Inertial control of the mirror suspensions of the VIRGO interferometer forgravitational wave detection

Citation
G. Losurdo et al., Inertial control of the mirror suspensions of the VIRGO interferometer forgravitational wave detection, REV SCI INS, 72(9), 2001, pp. 3653-3661
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
REVIEW OF SCIENTIFIC INSTRUMENTS
ISSN journal
0034-6748 → ACNP
Volume
72
Issue
9
Year of publication
2001
Pages
3653 - 3661
Database
ISI
SICI code
0034-6748(200109)72:9<3653:ICOTMS>2.0.ZU;2-5
Abstract
In order to achieve full detection sensitivity at low frequencies, the mirr ors of interferometric gravitational wave detectors must be isolated from s eismic noise. The VIRGO vibration isolator, called the superattenuator, is fully effective at frequencies above 4 Hz. But the residual motion of the m irror at the mechanical resonant frequencies of the system is too large for the interferometer locking system and must be damped. A multidimensional f eedback system, using inertial sensors and digital processing, has been des igned for this purpose. An experimental procedure for determining the feedb ack control of the system has been defined. In this article a full descript ion of the system is given and experimental results are presented. (C) 2001 American Institute of Physics.