@InProceedings{FurtadoAgui:2006:PrRe,
author = "Furtado, S{\'e}rgio Ricardo and Aguiar, Odylio Denys",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)}",
title = "Development of a very high sensitivity parametric transducer for
the Mario Schenberg gravitational wave detector: progress report",
booktitle = "Anais...",
year = "2006",
organization = "Reuni{\~a}o Anual da Sociedade Astron{\^o}mica Brasileira, 32.",
abstract = "We have constructed the Mario Schenberg gravitational wave
detector at the Physics Institute of the University of S{\~a}o
Paulo as programmed by the Brazilian Graviton Project, under the
full support of FAPESP. We are ready to do a first test run of the
spherical antenna at 4.2K with three parametric transducers and an
initial target sensitivity of h~10-21Hz-1/2 in a 60Hz bandwidth
around 3.2kHz. The parametric transducers to be used on the Mario
Schenberg detector consist of reentrant klystron copperaluminum
cavities having a central post with a narrow gap (~40mm) between
its top and an oscillating end wall, mechanically coupled to the
gravitational wave spherical antenna at its quadrupolar mode
resonant frequency. The performance of the transducer depends on
some cavity parameters such as the electrical Q, the electrical
coupling and cavity dimensions. Here we present some recent
results of the development of this project, such as niobium layer
deposition in the transducer cavities, the design of silicon
membranes for the last transducer mechanical mode, and measurement
and tunning of the mechanical and electric resonances
frequencies.",
conference-location = "Atibaia, SP",
conference-year = "30 jul - 03 ago",
label = "self-archiving-INPE-MCTIC-GOV-BR",
language = "pt",
organisation = "Sociedade Astron{\^o}mica Brasileira",
targetfile = "furtado-development.pdf",
urlaccessdate = "27 abr. 2024"
}