On the Massive Antenna Suspension System in the Brazilian Gravitational Wave Detector SCHENBERG

SCHENBERG is a resonant-mass gravitational wave detector built in Brazil. Its spherical antenna, weighting 1.15 t, is connected to the outside world by a suspension system whose main function is to attenuate the external seismic noise. In this work, we report how the system was modeled using finite...

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Bibliographic Details
Published inBrazilian journal of physics Vol. 46; no. 3; pp. 308 - 315
Main Authors da Silva Bortoli, Fabio, Frajuca, Carlos, de Sousa, Sergio Turano, de Waard, Arlette, Magalhaes, Nadja Simao, de Aguiar, Odylio Denys
Format Journal Article
LanguageEnglish
Published New York Springer US 01.06.2016
Subjects
General and Applied Physics
Physics
Physics and Astronomy
Gravitational wave detector
SCHENBERG suspension
Gravitational wave suspension
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Summary:SCHENBERG is a resonant-mass gravitational wave detector built in Brazil. Its spherical antenna, weighting 1.15 t, is connected to the outside world by a suspension system whose main function is to attenuate the external seismic noise. In this work, we report how the system was modeled using finite elements method. The model was validated on experimental data. The simulation showed that the attenuation obtained is of the order of 260 dB, which is sufficient for decreasing the seismic noise below the level of the thermal noise of the detector operating at 50 mK.
ISSN:0103-9733
1678-4448
DOI:10.1007/s13538-016-0413-8