arXiv subjects

A. D. V. Di Virgilio

Publications and source records attributed to A. D. V. Di Virgilio.

3 recordsLinked to original sources

arXiv2026

First results of a high sensitivity and transportable Ring Laser Gyroscope

Within the GINGER project, aimed at installing an array of large frame ring laser gyroscopes for fundamental physics tests and as part of a geophysics observatory located in the underground laboratory at Gran Sasso, Italy (LNGS-INFN), we are developing a ring laser gyroscope design to reduce spurious rotation of instrumental origin and the ability to extend the cavity side length from 1.5 up to 5 m, thanks to the implementation of suitable spacers. The new design led to a prototype, called TRIO, with a side length of 1.52 m, conceived as a transportable instrument. The present paper reports on several preliminary measurements of the Earth angular velocity carried out with TRIO. Results have the twofold objective to assess the instrument performance in the present geometrical configuration and to test validity of the design in view of the GINGER project. To this aim, data obtained with TRIO are compared with typical data acquired with other, previously made, gyroscope prototypes, including the large frame GINGERINO already in operation at the Gran Sasso underground site.

physics.ins-det↗

arXiv2023

Status of the GINGER project

GINGER (Gyroscopes IN GEneral Relativity), based on an array of large dimension ring laser gyroscopes, is aiming at measuring in the Gran Sasso underground laboratory the Earth angular velocity with unprecedented sensitivity in order to record the general relativity effects on top of the Earth crust; 1 part $10^9$ of the Earth surface is the goal to access the signals expected by general relativity, due to deSitter and Lense-Thirring effects, this target is also valuable for Lorentz Violation in the gravity sector. GINGER is an multi-disciplinar project. Being attached to the Earth crust, it will provide useful data for geophysical investigation, and it will be one of the instruments in the recently proposed multi-components geophysical observatory of GranSasso. It is expected that the realisation of GINGER will take 18 months, and 3 years will take to reach the relative sensitivity of 1 part in $10^{11}$.

gr-qc↗

arXiv2022

Overcoming 1 part in $10^9$ of Earth angular rotation rate measurement with the G Wettzell data

The absolute measurement of the Earth angular rotation rate with ground-based instruments becomes challenging if the 1 part in $10^9$ of precision has to be obtained. This threshold is important for fundamental physics and for geodesy, to investigate effects of General Relativity and Lorentz violation in the gravity sector and to provide the fast variation of the Earth rotation rate. High sensitivity Ring Laser Gyroscopes (RLG) are currently the only promising technique to achieve this task in the near future, but their precision has been so far limited by systematics related to the laser operation. In this paper we analyze two different sets of observations, each of them three days long. They were obtained from the G ring laser at the Geodetic Observatory Wettzell. The applied method has been developed for the GINGERINO ring laser in order to identify and extract the laser systematics. For the available data sets the residuals show mostly white noise behavior and the Allan deviation drops below 1 part in $10^9$ after an integration time of about $10^4$~s.

physics.geo-ph↗