Recent progress on the R&D program of the seismic attenuation system (SAS)proposed for the advanced gravitational wave detector, LIGO II

Citation
A. Bertolini et al., Recent progress on the R&D program of the seismic attenuation system (SAS)proposed for the advanced gravitational wave detector, LIGO II, NUCL INST A, 461(1-3), 2001, pp. 300-303
Citations number
2
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
0168-9002 → ACNP
Volume
461
Issue
1-3
Year of publication
2001
Pages
300 - 303
Database
ISI
SICI code
0168-9002(20010401)461:1-3<300:RPOTRP>2.0.ZU;2-4
Abstract
High-performance Seismic Isolation Systems in gravitational wave interferom eters are needed not only to increase the sensitivity of the detectors but also to guarantee long periods of stable operation. SAS is essentially a sy stem which produces the required in-band seismic isolation by use of passiv e mechanical filters and actively reduces the out of band seismic noise usi ng inertial damping. The passive isolation is achieved for all the 6 degree s of freedom, with an Inverted Pendulum and a chain of single wire pendula whose masses are the Geometrical Anti-Spring Filters (GASF). The active con trol is applied to reduce mainly the noise below 4 Hz and to damp the reson ances of the chain acting from the inverted pendulum table. Here we present a brief overview of SAS and recent results achieved from the full scale SA S prototype. (C) 2001 Elsevier Science B.V. All rights reserved.