Tunnelling,
Structural engineering,
Concrete construction
European XFEL Röntgenlaserprojekt
Planning and construction of a tunnel system with a total length of 5.8 kilometres and seven underground structures Since 2014, the Hamburg research facility has been used to generate extremely intense X-ray flashes for use by researchers all over the world. The flashes are produced in a 3.4-kilometre-long [...] film chemical reactions and study processes that occur inside planets. The research facility runs from the German Electron Synchrotron (DESY) site in Hamburg to the town of Schenefeld. It begins on the DESY site, where the central supply stations can be found. The main tunnel takes up the first 2.1 kilometres[...]