Author/Authors :
Bougleux، نويسنده , , E and Braccini، نويسنده , , S and Bradaschia، نويسنده , , C and Casciano، نويسنده , , C and Cella، نويسنده , , G and Dattilo، نويسنده , , V and DeSalvo، نويسنده , , R and Di Virgilio، نويسنده , , A and Feng، نويسنده , , G.T and Fidecaro، نويسنده , , F and Frasconi، نويسنده , , F and Gaddi، نويسنده , , A and Giazotto، نويسنده , , A and Holloway، نويسنده , , L and La Penna، نويسنده , , P and Losurdo، نويسنده , , G and Malik، نويسنده , , S and Palla، نويسنده , , F and Passaquieti، نويسنده , , R and Raffaelli، نويسنده , , F and Stanga، نويسنده , , R and Valentini، نويسنده , , R and Vicere’، نويسنده , , A، نويسنده ,
Abstract :
The VIRGO SuperAttenuator is a complex six-degrees of freedom remote-controlled mechanism that isolates a 80 kg payload from environmental perturbations, such as the seismic noise. It consists of a Pre-Isolator stage, a chain of mechanical filters and a last stage, holding the payload. The Pre-Isolator and the filters are essentially harmonic oscillators with a low resonant frequency. The filters are designed to work below 500 mHz in all degrees of freedom. During the last year, a Pre-Isolator with resonant frequencies of 30 mHz in three degrees of freedom has been engineered and built. Intensive studies on the long-term spring behaviour have been performed to find a metal suitable to be stressed up to 1 kN/mm2 with no evidence of creep.
