In 2025, the Advanced Virgo Plus (AdV+) gravitational-wave detector will enter Phase II, a thermal noise reduction upgrade involving the increase of the terminal mirror masses from 42 kg to 104 kg. This requires a revision of the SuperAttenuator (SA), the main attenuation system in AdV+, currently capable of reducing seismic noise by more than ten orders of magnitude in all six degrees of freedom above a few Hz. We briefly report the multiple updates of SA parts that have been planned to keep performance unchanged. As part of the study, simulations and/or design of upgraded elastic (maraging blades) and counter-elastic (magnetic antisprings) components were carried out, leading to a revision plan of all the filters in terminal SAs and notably of Filter 7 (F7), the lowest one. Prototyping and tests of the upgraded F7 and blades are underway at this time to validate the outputs of the study.
The seismic isolation system of Advanced Virgo Plus, Phase II
Chessa, Piero
;
2023
Abstract
In 2025, the Advanced Virgo Plus (AdV+) gravitational-wave detector will enter Phase II, a thermal noise reduction upgrade involving the increase of the terminal mirror masses from 42 kg to 104 kg. This requires a revision of the SuperAttenuator (SA), the main attenuation system in AdV+, currently capable of reducing seismic noise by more than ten orders of magnitude in all six degrees of freedom above a few Hz. We briefly report the multiple updates of SA parts that have been planned to keep performance unchanged. As part of the study, simulations and/or design of upgraded elastic (maraging blades) and counter-elastic (magnetic antisprings) components were carried out, leading to a revision plan of all the filters in terminal SAs and notably of Filter 7 (F7), the lowest one. Prototyping and tests of the upgraded F7 and blades are underway at this time to validate the outputs of the study.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
