The ALTAIR cryogenic gravitational-wave experiment

Physics

Scientific paper

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Cryogenic Equipment, Gravitational Wave Antennas, Gravitational Waves, Background Noise, Resonant Frequencies, Sensitivity, Vibration Mode

Scientific paper

Experimental results obtained with the cryogenic gravitational-wave resonant detector ALTAIR located in Frascati (Italy) are reported. The ALTAIR detector consists of a cylindrical bar equipped with a capacitive resonant transducer and a dc SQUID amplifier; the first longitudinal mode of resonance of the antenna is at 1.8 kHz. The best sensitivity reached, in terms of the effective noise temperature, is 20 mK, corresponding to a metric perturbation of 3 x 10 exp -18.

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