Optimization of mechanical impedance matchers for parametric transducers in gravitational wave spherical detectors

• Grant number: 10/00167-4
• Support Opportunities: Regular Research Grants
• Duration: August 01, 2010 - July 31, 2011
• Field of knowledge: Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
• Principal Investigator: Carlos Frajuca
• Grantee: Carlos Frajuca
• Host Institution: Instituto Federal de Educação, Ciência e Tecnologia de São Paulo (IFSP). Campus São Paulo. São Paulo , SP, Brazil

Abstract

It is being built in the Physics Institute of Sao Paulo University a resonant-mass spherical gravitational wave detector that will be part of a detection network with a similar one being built in The Nederlands. The goal of such detector is to reach a sensitivity , in h, of 10-21, in frequencies close to 3200 Hz with a band of 200 Hz. The expected sensitivity of each detector will be close to the quantum limit, and for such sensitivity to be reached, many parameters must be optimized, between then are the calibration of the mechanical impedance matchers (mechanical oscilators), assembled on the sphere surface with the purpose to couple the oscilations of the sphere surface to the eletromechanical transducers (used as movement sensors); the chosen transducer is the microwave parametric, another important factor is the electrical quality factor. This work has the goal to optimize such mechanical coupling as the detector sensitivity. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

FRAJUCA, C.; PIRES, R.; BORTOLI, F. S.; MAGALHAES, N. S.; MARINHO, R. M., JR.; OLIVEIRA, F. G.; HANNAM, M; SUTTON, P; HILD, S; VANDENBROECK, C. Optimization of Mechanical Impedance Matchers for Parametric Transducers in Gravitational Wave Spherical Detectors. WAKE CONFERENCE 2021, v. 363, p. 7-pg., 2012-01-01. (10/00167-4, 11/07731-5)

BORTOLI, FABIO DA SILVA; FRAJUCA, CARLOS; DE SOUSA, SERGIO TURANO; DE WAARD, ARLETTE; MAGALHAES, NADJA SIMAO; DE AGUIAR, ODYLIO DENYS. On the Massive Antenna Suspension System in the Brazilian Gravitational Wave Detector SCHENBERG. Brazilian Journal of Physics, v. 46, n. 3, p. 308-315, JUN 2016. (10/00167-4)