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First results of a high sensitivity and transportable Ring Laser Gyroscope
A. Basti, G. Carelli, G. Di Somma +6
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 un…
A high sensitivity tool for geophysical applications: A geometrically locked Ring Laser Gyroscope
E. Maccioni, N. Beverini, G. Carelli +3
This work demonstrates that a middle size ring laser gyroscope (RLG) can be a very sensitive and robust instrument for rotational seismology, even if it operates in a quite noisy e…
Deep underground rotation measurements: GINGERino ring laser gyroscope in Gran Sasso
Jacopo Belfi, Nicolo' Beverini, Filippo Bosi +11
GINGERino is a large frame laser gyroscope investigating the ground motion in the most inner part of the underground international laboratory of the Gran Sasso, in central Italy. I…
First Results of GINGERino, a deep underground ringlaser
J. Belfi, N. Beverini, F. Bosi +11
Large ring-laser gyroscopes are capable of measuring angular rotations with a precision well below fractions of , not far from , the accuracy required for…
Interferometric length metrology for the dimensional control of ultra-stable Ring Laser Gyroscopes
J. Belfi, N. Beverini, D. Cuccato +4
We present the experimental test of a method for controlling the absolute length of the diagonals of square ring laser gyroscopes. The purpose is to actively stabilize the ring cav…
Compensation of the laser parameters fluctuations in large ring laser gyros: a Kalman filter approach
Alessandro Beghi, Jacopo Belfi, Nicolò Beverini +4
He-Ne ring laser gyroscopes are, at present, the most precise devices for absolute angular velocity measurements. Limitations to their performance come from the non--linear dynamic…
Horizontal rotation signals detected by "G-Pisa" ring laser for the Mw=9.0, March 2011, Japan earthquake
J. Belfi, N. Beverini, G. Carelli +5
We report the observation of the ground rotation induced by the Mw=9.0, 11th of March 2011, Japan earthquake. The rotation measurements have been conducted with a ring laser gyrosc…
Measuring the Virgo area tilt noise with a laser gyroscope
Jacopo Belfi, Nicolò Beverini, Filippo Bosi +4
We report on the measurements of tilt noise performed at the Virgo site with a ring laser gyroscope. The apparatus is a He-Ne laser operating in a square cavity mounted on a vertic…
A 1.82 m^2 ring laser gyroscope for nano-rotational motion sensing
Jacopo Belfi, Nicolò Beverini, Filippo Bosi +5
We present a fully active-controlled He-Ne ring laser gyroscope, operating in square cavity 1.35 m in side. The apparatus is designed to provide a very low mechanical and thermal d…