Gravitational Waves: a new window to observe the Universe

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About VIRGO.. • French-Italian interferometric detector • a Fabry-Perot resonant cavity extends the optical length from 3 to about 100 kilometers because of multiple reflections • If optics and mirrors would be perfectly stable, no light should reach the detector except when a GW crosses the interferometer • Sensitivity from 10 to 10 4 Hz. • Expected detection of GWs by coalescent binary systems (stars, BHs, NSs) and SNs from the Virgo cluster
About VIRGO.. • Each optical element is suspended to a seismic isolation system contained in a vacuum “tower” • The towers are linked by vacuum tubes located inside tunnels • The seismic isolation is achieved through a chain of suspended seismic filters made of triangular cantilever blade springs providing the vertical isolation while the pendulum provides horizontal isolations. • In order to minimize the thermal noise the interferometer is cooled close to T=20° Kelvin (-253 °C) .
Page 1 and 2: Gravitational Waves: a new window t
Page 3 and 4: The gravitational waves are describ
Page 5 and 6: The gravitational waves are describ
Page 7 and 8: Weisberg & Taylor, 2004 The first i
Page 9 and 10: The Classical Detection Method: Web
Page 11 and 12: Elements of a Resonant Bar Aluminiu
Page 13 and 14: with bars… 1x10 -19 supernova in
Page 15 and 16: GRAVITATIONAL ASTRONOMY OBSERVATORI
Page 17 and 18: The laser interferometer detectors
Page 19 and 20: The Interferometer Network LIGO GEO
Page 22 and 23: LIGO Livingston Observatory
Page 26 and 27: About VIRGO • construction comple
Page 28 and 29: Orbit
Page 30 and 31: Instruments on board Each of the sp
Page 32 and 33: Instruments on board The cubes are
Page 34 and 35: • Current bar detectors will see

Gravitational Waves: a new window to observe the Universe

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