CERN Accelerating science

Published Articles
Title Cryogenic system of the Rome group gravitational wave experiment
Related titleCryogenic system of the Rome group gravitational wave experiment
Author(s) Bronzini, F (INFN, Rome) ; Coccia, E (INFN, Rome ; Rome U.) ; Modena, I (INFN, Rome ; Rome U.) ; Rapagnani, P (INFN, Rome ; Rome U., Tor Vergata) ; Ricci, F (INFN, Rome ; Rome U., Tor Vergata)
Imprint 4 p.
In: Cryogenics 25 (1985) 234-237
In: 10th International Cryogenic Engineering Conference, Helsinki, Finland, 31 Jul - 3 Aug 1984, pp.234-237
DOI 10.1016/0011-2275(85)90201-2
Subject category Detectors and Experimental Techniques
Accelerator/Facility, Experiment CERN PS ; nTOF
Abstract The main characteristics of a large cryostat constructed by the gravitational wave group of the University of Rome, to cool down to liquid helium temperature Weber-type gravitational wave antennas, 3 m long and weighing up to 5000 kg, are presented. The cryogenic system has the following features: continuous operation time with an interval of 1 day every 54 days to refill the cryostat; small temperature gradients in the experimental chamber where the antenna is located, and very high acoustic and seismic insulation giving attenuation of 250 dB at the antenna detection frequency of 900 Hz. The system, installed at CERN, is now operating. Using a FET amplifier, the antenna is able to detect gravitational wave bursts with a metric tensor perturbation at the earth of the order of $3 \times 10^{−18}$. Another order of magnitude will be gained by using a d.c. SQUID amplifier.

Corresponding record in: Inspire


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