For ground-based GW detectors, seismic vibration is the dominating source
of noise in low frequency region (0.1 to 10 Hz), limiting both sensitivity
and duty cycle. Thanks to high performant suspension systems, like the
Virgo Superattenuator, the presently operational 2nd generation advanced
GW antennas have extended their detection band down to 10 Hz. The plan for
future 3rd generation...
Characterizing the geological subsurface setting of a stratified aquifer and the structures that guide the flow paths is crucial for the realization of underground infrastructures such as the Einstein Telescope (ET), that is the European third-generation underground interferometric detector of gravitational waves. The triangular setting of this infrastructure (10 km long sides) has vertices...
As a prototype of the Archimedes experiment, a high sensitivity balance has been constructed. This balance can be used as a tiltmeter and nowadays it is installed at the SAR-GRAV laboratory in Sardinia. The laboratory is settled at the Sos-Enattos site (Lula, Nuoro), a former mine located in a region characterized by low seismic noise. The tiltmeter is a beam balance with an interferometric...
The main scientific goal of Archimedes experiment, installed in the SarGrav laboratory in Sardinia (one of the quietest places in Europe and candidate site for the third generation GW detector Einstein Telescope), is to investigate whether and how vacuum fluctuations interact with gravity.
A high sensitive balance will measure the small weight variations of two YBCO superconducting disks...
We present an extended report on the magnetic noise at the SoS Enattos site, using data collected underground (-111 m) from 2020/09/22 to 2021/11/01 for the N-S magnetic component. To track the time evolution of the noise, we use the Band-Limited Root Mean Square (BLRMS) analizing different frequency bands. We show the diurnal and seasonal variability of the first Schumann resonances. The...
The Archimedes experiment aims at measuring the interaction between vacuum fluctuations
and gravity. Archimedes will measure the force exerted by the gravitational field on a Casimir
cavity whose vacuum energy is modulated with a superconductive transition, by using a
balance as a small force detector. If the vacuum energy does interact with gravity, a force
directed upwards acts on...
