Sannibale, V. and Abbott, B. and Aso, Y. and Boschi, V. and Coyne, D. and DeSalvo, R. and Márka, S. and Ottaway, D. and Stochino, A. (2008) Recent results of a seismically isolated optical table prototype designed for advanced LIGO. Journal of Physics: Conference Series, 122 . 012010. ISSN 1742-6596 http://resolver.caltech.edu/CaltechAUTHORS:20090518-082246999
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The Horizontal Access Module Seismic Attenuation System (HAM-SAS) is a mechanical device expressly designed to isolate a multipurpose optical table and fit in the tight space of the LIGO HAM Ultra-High-Vacuum chamber. Seismic attenuation in the detectors' sensitivity frequency band is achieved with state of the art passive mechanical attenuators. These devices should provide an attenuation factor of about 70dB above 10Hz at the suspension point of the Advanced LIGO triple pendulum suspension. Automatic control techniques are used to position the optical table and damp rigid body modes. Here, we report the main results obtained from the full scale prototype installed at the MIT LIGO Advanced System Test Interferometer (LASTI) facility. Seismic attenuation performance, control strategies, improvements and limitations are also discussed.
|Additional Information:||© 2008 IOP Publishing Ltd. The LIGO Observatories were constructed by the California Institute of Technology and the Massachusetts Institute of Technology with funding from the National Science Foundation under cooperative agreement PHY 9210038. The LIGO Laboratory operates under cooperative agreement PHY-0107417. The authors gratefully acknowledge the support of Carlo Galli and Chiara Vanni of Galli & Morelli s.r.l. during HAM-SAS fabrication phase. This document has been assigned a LIGO DCC number LIGO-P070127-00-Z.|
|Subject Keywords:||attenuators; gravitational wave detectors; seismometers|
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|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||17 Aug 2009 20:01|
|Last Modified:||26 Dec 2012 11:01|
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