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29 September 2004 Dual detectors of gravitational waves
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In a "Dual" gravitational wave (GW) detector a wide band sensitivity is obtained by measuring the differential displacement, driven by the GW, of the facing surfaces of two nested massive bodies mechanically resonating at different frequencies. A "selective readout" scheme, capable of specifically selecting the signal contributed by the vibrational modes sensitive to the gravitational waves, could then reduce the thermal noise contribution from the not sensitive modes. In a dual detector the sensitivity improvement in the displacement transduction could be pursued by means of mechanical amplification systems. This solution is innovative for the resonant GW detectors and we report about preliminary theoretical and experimental study.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michele Bignotto, Michele Bonaldi, Massimo Cerdonio, Livia Conti, Giovanni Andrea Prodi, Luca Taffarello, and Jean-Pierre Zendri "Dual detectors of gravitational waves", Proc. SPIE 5500, Gravitational Wave and Particle Astrophysics Detectors, (29 September 2004);


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