Increasing the bandwidth of resonant gravitational antennas: The case of Explorer
P. Astone, D. Babusci, M. Bassan, P. Carelli, G. Cavallari, E. Coccia,, C. Cosmelli, S. D'Antonio, V. Fafone, A.C. Fauth, G. Federici, G. Giordano,, A. Marini, Y. Minenkov, I. Modena, G. Modestino, A. Moleti, G.V. Pallottino,, G. Pizzella, L. Quintieri, A. Rocchi, F. Ronga
TL;DR
This paper reports on the upgrade of the Explorer resonant gravitational wave detector, significantly increasing its bandwidth and sensitivity, and discusses potential future improvements to enhance its observational capabilities.
Contribution
The paper presents a new read-out configuration for the Explorer detector that achieves an unprecedented bandwidth of over 55 Hz with high sensitivity.
Findings
Spectral sensitivity better than 10^{-20} /sqrt(Hz) over 55 Hz bandwidth
Successful implementation of a new read-out system
Discussion of future upgrades for larger bandwidths
Abstract
Resonant gravitational wave detectors with an observation bandwidth of tens of hertz are a reality: the antenna Explorer, operated at CERN by the ROG collaboration, has been upgraded with a new read-out. In this new configuration, it exhibits an unprecedented useful bandwidth: in over 55 Hz about its frequency of operation of 919 Hz the spectral sensitivity is better than 10^{-20} /sqrt(Hz) . We describe the detector and its sensitivity and discuss the foreseable upgrades to even larger bandwidths.
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