Resonant transducers for spherical gravitational wave detectors

AUTOR(ES)

Frajuca, Carlos, Bortoli, Fabio da Silva, Magalhães, Nadja Simão

FONTE

Brazilian Journal of Physics

DATA DE PUBLICAÇÃO

2005-12

RESUMO

"Mario Schenberg" is a spherical gravitational wave (GW) detector that will be part of a GW detection array of two detectors. Another one is been built in The Netherlands. Spherical gravitational wave detector is a resonant-mass detector, which signal comes when the GW passes through and causes vibrations in a spherical mass. The resonant frequencies of this array will be around 3.2 kHz with a bandwidth of about 200 Hz. This range of frequencies is new in a field where the typical frequencies lay below 1 kHz, making the transducer development some more complex. In this work we made a series of fine element studies in sphere coupled to a resonant mushroom shape resonator that will work as a mechanical impedance matcher between the sphere and the transducer. We describe the search for a shape in the impedance matcher that will improve the performance of the detector.

Documentos Relacionados

• Investigation of ultra-high sensitivity klystron cavity transducers for broadband resonant-mass gravitational wave detectors.
• Challenges in signal analysis of resonant-mass gravitational wave detectors
• Calculation of the noise of a gravitational wave spherical antenna coupled to parametric transducers
• Cálculo do ruído de uma antena esférica para ondas gravitacionais acoplada a transdutores paramétricos
• Sinais de raios cosmicos em detectores de ondas gravitacionais