Physics
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988nimpa.263..221p&link_type=abstract
Nuclear Instruments and Methods in Physics Research Section A, Volume 263, Issue 1, p. 221-228.
Physics
Scientific paper
The scientific objectives of the gravitational wave (g.w.) experiment of the Rome group are briefly reviewed: (a) detection of g.w. bursts emitted during supernovae explosions in the Virgo cluster, and (b) detection of monochromatic g.w. possibly emitted by fast pulsars.
The interaction of a g.w. burst with a resonant antenna is considered. It is shown that in order to observe the supernovae in the Virgo cluster the resonant antenna should detect a Fourier transform value H(νR) of the metric tensor perturbation H(t) of the order of: H(νR) ~ 3 × 10-24/Hz at the antenna resonance frequency νR ~ 900 Hz.
The Rome group has installed a cryogenic antenna at CERN that has started to operate from November 1985. It consists of an aluminum cylinder, 3 m long, weighing 2270 kg, cooled to 4.2 K and equipped with a resonant capacitive transducer and a dc SQUID amplifier.
The present sensitivity expressed in terms of the minimum detectable value of H(νR) is Hmin(νR) ~ 9 × 10-22Hz-1.
In order to reach the final goal it is necessary to cool the antenna than 0.1 K and to shield it from cosmic ray muons.
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