First test of a BAE transducing scheme on a resonant gravitational-wave antenna

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作者：
Bonifazi, P [1 ]
Vaselli, S [1 ]
Visco, M [1 ]
机构：
[1] CNR, Ist Fis Spazio Interplanetario, I-00044 Frascati, Italy
来源：
NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA C-GEOPHYSICS AND SPACE PHYSICS | 1997年 / 20卷 / 05期
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摘要：
We present the results obtained with a resonant capacitive transducer, suitable for Back Action Evasion (BAE) measurements, coupled for the fir st time to a gravitational-wave antenna. This scheme was developed in collaboration with the Group of the University of Rome La Sapienza. The antenna is a 270 kg aluminum 5056 alloy cylinder, with a resonant frequency of 1805 Hz, operating at 4.2 K in the ALTAIR cryostat, located in Frascati (Italy) at the IFSI-CNR laboratory. The apparatus was able to work continuously for periods as long as days, both in up-conversion and BAE configurations, with good stability. The behaviour of the system is in reasonable agreement with a proposed model of a double harmonic oscillator in a BAE readout scheme. The limits on the sensitivity of this set-up are discussed as well as the possible future improvements.
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页码：643 / 649
页数：7
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