Christian Grefe in front of a model of the CLIC accelerator

Links
- https://www.pi.uni-bonn.de/en/news/cern-fahrt/2025_cern_exkursion-41.jpg/image_view_fullscreen
- https://www.pi.uni-bonn.de/en/news/cern-fahrt/2025_cern_exkursion-41.jpg/@@download/image/2025_CERN_Exkursion(41).jpg