Open AccessModelling a mechanical antenna for a calibrator for interferometric gravitational wave detector using finite elements method
Author(s) -
A. R. Prado,
F. S. Bortoli,
Nadja S. Magalhães,
Raimundo Duarte,
Carlos Frajuca,
Renato Chaves Souza
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2090/1/012157
Subject(s) - detector , antenna (radio) , physics , gravitational wave , interferometry , sensitivity (control systems) , calibration , optics , acoustics , vibration , signal (programming language) , gravitational wave observatory , amplitude , electronic engineering , computer science , engineering , telecommunications , quantum mechanics , astrophysics , programming language
Interferometric gravitational wave detectors (IGWD) are a very complex detector, the need to lock the detector in a dark fringe condition besides the vibrations that affect the mirrors, creates the necessity of using active suspension systems. These active systems make the system reach the desired sensitivity but make the calibration of such detectors much more difficult. To solve this problem a calibrator is proposed, a resonant mass gravitational wave detector could be used to detect the same signal in a narrower band and use the measured amplitude to calibrate the IGWD, as resonant mass gravitational wave detectors are easily calibrated. This work aims to design the mechanical antenna of such a calibrator. The main difficulty is to design the calibrator is the frequencies required to make the detection. These massive detectors usually were made in frequencies close to 1 kHz and the frequency range to operate for better sensitivity is around 100 Hz. The antenna is modelled in finite elements method and a design of such an antenna is presented.