Measurements of Superattenuator seismic isolation by Virgo interferometer

Publication Type:

Journal Article

Source:

Astroparticle Physics, Volume 33, Number 3, p.182 - 189 (2010)

URL:

http://www.sciencedirect.com/science/article/B6TJ1-4Y8G5TJ-1/2/36f5cd85cb5f9260c680fe904db69f4e

Keywords:

Seismic isolation

Abstract:

Each mirror of the interferometric gravitational wave antenna Virgo is attached to a Superattenuator, a chain of mechanical filters designed to suppress seismic vibrations, starting from a few Hz. The filter chain attenuation has been measured by exciting its suspension point with sinuisodal forces and using the interferometer as sensor. The attenuation, measured at different frequencies, is compliant with the requirements of the next generation antenna Advanced Virgo. In the third generation detector Einstein Telescope, the attenuation is sufficient above 3