Since the beginning of 2000 the EXPLORER gravity wave (GW) detector has been operated continuously after a stop devoted to improve the apparatus. The antenna has been equipped with a new read-out. The use of a new transducer, characterized by a very small gap, and a dc-SQUID with a high coupling, led to a better sensitivity and a larger bandwidth. The EXPLORER sensitivity in terms of spectral noise amplitude, at present (June 2001), is 10−20 Hz−1/2 over a bandwidth of 35 Hz and 3 × 10−21 Hz−1/2 with a bandwidth of about 6 Hz, corresponding to a sensitivity to short conventional GW bursts of h = 4 × 10−19. The performance is stable and the apparatus is taking data with a duty cycle in excess of 80%.
Astone, P., Bassan, M., Bonifazi, P., Carelli, P., Castellano, M., Cavallari, G., et al. (2002). The EXPLORER gravitational wave antenna: recent improvements and performances. CLASSICAL AND QUANTUM GRAVITY, 19(7), 1905-1910 [10.1088/0264-9381/19/7/391].
The EXPLORER gravitational wave antenna: recent improvements and performances
BASSAN, MASSIMO;COCCIA, EUGENIO;FAFONE, VIVIANA;MODENA, IVO;MOLETI, ARTURO;PIZZELLA, GUIDO;ROCCHI, ALESSIO;
2002-01-01
Abstract
Since the beginning of 2000 the EXPLORER gravity wave (GW) detector has been operated continuously after a stop devoted to improve the apparatus. The antenna has been equipped with a new read-out. The use of a new transducer, characterized by a very small gap, and a dc-SQUID with a high coupling, led to a better sensitivity and a larger bandwidth. The EXPLORER sensitivity in terms of spectral noise amplitude, at present (June 2001), is 10−20 Hz−1/2 over a bandwidth of 35 Hz and 3 × 10−21 Hz−1/2 with a bandwidth of about 6 Hz, corresponding to a sensitivity to short conventional GW bursts of h = 4 × 10−19. The performance is stable and the apparatus is taking data with a duty cycle in excess of 80%.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
