We describe the present status of a new read-out for the EXPLORER and NAUTILUS gravitational wave detectors. The read-out is based on a double-gap capacitive transducer and a double-SQUID amplifier. The transducer has been tested at liquid helium temperature and a Q of 1.0.106 has been measured with a biasing field of 20 MV/m. The double- SQUID amplifier has been tested down to 2 K with a high-Q resonant input load, showing very good stability and energy resolution, of about 70℠. With the new read-out, NAUTILUS, cooled to 100 mK, could reach a peak sensitivity of 3 . 10 -22Hz-1/2 and a bandwidth, at the level of 10 -21Hz-1/2, of about 35 Hz. © 2006 IOP Publishing Ltd.
Bassan, M., Carelli, P., Fafone, V., Minenkov, Y., Pallottino, G., Rocchi, A., et al. (2006). A new capacitive read-out for EXPLORER and NAUTILUS. In Journal of Physics: Conference Series (pp.89-93) [10.1088/1742-6596/32/1/014].
A new capacitive read-out for EXPLORER and NAUTILUS
BASSAN, MASSIMO;FAFONE, VIVIANA;
2006-01-01
Abstract
We describe the present status of a new read-out for the EXPLORER and NAUTILUS gravitational wave detectors. The read-out is based on a double-gap capacitive transducer and a double-SQUID amplifier. The transducer has been tested at liquid helium temperature and a Q of 1.0.106 has been measured with a biasing field of 20 MV/m. The double- SQUID amplifier has been tested down to 2 K with a high-Q resonant input load, showing very good stability and energy resolution, of about 70â„ . With the new read-out, NAUTILUS, cooled to 100 mK, could reach a peak sensitivity of 3 . 10 -22Hz-1/2 and a bandwidth, at the level of 10 -21Hz-1/2, of about 35 Hz. © 2006 IOP Publishing Ltd.Questo articolo è pubblicato sotto una Licenza Licenza Creative Commons
