The EXPLORER gravitational wave antenna: recent improvements and performances
Open Access
- 19 March 2002
- journal article
- Published by IOP Publishing in Classical and Quantum Gravity
- Vol. 19 (7) , 1905-1910
- https://doi.org/10.1088/0264-9381/19/7/391
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%.Keywords
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