approximate, description of the scientific roles played. The best of instruments and the best of instrument scientists attract beamtime proposals from the best research groups and even serve as a magnet pulling research groups away from their home countries.
