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Monolithic folded pendulum accelerometers for seismic monitoring and active isolation systems

Bertolini, Alessandro and DeSalvo, Riccardo and Fidecaro, Francesco and Takamori, Akiteru (2006) Monolithic folded pendulum accelerometers for seismic monitoring and active isolation systems. IEEE Transactions on Geoscience and Remote Sensing, 44 (2). pp. 273-276. ISSN 0196-2892. doi:10.1109/TGRS.2005.861006.

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A new class of very low noise low-frequency force-balance accelerometers is presented. The device has been designed for advanced mirror isolation systems of interferometric gravitational wave detectors. The accelerometer consists of a small monolithic folded pendulum with 2 s of natural period and an in-vacuum mechanical quality factor of 3000. The folded pendulum geometry, combined with the monolithic design, allows a unique 0.01% cross-axis residual coupling. Equipped with a high-resolution capacitance position sensor, it is capable of a noise-equivalent inertial displacement of 1-nm root mean square integrated over all the frequencies above 0.01 Hz. The main features of this new accelerometer are here reviewed. New possible applications of monolithic folded pendula in geophysical instrumentation are discussed.

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Additional Information:© Copyright 2006 IEEE. Reprinted with permission. Manuscript received April 12, 2005; revised August 26, 2005. [Posted online: 2006-01-23] This work was supported in part by the U.S. National Science Foundation under Grant LIGO PHY-0107417.
Subject Keywords:Accelerometer, pendulum, tiltmeter
Issue or Number:2
Record Number:CaltechAUTHORS:BERieeetgrs06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5606
Deposited By: Archive Administrator
Deposited On:25 Oct 2006
Last Modified:08 Nov 2021 20:27

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