New measurements obtained at the University of Rome by means of a cryogenic gravitational-wave antenna of mass M ~ 24.4 kg operated at T= 4.5 and 1.5 K are reported. The operation was interrupted after 90 hours of data taking, mainly during successive nights, although the antenna could continue to function very satisfactorily for a much longer time. The rate of disturbances is so small that it can be easily eliminated by coincidences with other antennas. The overall effective temperature obtained with an appropriate data analysis algorithm at T= 1.5 K is T.~_ ~0.79 K. This value is mostly due to the noise temperature of the FET preamplifier which constitutes the main limiting factor to the sensitivity of present gravitational-wave resonant antennas.
Measurements with a small (M=24.4 kg) cryogenic gravitational-wave antenna at T=1.5 K / Amaldi, Edoardo; Cosmelli, Carlo; Bonifazi, P.; Bordoni, F.; Ferrari, Valeria; Giovanardi, U.; Vannaroni, G.; Pallottino, Giovanni Vittorio; Pizzella, Guido; Modena, I.. - In: NUOVO CIMENTO DELLA SOCIETÀ ITALIANA DI FISICA. C. - ISSN 0390-5551. - STAMPA. - 1:4(1978), pp. 341-359. [10.1007/BF02525046]
Measurements with a small (M=24.4 kg) cryogenic gravitational-wave antenna at T=1.5 K
AMALDI, Edoardo;COSMELLI, Carlo;FERRARI, Valeria;PALLOTTINO, Giovanni Vittorio;PIZZELLA, Guido;
1978
Abstract
New measurements obtained at the University of Rome by means of a cryogenic gravitational-wave antenna of mass M ~ 24.4 kg operated at T= 4.5 and 1.5 K are reported. The operation was interrupted after 90 hours of data taking, mainly during successive nights, although the antenna could continue to function very satisfactorily for a much longer time. The rate of disturbances is so small that it can be easily eliminated by coincidences with other antennas. The overall effective temperature obtained with an appropriate data analysis algorithm at T= 1.5 K is T.~_ ~0.79 K. This value is mostly due to the noise temperature of the FET preamplifier which constitutes the main limiting factor to the sensitivity of present gravitational-wave resonant antennas.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
