Experimental approaches for the Einstein Telescope

Interferometric gravitational wave detectors currently under operation have reached their design sensitivities and will by upgraded to their second generation having ten times more sensitivity. It is expected that these instruments will detect gravitational waves directly for the first time and thus opening the era of gravitational wave astronomy. The Einstein Telescope design study - funded by the European Commission - investigates the technical and scientific challenges for a third generation of gravitational wave detectors that will have a 100 times better sensitivity compared to the first generation. This contribution summarises selected experimental approaches for the Einstein Telescope and will discuss challenges for the future research within this vital field of precision measurements.