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A method to design mechanical transducers for resonant‐mass gravitational wave detectors
Author(s) -
Bortoli Fabio S.,
Frajuca Carlos,
Magalhaes Nadja S.
Publication year - 2021
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.202113891
Subject(s) - physics , detector , transducer , gravitational wave , gravitational wave observatory , quadrupole , microwave , acoustics , optics , astrophysics , atomic physics , quantum mechanics
In this work, a methodology to design two‐mode mechanical transducers for the spherical resonant‐mass gravitational wave detector SCHENBERG is presented. This detector uses microwave multiparametric sensors and has 17 mechanical modes together with 6 electromagnetic modes for the microwave cavities. These transducers, when placed on the spherical surface of the detector, must have an effective mass ratio between their modes constant to provide the better amplification and compose a resonant system that has characteristics necessary for the detection of gravitational waves. To meet this demand, the transducers must form a resonant system with exactly the same quadrupole frequencies of the sphere. This work describes how these transducers were designed using Finite Element Modeling (FEM).