Tunable mechanical monolithic sensor with interferometric readout for low frequency seismic noise measurement

F. Acernese; R. De Rosa; G. Giordano; R. Romano; F. Barone

doi:10.1117/12.800429

10 October 2008 Tunable mechanical monolithic sensor with interferometric readout for low frequency seismic noise measurement

F. Acernese, R. De Rosa, G. Giordano, R. Romano, F. Barone

Author Affiliations +

Proceedings Volume 7110, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology VIII; 711011 (2008) https://doi.org/10.1117/12.800429
Event: SPIE Remote Sensing, 2008, Cardiff, Wales, United Kingdom

Abstract

This paper describes a mechanical horizontal monolithic sensor for geophysical applications developed at the University of Salerno. 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 (≈10-12 m/square root Hz in the band 10^-1 ÷10Hz as seismometer. The first results as accelerometer (force feed-back configuration) are also presented and discussed.

Citation Download Citation

F. Acernese, R. De Rosa, G. Giordano, R. Romano, and F. Barone "Tunable mechanical monolithic sensor with interferometric readout for low frequency seismic noise measurement", Proc. SPIE 7110, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology VIII, 711011 (10 October 2008); https://doi.org/10.1117/12.800429

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available