3-Mode detection for widening the bandwidth of resonant gravitational wave detectors

被引：59

作者：

Baggio, L

Bignotto, M

Bonaldi, M

Cerdonio, M

Conti, L

Falferi, P ^{[1
]}

Liguori, N

Marin, A

Mezzena, R

Ortolan, A

Poggi, S

Prodi, GA

Salemi, F

Soranzo, G

Taffarello, L

Vedovato, G

Vinante, A

Vitale, S

Zendri, JP

机构：

[1] CNR, ITC, Ist Foton & Nanotecnol, I-38050 Trento, Italy

[2] Ist Nazl Fis Nucl, Grp Collegato Trento, Sez Padova, I-38050 Trento, Italy

[3] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy

[4] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

[5] Ist Nazl Fis Nucl, Grp Collegato Trento, Sez Padova, I-38050 Trento, Italy

[6] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Padua, Italy

[7] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy

[8] Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy

[9] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

[10] Univ Trent, Dipartimento Fis, I-38050 Trento, Italy

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.94.241101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have implemented a novel scheme of signal readout for resonant gravitational wave detectors. For the first time, a capacitive resonant transducer has been matched to the signal amplifier by means of a tuned high Q electrical resonator. The resulting 3-mode detection scheme widens significantly the bandwidth of the detector. We present here the results achieved by this signal readout equipped with a two-stage SQUID amplifier. Once installed on the AURIGA detector, the one-sided spectral sensitivity obtained with the detector operated at 4.5 K is better than 10(-20) Hz(-1/2) over 110 Hz, and in good agreement with the expectations.

引用

页数：4

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