Next few decades will be extremely exciting in Astronomy. New telescopes will enter in operation on Earth and in space; at the same time a new generation of Gravitational Wave detectors will be so powerful that they will detect the merging of black-holes binaries in the whole visible universe, up to a redshift of one hundred. Studying high energy events with a true Multi-Messenger Astronomy will give us a fantastic opportunity to discover new objects and new physics.
After a short introduction on the science case for a new generation of GW detectors, the presentation will be focused on the many challenges that scientists need to face to reduce the internal noise of the interferometers by a factor 10 with respect the current generation of instruments. Both the collaborations of Virgo and LIGO have prepared conceptual design and design studies that are attracting new scientists every day.
In Europe a collaboration has started to be formed around the project called Einstein Telescope. Details will be given on this observatory made of several interferometers working at cryogenic as well as at room temperatures. The CNRS is already involved in the whole field of GW but many scientists in France can find opportunities in this new field, applying their expertise on the detector development as well as on data analysis or astrophysics.