| Grant number: | 10/00167-4 |
| Support Opportunities: | Regular Research Grants |
| Start date: | August 01, 2010 |
| End date: | 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 |
| City of the host institution: | São Paulo |
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)
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