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Atomic Physics Seminars

ics Atomic
Monday, October 7, 2002
4:00 PM
Physics Building, Room 204
Francois Bondu [Host: Olivier Pfister]
CNRS-Observatoire De La Cote Dazur
"Interferometric detection of gravitational waves: technical issues and Challenges"
The detection of gravitational waves, predicted by general relativity, requires to detect the relative motion between masses at rest. An interferometric setup such as the one selected by VIRGO (project between France and Italy) or LIGO (US observatory) should have the required sensitivity to see severe astrophysical events. This requires to be able to control seismic noise, the thermal noise of the masses, the frequency noise of the laser, the shot noise on the photodiode detector, and to have high specifications on the mirrors (roughness, losses). Advanced interferometers will call for even advanced technologies: squeezed light, cryogenic mirrors, all reflective optical setups, advanced seismic isolations...

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