Giordano, Gerardo (2008) Development and test of tunable mechanical monolithic horizontal accelerometer for low frequency seismic noise measurement. [Tesi di dottorato] (Unpublished)
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| Item Type: | Tesi di dottorato |
|---|---|
| Resource language: | English |
| Title: | Development and test of tunable mechanical monolithic horizontal accelerometer for low frequency seismic noise measurement |
| Creators: | Creators Email Giordano, Gerardo gerardo.giordano@na.infn.it |
| Date: | 30 November 2008 |
| Institution: | Università degli Studi di Napoli Federico II |
| Department: | Scienze fisiche |
| Scuola di dottorato: | Rischio sismico |
| Dottorato: | Rischio sismico |
| Ciclo di dottorato: | 21 |
| Coordinatore del Corso di dottorato: | nome email Gasparini, Paolo paolo.gasparini@na.infn.it |
| Tutor: | nome email Barone, Fabrizio fabrizio.barone@na.infn.it Milano, Leopoldo leopolo.milano@na.infn.it |
| Date: | 30 November 2008 |
| Keywords: | Seismometer , Accelerometer , low frequency , Folded Pendulum , Optical Lever , Michelson Interferometer , Control |
| Settori scientifico-disciplinari del MIUR: | Area 02 - Scienze fisiche > FIS/07 - Fisica applicata (a beni culturali, ambientali, biologia e medicina) Area 02 - Scienze fisiche > FIS/06 - Fisica per il sistema terra e il mezzo circumterrestre |
| Date Deposited: | 16 Nov 2009 09:16 |
| Last Modified: | 30 Apr 2014 19:36 |
| URI: | http://www.fedoa.unina.it/id/eprint/3365 |
| DOI: | 10.6092/UNINA/FEDOA/3365 |
Collection description
This thesis describes a mechanical horizontal monolithic sensor for geophysical applications. The instrument is basically a monolithic tunable folded pendulum, shaped with precision machining and electric-discharge-machining, that can be used both as seismometer and, in a force-feedback configuration, as accelerometer. It is a very compact instrument, very sensitive in the low-frequency seismic noise band, with a very good immunity to environmental noises, whose main characteristics are the tunability of the resonance frequency and the integrated laser optical readout, consisting of an optical lever and an interferometer. The theoretical sensitivity curves are in a very good agreement with the measurements. A direct comparison of its performances with the STS-2 ones shows that better performances have been reached with the interferometric readout, about 10e-12 m/sqrt(Hz) in the band [0.01,10] Hz as seismometer. The first results as accelerometer (force feed-back configuration) are also presented and discussed.
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