A5077851192- Geophysics and Sensor Technology
- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Advanced Fiber Optic Sensors
- Dark Matter and Cosmic Phenomena
- Seismic Waves and Analysis
- Advanced Fiber Laser Technologies
- Advanced Frequency and Time Standards
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Seismology and Earthquake Studies
- Gamma-ray bursts and supernovae
- Advanced Neural Network Applications
- High-pressure geophysics and materials
- Inertial Sensor and Navigation
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Laser-Ablation Synthesis of Nanoparticles
- Radiation Detection and Scintillator Technologies
- Laser-induced spectroscopy and plasma
- Solar and Space Plasma Dynamics
- Geophysics and Gravity Measurements
- Mechanical and Optical Resonators
- Atmospheric Ozone and Climate
- Scientific Research and Discoveries
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2022-2025
Parc Científic de la Universitat de València
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2016-2023
Istituto Nazionale di Fisica Nucleare
2016-2021
Ludwig-Maximilians-Universität München
2016-2020
University of Pisa
2012-2017
Absolute rotation rate sensing with extreme sensitivity requires a combination of several large scale gyroscopes in order to obtain the full vector rotation. We report on construction and operation four-component, tetrahedral laser gyroscope array as five story building situated near surface, underground laboratory. It is demonstrated that reconstruction Earth can be achieved sub-arcsecond resolution over more than six weeks.Received 3 February 2020Accepted 18 June...
ABSTRACT The additional observation of three components rotational ground motions has benefits for tilt-seismometer coupling (e.g., ocean-bottom seismometry and volcano seismology), local site characterization, wavefield separation, source inversion, glacial planetary seismology, as well the monitoring structural health. Field applications have been mostly hampered by lack portable sensors with appropriate broadband operation range weak-motion sensitivity. Here, we present field observations...
Abstract The debate on gravity theories to extend or modify general relativity is very active today because of the issues related ultraviolet and infrared behavior Einstein’s theory. In first case, we have address quantum problem. latter, dark matter energy, governing large-scale structure cosmological evolution, seem escape from any final fundamental theory detection. state art that, up now, no theory, capable explaining gravitational interaction at scale, has been formulated. this...
Double-pulse laser-induced breakdown spectroscopy (LIBS) was recently proposed for the analysis of underwater samples, since it overcomes drawbacks rapid plasma quenching and large continuum emission, typical single-pulse ablation. Despite attractiveness method, this approach suffers nevertheless from a poor spectroscopic reproducibility, which is partially due to scarce reproducibility cavitation bubble induced by first laser pulse, pressure dimensions strongly affect emission. In work, we...
GINGERino is a large frame laser gyroscope investigating the ground motion in most inner part of underground international laboratory Gran Sasso, central Italy. It consists square ring with 3.6 m side. Several days continuous measurements have been collected, apparatus running unattended. The power spectral density seismic bandwidth at level 10−10 (rad/s)/Hz. A maximum resolution 30 prad/s obtained an integration time few hundred seconds. routinely detects rotations induced by both regional...
Gyroscopes IN GEneral Relativity (GINGER) is a proposed experiment with the aim of measuring in ground laboratory gravitoelectric and gravitomagnetic effects foreseen by general relativity through an array ring laser gyroscopes. GINGERINO square ring-laser prototype that has been built to investigate level noise inside Gran Sasso underground laboratory. shown advantage location. Now it provides suitable data for geophysics seismology. Since May 2017, continuously acquired data. The analysis...
We present the analysis of rotational and translational ground motions from earthquakes recorded during October–November 2016, in association with Central Italy seismic sequence. use co-located measurements vertical rotation rate a large ring laser gyroscope three components velocity broad-band seismometer. Both instruments are positioned deep underground environment, within Gran Sasso National Laboratories Istituto Nazionale di Fisica Nucleare. collected dozens events spanning 3.5–5.9...
<div class="page" title="Page 1"><div class="layoutArea"><div class="column"><p><span>Recent advances in large ring laser gyroscopes (RLG) technologies opened the possibility to observe rotations of ground with sensitivities up 10−11 rad/sec over frequency band seismological interest (0.01-1Hz), thus opening way a new geophysical discipline, i.e. rotational seismology. A measure seismology is fundamental for (a) determination all six degrees freedom that...
Abstract GINGERINO is one of the most sensitive Sagnac laser-gyroscopes based on an heterolithic mechanical structure. It a prototype for GINGER, laser gyroscopes array proposed to reconstruct Earth rotation vector and in this way measure General Relativity effects. Many factors affect final sensitivity gyroscopes, particular, when they are used long-term measurements, slow varying environmental parameters come into play. To understand role different terms allows design more effective as...
The sensitivity to angular rotation of the top class Sagnac gyroscope GINGERINO is carefully investigated with standard statistical means, using 103 days continuous operation and available geodesic measurements Earth rate. All features rate are correctly reproduced. fractions frad/s attained for long term runs. This excellent stability put gyroscopes at forefront fundamental physics, in particular tests general relativity Lorentz violation, where plays key role provide reliable data deeper...
In this study, performed on a set of twenty-two earthquakes that occurred in central Italy between 2019 and 2020, we will explore the possibility to locate hypocenter local events by using ring laser gyroscope observing vertical ground rotation standard broadband seismometer. A picking algorithm exploiting four components (4C) polarization properties wavefield is used identify first shear onset transversely polarized (SH). The direction estimated correlation rate transverse acceleration....
GINGER (Gyroscopes IN GEneral Relativity) is a proposal for measuring in ground-based laboratory the Lense-Thirring effect, known also as inertial frame dragging, that predicted by General Relativity, and induced rotation of massive source. will consist an array at least three square ring lasers, mutually orthogonal, with about 6-10 m side, located deep underground site, possibly INFN - National Laboratories Gran Sasso. The tri-axial design provide complete estimation angular velocity, to be...
Gyroscopes IN GEneral Relativity (GINGER) is a proposed experiment with the aim of measuring gravito-electric (known also as De Sitter effect) and gravito-magnetic effects (or Lense – Thirrings in ground laboratory, foreseen by general relativity, through an array large dimension ring laser gyroscopes. The site located inside Gran Sasso laboratories (LNGS) INFN, under more than one thousand meter underground, well protected from surface perturbations. GINGERINO square ring-laser prototype...
Abstract In fall 2018, we have observed, by means of an underground ring laser gyroscope, the microseismic (MS) activity induced Mediterranean Sea in 2–5 s period range. amplitude spectra, a clear peak highly correlated with collocated seismometer appears during large storm ranging from 24 November to 1 December 2018. The both for rotation rate and acceleration, are located at 3.3 s. amplitudes 8×10−10 rad/s−1 3×10−6 ms−2, respectively, vertical horizontal acceleration. We perform source...
Single-component ring lasers have provided high-resolution observations of Earth's rotation rate as well local earthquake- or otherwise-induced rotational ground motions. Here we present the design, construction, and operational aspects ROMY, a four-component, tetrahedral-shaped laser installed at Geophysical Observatory Fürstenfeldbruck near Munich, Germany. Four equilateral, triangular-shaped with 12 m side length provide motions that can be combined to construct complete vector from point...
Abstract This paper presents a quantum efficiency measurement setup based on 2D motorized stage, wide spectrum xenon lamp, beam splitter system, and two calibrated photo-diodes for measuring the (QE) of photomultiplier tubes (1 to 10 inches). We will demonstrate effectiveness technical refinements measurements procedures over some existing setups already shown in literature. The large area covered by stages permit study PMTs with diameter up ten inches. results obtained show high precision...
Two ring laser gyroscopes are being developed by the INFN in view of fundamental Physics applications. The scope this activity is to `fill gap' between present state art technology and requirements sensitivity accuracy needed for general relativity tests. first prototype, called GP2 located at Pisa, dedicated interferometric control cavity form factor. second GINGERino, a larger deep underground (INFN LNGS) has characterizing low frequency rotational noise site. We show most recent results...
Active control of the geometrical parameters large ring-lasers arrays is a challenging task, requiring development an accurate length monitoring system acting on edges these devices. The proposed solution based what was outlined by NASA JPL for its discontinued Space Interferometric Mission (SIM). It will be made up network compact laser heterodyne interferometers, working together to keep frame constantly well known (and fixed) nanometer accuracy. We took first steps towards realization...
Abstract GINGER (Gyroscopes IN GEneral Relativity), based on an array of large dimension ring laser gyroscopes, is aiming at testing Earth General Relativity effects, like the gravito-electric and gravito-magnetic effects (also known as De Sitter Lense-Thirring effects) Lorentz violation. The sensitivity a function size losses optical cavity. In this kind measurement long term stability matter concern, underground location desirable for its natural thermal being isolated from atmospheric...
Abstract The Hamamatsu R14374-02 3-inch photomultiplier tube is an improved version of the previous R12199-02 model. It will be used for completion KM3NeT neutrino telescope. Five hundred photomultipliers have been characterized dark count rate, timing spread, and spurious pulses. quantum efficiency, gain peak-to-valley ratio also measured a sub-sample two PMTs in order to determine parameter values needed as input numerical simulations detector.
The Hamamatsu R14374-02 3-inch photomultiplier tube is an improved version of the previous R12199-02 model. It will be used for completion KM3NeT neutrino telescope. Five hundred photomultipliers have been characterized dark count rate, timing spread, and spurious pulses with a dedicated box apparatus.The results are compared model R12199 in first phase construction KM3NeT.