The Ernst Ruska-Centre (ER-C) for Microscopy and Spectroscopy with Electrons is a national user facility open to universities, research institutions and research laboratories in industry. Operational services of the ER-C are based on the guiding principle, that external users are accompanied by experienced scientists and technical support staff. The Ernst Ruska-Centre is run conjointly by two institutions, the Institute of Microstructure Research at
Jülich Research Centre and the Central Facility for Electron Microscopy at
RWTH Aachen University. The facility is located on the campus of the Jülich Research Centre, part of the
Helmholtz Association of German Research Centres.