Passive, nonlinear, mechanical structures for seismic attenuation
- Creators
- DeSalvo, Riccardo
Abstract
Gravitational wave detectors aim to detect strain perturbations of space-time on the order of 10^-21-10^-22 at frequencies between 1 Hz and a few kHz. This space-time strain, integrated over kilometer scale interferometers, will induce movements of suspended mirrors on the order of 10^-18-10^-19 m. Seismic motion in this frequency band varies between 10^-6 m and 10^-12 m. Required seismic attenuation factors, as large as 10^-12, by far exceed the performance of motion sensors, and are only obtained by means of a chain of passive attenuators. High quality springs in configurations Yielding nonlinear response are used to generate attenuation at low frequency. Similarly, nonlinear mechanisms are used in the horizontal direction, A description of I some of these systems and some of the technical challenges that they involve is presented.
Additional Information
© 2008 ASME. Received 18 October 2005; revised 10 January 2007. I would like to thank my numerous students and postdocs. Over the years they made all the work and generated all the understanding at the base of the present good performance of these devices possible. While not diminishing the smaller but equally important contributions from the other collaborators, I would like to single out, in alphabetical order, A. Bertolini, G.C. Cella, M. Mantovani, S. Marka, V. Sannibale, and H. Tarik. The LIGO Observatories were constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation under Cooperative Agreement No. PHY 9210038. The LIGO Laboratory operates under Cooperative Agreement No. PHY-0107417. This paper has been assigned LIGO Document No. LIGO-P050001-00-D.Attached Files
Published - SALjcnd08.pdf
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Additional details
- Eprint ID
- 13534
- Resolver ID
- CaltechAUTHORS:SALjcnd08
- PHY 9210038
- NSF
- PHY-0107417
- NSF
- Created
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2009-04-21Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field