A5083196138- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Seismic Waves and Analysis
- Geophysics and Sensor Technology
- Astrophysics and Cosmic Phenomena
- High-pressure geophysics and materials
- Radio Astronomy Observations and Technology
- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Seismic Imaging and Inversion Techniques
- Statistical and numerical algorithms
- Superconducting Materials and Applications
- Seismology and Earthquake Studies
- Cold Atom Physics and Bose-Einstein Condensates
- Magnetic confinement fusion research
- Astronomical Observations and Instrumentation
- Black Holes and Theoretical Physics
- Quantum Electrodynamics and Casimir Effect
- Mechanical and Optical Resonators
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- earthquake and tectonic studies
Sapienza University of Rome
2014-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2016-2025
Istituto Nazionale di Geofisica e Vulcanologia
2024
Istituto Nazionale di Fisica Nucleare
2014-2024
HUN-REN Institute for Nuclear Research
2024
INGV Sezione di Pisa
2024
Nicolaus Copernicus Astronomical Center
2024
Polish Academy of Sciences
2024
HUN-REN Wigner Research Centre for Physics
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Perugia
2023
We report correlations in underground seismic measurements with horizontal separations of several hundreds meters to a few kilometers the frequency range 0.01Hz 40Hz. These could threaten science goals planned interferometric gravitational-wave detectors such as Einstein Telescope well atom interferometers MIGA and ELGAR. use from four different sites, i.e. former Homestake mine (USA) two candidate sites for Telescope, Sos Enattos (IT) Euregio Maas-Rhein (NL-BE-DE) site housing detector,...
Cooling down large test masses up to 200 kg, as foreseen for the Einstein Telescope, is a complex challenge combining cutting-edge technological achievements from different disciplines with experience gained both room-temperature and cryogenic-temperature detector development communities. We set an apparatus designed cryogenic mechanical suspensions payload system. They should have high quality factors enable sufficient heat extraction greater than 0.3 W. The facility on university campus...
To improve the sensitivity of future generation gravitational wave interferometers in frequency range around 1 Hz it is necessary to decrease seismic and Newtonian noise affecting detector performance. This goal achieved by installing experimental apparatus an appropriate underground site, where Rayleigh surface microseismic motion should be attenuated. Here we report results campaign devoted a long term characterization one potential sites for construction third detector: former mine Sos...
Abstract The recent discovery of gravitational waves (GWs) and their potential for cosmic observations prompted the design future third-generation GW interferometers, able to extend observation distance sources up frontier Universe. In particular, European detector Einstein Telescope (ET) has been proposed reach peak strain sensitivities about 3×10−25 Hz−1/2 in 100 Hz frequency region detection band down 1 Hz. bandwidth [1,10] Hz, seismic ambient noise is expected represent major...
Abstract In this work we report the ongoing characterization of Sos Enattos former mine (Sardinia, Italy), one two candidate sites for Einstein Telescope (ET), European third-generation underground interferometric detector Gravitational Waves. The site lies on a crystalline basement, made rocks with good geomechanical properties, characterized by negligible groundwater. addition, has very low seismic background noise due to absence active tectonics involving Sardinia. Finally, area...
An array of seismometers is being developed at the Sanford Underground Laboratory, former Homestake mine, in South Dakota to study properties underground seismic fields and Newtonian noise, investigate possible advantages constructing a third-generation gravitational-wave detector underground. Seismic data were analyzed characterize noise disturbances. External databases used identify sources waves: ocean-wave oceanic microseisms surface wind-speed correlations with motion as function depth....
Abstract The Einstein Telescope (ET) is a proposed third-generation gravitational-wave (GW) underground observatory. It will have greatly increased sensitivity compared to current GW detectors, and it designed extend the observation band down few Hz. At these frequencies, major limitation of ET predicted be due gravitational fluctuations produced by environment, most importantly seismic field, which give rise so-called Newtonian noise (NN). Accurate models NN are crucial assess compatibility...
Due to its unique geophysical features and the low density population of area, Sos Enattos is a promising candidate site host Einstein Telescope (ET), third-generation Gravitational Wave Observatory. The characterization former mine, close one proposed ET corners, started in 2010 with deployment seismic environmental sensors underground. Since 2019 new extensive array seismometers, magnetometers acoustic have been installed three stations along underground tunnels, additional station at...
We present the status of art Archimedes experiment, devoted to measuring debated interaction quantum vacuum fluctuations and gravity. The method is essentially weighing transition energy a layered superconductor where contribution expected be relevant. obtained by modulating temperature superconducting sample at frequency about 10 mHz change weight measured with suitably designed high sensitivity cryogenic beam balance. In this paper, we an overview discussing signal measured, presenting in...
The Einstein Telescope (ET) is a proposed next-generation, underground gravitational-wave detector to be based in Europe. It will provide about an order of magnitude sensitivity increase with respect the currently operating detectors and, also extend observation band targeting frequencies as low 3 Hz. One first decisions that needs made future ET site following in-depth characterization. Site evaluation and selection complicated process, which takes into account science, financial,...
SUMMARY Einstein Telescope (ET) is a proposed underground infrastructure in Europe to host future generations of gravitational-wave (GW) detectors. One its design goals extend the observation band terrestrial GW detectors from currently about 20 Hz down 3 Hz. The coupling detector environment becomes stronger at lower frequencies, which makes it important carefully analyse environmental disturbances ET candidate sites. Seismic pose greatest challenge since there are several mechanisms for...
Abstract The area surrounding the dismissed mine of Sos Enattos (Sardinia, Italy) is Italian candidate site for hosting Einstein Telescope (ET), third-generation gravitational wave (GW) observatory. One goals ET to extend sensitivity down frequencies well below those currently achieved by GW detectors, i.e. 2 Hz. In bandwidth [1,10] Hz, seismic noise anthropogenic origin expected represent major perturbation operation infrastructure, and that will host future detector must fulfill stringent...
Abstract We describe the behavior of a beam balance used for measurement small forces, in macroscopic samples, tens mHz frequency band. The balance, which works at room temperature, is prototype cryogenic Archimedes experiment, aimed measuring interaction between electromagnetic vacuum fluctuations and gravitational field. described has 50-cm aluminum arm suspends an sample 0.2 Kg lead counterweight. read-out interferometric, closed loop. It installed low seismic noise laboratory SAR-GRAV...
The development and integration of new detector payloads has been an important part the Advanced Virgo (AdV) project, major upgrade interferometric Gravitational Waves, aiming to increase sensitivity by one order magnitude. During phase AdV with monolithic suspension mirrors we experienced systematic failures later identified as caused dust contamination vacuum system. In not postpone commissioning, making possible join LIGO O2 observation run, Collaboration decided proceed relying on steel...
Abstract We report the tilt sensitivity reached by ARCHIMEDES tiltmeter in 2–20 Hz frequency region, where seismic noise is expected to give an important limitation next future Gravitational Waves detection, particularly through Newtonian noise. The level $$\tilde{\theta }(f)$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mover> <mml:mi>θ</mml:mi> <mml:mo>~</mml:mo> </mml:mover> <mml:mo>(</mml:mo> <mml:mi>f</mml:mi> <mml:mo>)</mml:mo> </mml:mrow> </mml:math>...
Abstract Third-generation gravitational wave observatories will extend the lower frequency limit of observation band toward 2 Hz, where new sources waves, in particular intermediate-mass black holes (IMBH), be detected. In this region, seismic noise play an important role, mainly through so-called Newtonian noise, i.e., gravity-mediated coupling between ground motion and test mass displacements. The signal lifetime such detector is order tens seconds. to determine whether a candidate site...
The Japanese gravitational wave observatory KAGRA will be operated at cryogenic temperatures to reduce thermal noise. Four main mirrors and their suspension systems, called payloads, cooled in the cryostat. Vibrations of cryostat cryocooler can contaminate output detector. One noise paths is heat link made from pure soft metal between payload cryocoolers cool payload. In order evaluate this amplitude, we measured vibration radiation shield production site Yokohama, Japan. For measurement,...
A viable technique for the preparation of highly thermal conductive joints between sapphire components in gravitational wave detectors is presented. The mechanical loss such a joint was determined to be as low 2 × 10−3 at 20 K and 10−2 300 K. noise performance typical compared requirements Japanese detector, KAGRA. It shown that using an indium suspension system allows it operate with noise. Additionally, results on maximum amount heat which can extracted via are found parts, joined by means...
Abstract In this paper we study the Casimir energy of a sample made by N cavities, with $$N\gg 1$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>N</mml:mi> <mml:mo>≫</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:math> , across transition from metallic to superconducting phase constituting plates. After having characterised for configuration in which layers cavities are dielectric and plasma sheets, concentrate our analysis on latter. It represents final step...
The design of third-generation gravitational-wave detectors requires dedicated sensors to perform very accurate measurements the residual motion mechanical components cooled down at cryogenic temperatures and accommodated close test masses. For this reason, we developed a vertical accelerometer prototype derived by classical scheme widely used in Virgo seismic suspension control. Thermal contractions are main concern when cooling such device calibration check low temperature, absence...
Abstract In this work we study the thermal noise of two monolithically suspended mirrors in a tabletop high-finesse optical cavity. We show that, given suitable seismic filters, such cavity can be designed to sensitive quantum radiation pressure fluctuations audio band gravitational wave interferometric detectors below 1 kHz. Indeed, suspensions and coatings constitutes main limit observation fluctuations. This overcome with an adequate choice mirror suspension coating parameters. Finally,...