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The Brazilian gravitational wave detector Mario Schenberg: progress and plans

O D Aguiar1, L A Andrade5, J J Barroso1, F Bortoli6, L A Carneiro1, P J Castro1, C A Costa1, K M F Costa3, J C N de Araujo1, A U de Lucena1, W de Paula3, E C de Rey Neto1, S T de Souza1, A C Fauth4, C Frajuca6, G Frossati8, S R Furtado1, N S Magalhães3, R M Marinho Jr3, E S Matos1, J L Melo1, O D Miranda1, N F Oliveira Jr2, B W Paleo1, M Remy1, K L Ribeiro1, C Stellati3, W F Velloso Jr7 and J Weber1

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The Schenberg gravitational wave detector is almost completed for operation at its site in the Physics Institute of the University of São Paulo, under the full support of FAPESP (the São Paulo State Foundation for Research Support). We have been working on the development of a transducer system, which will be installed after the arrival of all the microwave components and the completion of the transducer mechanical parts. The initial plan is to operate a CuAl6% two-mode parametric transducer in a first operational run at 4.2 K with nine transducers and an initial target sensitivity of h ~ 2 × 10−21 Hz−1/2 in a 50 Hz bandwidth around 3.2 kHz. Here we present details of this plan and some recent results of the development of this project.


PACS

04.80.Nn Gravitational wave detectors and experiments

95.55.Ym Gravitational radiation detectors; mass spectrometers; and other instrumentation and techniques

MSC

83C35 Gravitational waves

Subjects

Instrumentation and measurement

Gravitation and cosmology

Astrophysics and astroparticles

Dates

Issue 10 (21 May 2005)

Received 29 October 2004, in final form 13 January 2005

Published 21 April 2005



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