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

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arxiv gr-qc/0502101 v1 pith:LXHHGIYF submitted 2005-02-24 gr-qc

L. Baggio , M. Bignotto , M. Bonaldi , M. Cerdonio , L. Conti , P. Falferi , N. Liguori , A. Marin
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R. Mezzena A. Ortolan S. Poggi G. A. Prodi F. Salemi G. Soranzo L. Taffarello G. Vedovato A. Vinante S. Vitale J. P. Zendri
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keywords detectorresonantsignalamplifierbandwidthdetectiondetectorsgravitational
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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.

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    hep-ph 2019-08 conditional novelty 6.0 of 10

    A driven, shielded electromagnetic deflector can create propagating dark-matter millicharge and millicurrent waves that penetrate shields and are detectable with resonant LC circuits, extending direct-detection reach ...

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