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Analysis of 90 day operation of the GINGERINO gyroscope
- Source :
- Applied optics. 57(20)
- Publication Year :
- 2018
-
Abstract
- Gyroscopes IN GEneral Relativity (GINGER) is a proposed experiment with the aim of measuring in a ground laboratory the gravitoelectric and gravitomagnetic effects foreseen by general relativity through an array of ring laser gyroscopes. GINGERINO is a square ring-laser prototype that has been built to investigate the level of noise inside the Gran Sasso underground laboratory. GINGERINO has shown the advantage of the underground location. Now it provides suitable data for geophysics and seismology. Since May 2017, it has continuously acquired data. The analysis of the first 90 days shows that the duty cycle is higher than 95%, and the quantum shot noise limit is of the order of 10−10(rad/s)/Hz. It is located in a seismically active area, and it recorded part of the central Italy earthquakes. Its high sensitivity in the frequency band of fraction of hertz makes it suitable for seismology studies. The main purpose of the present analysis is to investigate the long-term response of the apparatus. Simple and fast routines to suppress the disturbances coming from the laser have been developed. The Allan deviation of the raw data reaches some 10−6 after about 106 s of integration time, while the processed data show an improvement of 1 order of magnitude. Disturbances at the daily time scale are present in the processed data, and the expected signal induced by polar motion and solid Earth tides is covered by those disturbances.
- Subjects :
- Time delay and integration
Frequency band
Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
010502 geochemistry & geophysics
01 natural sciences
law.invention
010309 optics
Optics
law
Atomic and Molecular Physics
0103 physical sciences
Electrical and Electronic Engineering
Allan variance
0105 earth and related environmental sciences
Physics
Sagnac effect
business.industry
Noise (signal processing)
Gyroscope
Geodesy
Duty cycle
Polar motion
and Optics
business
Subjects
Details
- ISSN :
- 15394522
- Volume :
- 57
- Issue :
- 20
- Database :
- OpenAIRE
- Journal :
- Applied optics
- Accession number :
- edsair.doi.dedup.....058a9e0fcd1eadb7a9c8b28b644d69ec