Superconducting cavity transducer for resonant gravitational radiation antennas

TL;DR

This paper presents a new superconducting cavity transducer designed to enhance the bandwidth and sensitivity of resonant gravitational wave antennas, including a dynamic model, stability analysis, and a prototype test bench.

Contribution

It introduces a fully coupled dynamic model of the antenna-transducer system and provides a prototype design for experimental validation.

Findings

Estimated signal-to-noise ratios for various configurations

Stability conditions for the transducer system

Design specifications for the prototype cavity

Abstract

Parametric transducers, such as superconducting rf cavities, can boost the bandwidth and sensitivity of the next generation resonant antennas, thanks to a readily available technology. We have developed a fully coupled dynamic model of the system "antenna--transducer" and worked out some estimates of signal--to--noise ratio and the stability conditions in various experimental configurations. We also show the design and the prototype of a rf cavity which, together with a suitable read--out electronic, will be used as a test bench for the parametric transducer.