Volume 318 - Corfu Summer Institute 2017 "Schools and Workshops on Elementary Particle Physics and Gravity" (CORFU2017) - Workshop on Testing Fundamental Physics Principles
GINGER - Toward an experimental test of General Relativity
A. Porzio*, C. Altucci, S. Capozziello, R. Velotta, A. Basti, A. Di Virgilio, N. Beverini, G. Carelli, D. Ciampini, F. Fuso, U. Giacomelli, E. Maccioni, F. Stefani, G. Terreni and A. Ortolan
Full text: pdf
Pre-published on: August 22, 2018
Published on: August 24, 2018
Abstract
GINGER (Gyroscopes IN General Relativity) is a proposal for measuring
the Lense-Thirring effect using an array of ring laser-gyroscopes. Those are,
nowadays, the most sensitive inertial sensors to measure the rotation rate
of the Earth.
The Lense-Thirring contribution to the Earth gravitational field marks itself as a tiny
DC perturbation onto $\Omega$, the Earth rotation rate. Its magnitude is 10$^{-9} \times \Omega$
so that to be able to discriminate it a very high sensitivity and
long measurement times in order to move toward low frequency are required.
For such an experiment, an underground
location guarantees further isolation from anthropic as well as environmental
disturbances.
GINGERINO is a single axis ring laser located inside the the
INFN Gran Sasso laboratory. It has demonstrated that the very high thermal
stability of the cave allows continuous operation, and sensitivity well below
fractions of nrad/s are feasible with duty cycle above $90\%$ even without stabilisation of the scale factor of the ring laser.
Here we show the GINGER experiment concept together with the first evaluation of the
GINGERINO sensitiviy that shows how such a device can be of use also in earth science and related phenomena.
DOI: https://doi.org/10.22323/1.318.0181
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