Superconducting cavity transducer for resonant gravitational radiation antennas

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.

7 pages, 3 eps figures. Presented at the 6th Amaldi Conference on Gravitational Waves (2005). Accepted for publication in Journal of Physics: Conference Series