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Sandro Kรถrschner (TU Bergakademie Freiberg)27/05/2025, 16:00Poster
A new large-scale research center is established in Lusatia, the German Centre for Astrophysics (DZA). One part of this will be the Low Seismic Lab (LSL), which is to be built in the Lusatian granodiorite in the region between the eastern German cities Hoyerswerda, Kamenz and Bautzen. This underground laboratory is a place of seismic tranquility, which is required for the trouble-free...
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John Oh27/05/2025, 16:00Active Noise MitigationPoster
The sensitivity of gravitational wave detectors, such as those used in the Laser Interferometer Gravitational-Wave Observatory (LIGO), is significantly affected by various noise sources, many of which are nonlinear and non-stationary. To effectively characterize and mitigate these noise artifacts, we propose a novel methodology that combines Empirical Mode Decomposition (EMD) and the Maximal...
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Mohamed Elbashbishy27/05/2025, 16:00Vacuum and CryogenicsPoster
The Research Center Jรผlich is part of a collaboration with the RWTH Aachen in developing dedicated items of the UHV system for the ET. One importing item is the protection of the detectors at the three key points of the triangular system. Therefore, a fast-closing shutter system should be developed. The investigations will comprise both numerical simulations, development of a technical system...
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Luca Negri27/05/2025, 16:00Poster
Gravitational-wave (GW) astronomy has become routine with almost 200 GW detections in the ongoing observing run of the current network of ground-based detectors. With the next generation of GW detectors with higher sensitivities being planned, the volume and the complexity of the detected signals are expected to rise dramatically, increasing the computational cost and resources of running...
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Jan Kelleter (RWTH Aachen University)27/05/2025, 16:00Active Noise MitigationPoster
The Einstein Telescope aims to improve sensitivity by at least an order of magnitude compared to current detectors. The dominant noise source in the region of 1 to 10 Hz is expected to be Newtonian Noise (NN) from seismic activity in the surrounding rock. In order to reach the desired sensitivity, NN must be actively mitigated. Seismometers will be installed in boreholes around the mirrors to...
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Niklas Nippe, Tom Niggemann27/05/2025, 16:00Poster
Characterizing the seismic impact of nearby wind turbines is crucial for future gravitational wave detectors like the Einstein Telescope.
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Their vibrations pose a challenge to gravitational wave detection especially in the low frequency range where direct and gravitational couplings are the limiting factors.
This poster will explore and discuss the influence of different wind turbine tower... -
Matteo Montani27/05/2025, 16:00SuspensionsPoster
The next generation of ground-based gravitational wave detectors will push the boundaries of our understanding of the Universe. The Einstein Telescope aims to surpass current observatories by achieving unprecedented sensitivity, particularly at low frequencies. This improvement relies on advanced seismic attenuation systems, crucial for reducing environmental noise and enhancing detection...
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97. Optimizing Hartmann Wavefront Sensor performances for direct measurement of optical aberrations.Matteo Ianni (INFN, Section of Rome Tor Vergata, Rome, Italy. University of Rome Tor Vergata, Department of Physics, Rome, Italy)27/05/2025, 16:00OpticsPoster
Increasing the sensitivity of gravitational wave detectors is a highly complex challenge which requires their stable operation at progressively higher power levels. Optical power absorption in the Fabry-Perot cavities leads to thermally induced aberrations that, if not compensated, degrade the interferometer's performance. Therefore, the measurement and correction of these optical aberrations...
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Diana Lumaca (INFN Sezione di Roma Tor Vergata)27/05/2025, 16:00OpticsPoster
Future high-power operation of Einstein Telescope (ET) in its high-frequency dedicated incarnation (ET-HF), is expected to amplify the impact of thermally-induced optical aberrations, posing new challenges for beam quality and interferometric stability. Building on the legacy of thermal compensation systems developed for Advanced Virgo, we are currently investigating advanced wavefront sensing...
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Marcello Giroletti (INAF Istituto di Radioastronomia, Bologna (Italy))27/05/2025, 16:00Div4Poster
The detection of information carried by means other than electromagnetic waves has opened a new era in the study of the Universe. Very Long Baseline Interferometry, thanks to its exquisite angular resolution, remains the only technique allowing astronomers to directly image the most compact structures associated with the emission of energetic photons or other carriers of information, as well...
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Andrea Lampis27/05/2025, 16:00InterferometerPoster
The ET Infrastructure for Optics and Electronics in Cagliari (ETICO2) is a part of the ETIC project aiming at establishing a set of state-of the art laboratories dedicated to optoelectronics and coatings for ET. The facility has been recently established at the Department of Physics of the University of Cagliari as result of a collaboration between INFN and Cagliari University.
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The new R&D... -
Oscar Reina (Barcelona Supercomputing Center), Nadia Tonello (Barcelona Supercomputing Center)27/05/2025, 16:00Poster
The third generation Gravitational Wave detectors such as the Einstein Telescope, and the future instruments for astronomy and astrophysics to be released in the next years will generate an increased amount of data of considerable complexity, that will be available to the astrophysics community. This poses important challenges in order to store, process, integrate, distribute, share and...
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Gregoire Lacaille (University of Glasgow)27/05/2025, 16:00SuspensionsPoster
We present updates on the modelling work happening in Glasgow towards the design of prototypes for the next generation of suspensions. The previous models of advanced LIGO are reviewed, and the effect of deviations from ideal scenarii on the suspension thermal noise are studied. As we make progress towards the definition of parameters for our cryogenic suspension, bond strength trials and...
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Fabiรกn Peรฑa Arellano27/05/2025, 16:00Poster
This presentation provides an update on the feasibility analysis of a novel suspension for the cryogenic test-mass mirrors of the low-frequency detector of the Einstein Telescope. To overcome the severe limitation imposed on traditional suspensions by the tensile stress for simultaneously achieving low thermal noise, safer mechanical margins and high thermal conductance, this configuration...
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Valerio Scacco (Dipartimento di Fisica, Universitร degli Studi di Roma Tor Vergata; INFN sez. Roma Tor Vergata)27/05/2025, 16:20OpticsPoster
The next-generation gravitational wave observatory, Einstein Telescope, requires coatings with extremely low losses to enhance its sensitivity. Our research focuses on the development and characterization of oxide and nitride coatings deposited using sputtering techniques. We investigate how impurities and stoichiometry influence their properties.
To this end, we have established new...
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Ms Sara Al-Kershi (Max-Planck Institute for Gravitational Physics)27/05/2025, 16:20Active Noise MitigationPoster
As gravitational wave detectors continue to advance, enhancing their sensitivity remains a crucial challenge. Performance is limited by various noise sources, including seismic, thermal, and quantum noise. Developing techniques to mitigate these limitations is essential for the development of the Einstein Telescope interferometers.
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The AEI 10m Prototype is a prototyping facility closely... -
Francesca Badaracco (Unige)27/05/2025, 16:20OtherPoster
The Einstein Telescope (ET) and Cosmic Explorer (CE), as next-generation gravitational-wave (GW) observatories, will achieve unprecedented sensitivity, detecting an immense number of GW signals across an extended frequency range. This improvement introduces a fundamental challenge: the presence of overlapping GW events in both time and frequency, complicating signal extraction and parameter...
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Angรฉlique Lartaux (IJCLab)27/05/2025, 16:20OpticsPoster
CALVA is an experimental facility at IJCLab (Orsay, France), hosting a 50-m long suspended optical cavity. It is mainly dedicated to quantum noise reduction experiments with the development of an in-vacuum squeezing source and a linear three-mirror cavity as squeezing filter cavity. In this poster I will present the infrastructure, the on-going experiments and the projects foreseen for...
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Hanna Strozyk (University of Warsaw)27/05/2025, 16:20Div10Poster
We investigate the detectability of continuous gravitational waves (CW) - weak, long-duration signals emitted by asymmetric, rotating neutron stars (NS). Despite current gravitational wave detectors not yet providing a confident detection, future instruments, notably the Einstein Telescope (ET), could move CW signals from theory to observation. Our analysis estimates the number of isolated...
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Matteo Schulz (Gran Sasso Science Institute)27/05/2025, 16:20Div5Poster
We explore the potential of cross-correlation between gravitational waves (GWs) and 21 cm intensity mapping (IM) from neutral hydrogen emission (HI), focusing on its role in view of future high-precision observatories, specifically Einstein Telescope (ET) and the Square Kilometer Array Observatory (SKAO). We model the large scale structure evolution by making use of 3D lightcones of the dark...
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Andrea Begnoni27/05/2025, 16:20Div9Poster
Future detectors of gravitational waves will be able to detect tens of thousands of compact binary coalescences every year. It is then important to have a quick and reliable way of performing the parameter estimation of these sources and the most common tool used in the literature for this purpose is the Fisher matrix. During this talk, I will present the open source code GWJulia, which...
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Aaron Goodwin-Jones (UCLouvain)27/05/2025, 16:20InterferometerPoster
LIGO and Virgo are limited in the amount of power they can build up in the arms. The limitation arises from the absorption of optical power in the main optics, causing mirror surface deformations. This in turns couples scatters light into higher order modes and causes several problems, notably, parametric instabilities, degraded buildup of the control sidebands and limited squeezing...
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Mrs Paola Reggio (CRESME Ricerche)27/05/2025, 16:20Poster
One of the key requirements for achieving the expected sensitivity in detecting weak gravitational waves is to secure an area free from both natural and anthropogenic noise. For this reason, the proposed Italian site for the Einstein Telescope is located adjacent to the former Sos Enattos metalliferous mine in northeastern Sardinia (Province of Nuoro). Sardiniaโs unique tectonic settingโas a...
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Dr Federico Armato (UNIGE - INFN Genova)27/05/2025, 16:20Active Noise MitigationPoster
At low frequencies (1-100 Hz), the dominant noise sources for the Einstein Telescope (ET) will be of seismic and magnetic origin. In particular, magnetic noise can be categorized into natural noise, primarily caused by Schumann resonances, and self-inflicted noise, generated by the interferometerโs own electronics.
Based on experience from Virgo, achieving the target sensitivity will...
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Alessandro Pesci (INFN Bologna)27/05/2025, 16:20Div1Poster
Many pieces of evidence point to existence,
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at least at en effective level,
of a lower limiting length of quantum origin.
A mathematical tool is here presented which accomplishes the task
of endowing spacetime with a description of distances
with a minimum length incorporated, meaning that distances between
any two space or time separated points tend to a finite limit
when the points go... -
Alessandro Alberto Trani27/05/2025, 16:20Div3Poster
Black hole binary mergers in dense stellar environments (such as globular clusters or galactic nuclei) are expected to retain non-negligible orbital eccentricity up to the point of gravitational-wave emission. Detecting residual eccentricity at merger would provide a clear signature of dynamical formation channels. Previous studies have suggested that a few percent of stellar-born binary black...
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Monica Marzario (Sapienza, University of Rome)27/05/2025, 16:20OtherPoster
The Code of Conduct defines the expected behaviour within the ET Collaboration and serves as the foundation for maintaining a professional, ethical, and respectful research environment.
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As an international collaboration that brings together diverse cultural backgrounds and work styles, ET values inclusivity and cooperation. Scientific achievements are meaningful not only for their impact but... -
Tobias Reike27/05/2025, 16:20Poster
To estimate the source parameters of a gravitational wave signal from measured strain data, two primary methods are used: Bayesian Inference and Deep Learning. Bayesian Inference provides reliable results but demands significantly more computational resources compared to Deep Learning methods. Thanks to their efficiency, normalizing flows have gained popularity in recent years and are expected...
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Alessandro Parisi (Universitร di Perugia)27/05/2025, 16:40Active Noise MitigationPoster
This study aims to characterize the seismic noise at the CAOS construction site to support the development and testing of suspension systems for gravitational wave interferometers, such as the Einstein Telescope.
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Dr Thorben Schmirander (University of Hamburg, Institute of Experimental Physics)27/05/2025, 16:40Poster
This contribution addresses a first feasibility study for the measurement of millihertz Gravitational waves (mHz GWs) with a storage ring-based detector design that might aid in noise mitigation for Einstein Telescope (ET) by providing a terrestrial gravity noise (TGN) signal and could potentially enable multiband GW observations from Earth.
We propose an experiment based on the measurement...
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Timo Weckerle27/05/2025, 16:40Vacuum and CryogenicsPoster
The ERC project GRAVITHELIUM investigates full-scale cryogenic mirror suspensions for ET-LF, including a novel concept using static superfluid helium (He-II) inside a titanium marionette suspension tube. To investigate the possible dissipative contribution of the superfluid to the quality factor of the suspension, a low-noise lab-scale He-II supply unit, capable of delivering 400 mW of cooling...
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Jurriaan Langendorff27/05/2025, 16:40SuspensionsPoster
Current state-of-the-art gravitational wave observatories around the world, LIGO, Virgo, and KAGRA, have enabled the detection of $90$ gravitational waves, with an additional $200$ events in the ongoing O4 observing run[ [ref]][1]. This is achieved through strain sensitivities in the order from $10^{-18} 1/\sqrt{Hz}$ to $10^{-23} 1/\sqrt{Hz}$[ [ref][2],[ref]][3], where current noise...
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Andrea Svizzeretto (University of Perugia and INFN Perugia)27/05/2025, 16:40OtherPoster
The work explores the application of Deep Reinforcement Learning (DRL) to optimize the locking procedure of high-finesse Fabry-Perot (FP) cavities, critical components in Gravitational Wave (GW) detectors. Improving and speeding up the locking procedure for a correct resonance acquisition of these cavities aim to improve the detectorโs duty cycle, enhancing the Science Mode time (Accadia et...
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Sacha Peters (Universitรฉ de Liรจge), Soumen Koley (Universitรฉ de Liรจge)27/05/2025, 16:40Active Noise MitigationPoster
Newtonian noise (NN), arising from local density fluctuations due to seismic activities will limit the sensitivity of next-generation gravitational wave detectors at low frequencies. This study explores deep learning models as non-linear algorithms to predict and cancel NN.
As a preliminary experiment prior to obtaining Einstein Telescope data, we utilise data from the Virgo detector,...
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Matteo Scialpi (INFN - University of Ferrara)27/05/2025, 16:40Div7Poster
In this talk we will present a physics-informed autoencoder designed to encode the equation of state of neutron stars into an interpretable latent space. The input polytropic EoS is encoded in the mass, radius, and tidal deformability values of a neutron star. Unlike traditional black-box autoencoders, our approach incorporates additional loss functions to enforce explainability in the encoded...
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Giuseppe Greco27/05/2025, 16:40Poster
The GWmaps webpage (https://virgo.pg.infn.it/maps/) provides an interactive platform for visualizing gravitational-wave sky localizations from the LIGO, Virgo, and KAGRA Collaborations (LVK). This application adheres to the technical standards recommended by the International Virtual Observatory Alliance (IVOA). In this poster, we present GWmaps, highlighting its advanced graphical...
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Matteo Ferro (INAF-OAB)27/05/2025, 16:40Div4Poster
Short gamma-ray bursts (SGRBs) represent a unique class of cosmic events offering valuable insights into the physics of compact object binary systems. From the combined detection of the gravitational wave (GW) event GW170817 with the corresponding electromagnetic counterparts - the kilonova AT2017gfo and the short GRB170817A - interest in compact object binary merger counterparts has...
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Nico Wagner27/05/2025, 16:40OpticsPoster
Crystalline AlGaAs/GaAs coatings are a promising low-noise material candidate for high-precision optical metrology due to their low mechanical loss. However, recent studies have revealed excess Brownian thermal noise in optical cavities, which appears to be linked to photoinduced effects. Additionally, there are indications that illumination influences the mechanical loss in GaAs, leading to...
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Mr Shi Yao (Geophysical Institute, Karlsruhe Institute of Technology, Germany;State Key Laboratory of Deep Petroleum Intelligent Exploration and Development, Institute of Geology and Geophysics, Chinese Academy of Sciences, China;University of Chinese Academy of Sciences, China)27/05/2025, 16:40Poster
Understanding the ambient seismic noise field and its attenuation with depth is an important consideration for the decision to build the Einstein Telescope at a proposed site. Here, we perform 2D and 3D ambient noise simulations for the Lausitz region by solving the seismic wave equation using Spectral Element Method (SEM), a high-fidelity numerical technique capable of handling complex...
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Dr Fernando Linsalata (INGV - Roma)27/05/2025, 16:40Poster
The aim of this work is obtaining a preliminary estimate of expected crustal deformation in Sardinia due to geodynamical processes acting on local and regional scales in response to the past and present variations of surface loads. Solving the โSea Level Equationโ for a spherically symmetric, self-gravitating visco-elastic Earth, we characterize the ongoing vertical and horizontal movements in...
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108. The PIP, a novel seismic isolation filter for third-generation gravitational wave observatoriesMichele Vacatello (University of Pisa, INFN Pisa)27/05/2025, 16:40SuspensionsPoster
The low-frequency frontier is amidst the most important challenges for future gravitational waves detectors. Improved low-frequency sensitivity is crucial for detecting high-mass or high-z systems, improving source localisation, enabling timely alerts for electromagnetic follow-ups, and facilitating the detection of predicted gravitational waves from sources like rotating pulsars. In this...
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Patrick Schillings (RWTH Aachen University)27/05/2025, 16:40Active Noise MitigationPoster
At the Einstein Telescope, Newtonian noise is expected to be the dominant noise for low frequencies. Its impact is proposed to be reduced with the help of an array of seismometers that will be placed around the interferometer endpoints. As boreholes for seismometers are expensive, their positions should be optimized. Up to now this was done based on an analytical calculation that makes...
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simone Lombardi (INAF Padova)27/05/2025, 17:00OpticsPoster
In gravitational interferometry increasing the measuring laser power is a straightforward way to improve the instrument sensitivity, and it has been one of the main points in the upgrades of the existing detector like VIRGO and in the design of future projects like ET. However, the dissipated portion of the high circulating power in Fabry-Pรฉrot arm cavities is enough to heat up and deform the...
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Piero Chessa (Universitร degli studi di Perugia / INFN-Perugia)27/05/2025, 17:00SuspensionsPoster
The CAOS research center (Centro per Applicazioni sulle Onde gravitazionali e la Sismologia) is under construction in Perugia to test seismic attenuation systems for ET and Virgo and perform seismological research. Two 13 m tall attenuators are currently being designed and manufactured, based on the Advanced Virgo Superattenuator concept to support a suspended Fabry-Pรฉrot cavity with 100 kg...
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Hanna Skliarova (UNIPD)27/05/2025, 17:00OpticsPoster
The COMET (Coating Materials for Einstein Telescope) laboratory of the University of Padua is growing in Rovigo within the ETIC project. This laboratory will be able to produce samples on demand for the international scientific community, fostering the development of new materials and treatments that can, in the future, be reproduced on a large scale to realize the mirrors of ET and other...
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Luciano Antonio Corubolo (Universitร degli studi di Roma Tor Vergata; INFN Roma Tor Vergata)27/05/2025, 17:00OpticsPoster
In the context of gravitational wave detectors, optical aberrations primarily arise from laser absorption in coatings and production process defects in the various optics along the laser path. If uncorrected, these distortions can significantly deviate the detector from its optimal working point, making the interferometer unmanageable and drastically reducing its sensitivity. Therefore, the...
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Francesca Spada, Dr Giovanni Losurdo (INFN Pisa), Dr Leonardo Lucchesi (INFN Pisa), Lucia Trozzo (INFN, sez. Napoli), Manuel Pinto, Paolo Ruggi27/05/2025, 17:00SuspensionsPoster
The Superattenuator is a cornerstone in seismic isolation systems for ground-based interferometers and is indicated as the reference solution for the isolation of the test masses of the Low-Frequency Einstein Telescope.
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However, the need for an update of the Superattenuator arises not as much from the increased sensitivity requirements, as from the need to suspend a heavier, cryogenic... -
Hemendra Singh27/05/2025, 17:00SuspensionsPoster
The E-TEST prototype, developed for the Einstein Telescopeโa next-generation gravitational-wave observatory, utilises a 100-kg test mass cooled to 20โ25 K using radiative cooling techniques. This system achieves effective seismic isolation below 10 Hz while minimising thermal noise, a key challenge for high-precision measurements. Active isolation successfully mitigates low-frequency seismic...
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Fabrizio Pusceddu (Universitร di Cagliari - Dipartimento di Ingegneria Civile, Ambientale e Architettura), Marco Moro (Universitร degli Studi di Cagliari - DICAAR), Massimo Faiferri (Universitร di Cagliari), Silvia Mocci (Universitร degli Studi di Cagliari), Stefano Cadoni (Universitร degli Studi di Cagliari DICAAR), Stefano Mais (DICAAR, Universitร degli Studi di Cagliari)27/05/2025, 17:00InfrastructuresPoster
The Laboratory of Architecture and Territory, whose members are all architects and researchers from the Department of Civil, Environmental Engineering and Architecture (DICAAR) of the University of Cagliari, Italy, explore the potential of designing research infrastructures and their spatial components by considering territorial systems. in recovering the material and immaterial value of a...
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Barbara Garaventa, Dr Federico Armato (UNIGE - INFN Genova)27/05/2025, 17:00Active Noise MitigationPoster
The Italian Einstein Telescope Infrastructure Consortium (ETIC) is an initiative led by INFN aimed at establishing a network of laboratories crucial for the future Einstein Telescope gravitational wave interferometer, alongside characterization efforts for the Sos-Enattos site in Sardinia, Italy. This poster will present the GALILEO project for the Einstein Telescope, planned to be set up at...
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Ms Charlotte Benning (RWTH Aachen University)27/05/2025, 17:00InfrastructuresPoster
The Einstein Telescope will consist of 120 km of vacuum pipes with a diameter of 1 m to achieve the required design sensitivity. The BeamPipes4ET project introduces an innovative production concept for these vacuum pipes by manufacturing them on-site in the tunnels through a continuous process using coils of sheet metal. This minimizes the transportation needs - forming the key concept of...
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Enes Turkic (Karlsruhe Institute of Technology)27/05/2025, 17:00Vacuum and CryogenicsPoster
The ERC project GRAVITHELIUM aims to investigate the dissipative behaviour of full-scale suspensions used to cool-down the cryogenic core optics in ET-LF. Two possible suspension concepts are currently considered, using either monocrystalline suspension fibres made of silicon or sapphire, or titanium suspension tubes filled with static He-II. The dissipative behaviour of these suspensions is...
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Federico Marinacci (University of Bologna), Prof. Marco Baldi (University of Bologna)27/05/2025, 17:00Div3Poster
We present a new method for incorporating gravitational wave (GW) sources into cosmological simulations of galaxy formation. Our approach, implemented in the moving-mesh code Arepo, associates the properties of merging binary systems โ black hole-black hole, black hole-neutron star, and neutron star-neutron star โ with star particles representing a single stellar population (SSP) in...
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Maria Antonietta Palaia (Universitร di Pisa and INFN-Pisa)27/05/2025, 17:00SuspensionsPoster
Gravitational waves (GWs) detectors have been upgraded over time to enhance their sensitivity, pushing the limits imposed by their infrastructure.
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Next generation observatories, Einstein Telescope and Cosmic Explorer, are currently under design, aiming for significant improvement in sensitivity that can have significant implications in scientific research. Among them, the possibility of... -
Ivan Di Antonio (INAF - Osservatorio Astronomico d'Abruzzo)27/05/2025, 17:00OpticsPoster
Thermal gradients in the Input Test Masses (ITM) introduce optical aberrations that pose a critical challenge for both current and next-generation gravitational wave (GW) interferometers, significantly affecting their stability and sensitivity. Using the temperature map obtained through finite element analyses, the optical path difference (OPD) caused by thermal lensing and the deformation of...
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Andreas Mathwieser (Fraunhofer IPT)27/05/2025, 17:00OpticsPoster
In ET-HF it is expected that there will be optical aberrations due to thermal deformation of test masses. The aberrations will influence the sensitivity but less is known about the expected aberration order of magnitude or shape. In our study, we tackle the optical measurement of the aberration by simulating the optical read-out via a Hartmann wavefront sensor. We study the sensor components...
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Johannes Bรคuerlein (Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Institute for Gravitational Physics of the Leibniz Universitรคt Hannover)27/05/2025, 17:20SuspensionsPoster
The Einstein Telescope, as a third-generation gravitational wave detector, aims to improve the sensitivity of the detection band in the low-frequency region over existing gravitational wave detectors. For this, displacement sensors that provide high sensitivity between 100 mHz and 200 Hz are required for seismic isolation, and the scientific community is striving to increase their sensitivity...
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Prof. Riccardo Sturani27/05/2025, 17:20Div2Poster
Observations of gravitational waves (GWs) from dark sirens measures source locations and distances, whereas galaxies have precise angular positions but no direct measurement of their distances -- only redshifts. By cross-correlating GWs from binary black hole mergers, in spherical shells of luminosity distance DL, with galaxies in shells of redshift z, we project a direct measurement of the...
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Dr Adrian Schwenck27/05/2025, 17:20Vacuum and CryogenicsPoster
In-situ monitoring and a good understanding of adsorption and desorption processes on cryogenic mirror surfaces are essential for the LF interferometers of ET and for ET-Pathfinder. A working group with members from UM, TNO and KIT work on a test setup focusing on two technologies for the monitoring of the growth of monolayers on cold surfaces, ellipsometry and microbalances. This poster...
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Paolo Prosperi (INFN Sezione di Pisa)27/05/2025, 17:20SuspensionsPoster
The pursuit of next-generation gravitational-wave detectors, such as the Einstein Telescope, with its ambitious goals for sensitivity, places extreme demands on the complex systems controlling the position of suspended mirrors. Operating in underground environments with exceptionally low seismic noise and targeting an extended bandwidth from low to high frequencies, these systems require...
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Francesco Crescimbeni27/05/2025, 17:20Div3Poster
The detection of a subsolar object in a compact binary merger is regarded as one of the smoking gun signatures of a population of primordial black holes (PBHs). We critically assess whether these systems could be distinguished from stellar binaries, for example composed of white dwarfs or neutron stars, which could also populate the subsolar mass range. At variance with PBHs, the...
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Ardiana Nela27/05/2025, 17:20SuspensionsPoster
With the plans for ET-LF to operate at cryogenic temperatures, there is a need for advanced, low-noise crystalline suspension systems to reach the required sensitivity goals. Crystalline silicon is a promising candidate for suspension elements due to its favourable properties at cryogenic temperatures, including a high quality factor, high thermal conductivity and advantageous thermoelastic...
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Francesco De Marco (La Sapienza University of Rome and INFN Roma1)27/05/2025, 17:20InterferometerPoster
The current measurement scheme for a broadband quantum noise reduction in GW detectors relies on 300 m long and detuned filter cavities, that has been stunningly proven in Advanced LIGO and successfully commissioned in Advanced Virgo, for the run O4.
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Nevertheless, they add infrastructural complexity and optical losses on top of an already large instrumental apparatus. Moreover, ET will need... -
Riccardo Brivio (INAF-OAB)27/05/2025, 17:20Div4Poster
In the context of Gamma-Ray Bursts (GRBs) astrophysics, the class of short GRBs is particularly fascinating since they are expected to be produced in compact binary mergers, and to be associated with gravitational wave (GW) events. Double neutron star or neutron star-black hole binaries likely generate another electromagnetic transient, known as Kilonova (KN). As such, with the present and...
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Alessandro Drago (University of Ferrara)27/05/2025, 17:20Div6Poster
We analyze GW190425 and GW170817 within a scenario in which strange quark stars (QSs) coexist with neutron stars. We will conclude that:
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- GW190425 could be a QS-QS merger, producing a supramassive QS;
- a QS-QS merger produces a weak KN signal (which could have passed undetected in the case of GW190425);
- the material ejected in the post-merger is mostly flowing in the equatorial plane,... -
Andrea Moscatello27/05/2025, 17:20OpticsPoster
High sensitivity optical measurements, such as those performed in interferometric Gravitational Waves detectors, are prone to stray light noise. Due to the high-quality optics used in the interferometers, light scattering may be dominated by the residual presence of particles. This can be an issue for the next generation detector Einstein Telescope as well as for the present LIGO and Virgo...
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Adriano Frattale Mascioli (Virgo)27/05/2025, 17:20Div9Poster
Gravitational-wave (GW) observations of compact binaries have the potential to unlock several remarkable applications in astrophysics, cosmology, and nuclear physics through accurate measurements of the source luminosity distance and inclination. However, these parameters are strongly correlated when performing parameter estimation, which may hamper the enormous potential of GW astronomy. We...
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Markus Bachlechner (RWTH Aachen University), Tim Kuhlbusch (RWTH Aachen University)27/05/2025, 17:20Active Noise MitigationPoster
Prediction and mitigation of noise can increase the sensitivity of future gravitational wave detectors like the Einstein Telescope. These mitigation techniques could reduce noise from sources that can be independently measured, like seismic, electromagnetic, or acoustic disturbances. Wiener filters are a common technique that has been tested in current detectors. We are exploring the potential...
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Dr Leonardo Lucchesi (INFN Pisa)27/05/2025, 17:20SuspensionsPoster
The CAOS (Centro per Applicazioni sulle Onde gravitazionali e la Sismologia) facility is currently under construction in Perugia, Italy. It will host a short Fabry-Perot cavity to carry out dedicated R&D on seismic attenuation systems for ET, specifically enabling the development of two AdV-like Superattenuators (SAs), a technology that represents the ET reference solution as envisaged in its...
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Francesco Flocco (INFN)27/05/2025, 17:20OpticsPoster
An ideal design of the Einstein Telescope would assume perfect coatings and alignment, and would foresee no polarization leakage. However, non-idealities, such as residual reflectivity of antireflection coatings or residual transmissivity of mirrors, a number of โghost beamsโ are generated. These are beams that should nominally not exist, serve no purpose and are not directly handled and...
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Marco Toffano (INFN Padova)27/05/2025, 17:40Active Noise MitigationPoster
In the current Virgo setup, quantum noise reduction is achieved by injecting squeezed vacuum states in the interferometer dark port. For their generation and phase stabilization with respect to the interferometer carrier, low-noise phase locked loops (PLL) and direct digital synthesizers (DDS) are used. An RF-mixer based architecture is under investigation for the development of an...
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Dr Andrea Pavan (INAF-Osservatorio Astronomico di Padova)27/05/2025, 17:40Div4Poster
The advent of the Einstein Telescope (ET) will revolutionize our understanding of binary neutron star (BNS) mergers, with a huge number of gravitational wave (GW) detections expected every year, spanning about 10 billion years of cosmic history. As demonstrated by the GW170817 event, the greatest scientific potential is held by multi-messenger observations combining the GW signal with the...
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Cristiano Ugolini (GSSI, SISSA)27/05/2025, 17:40Div3Poster
The first direct detection of gravitational waves (GWs), back in 2015, marked the beginning of a new era for the study of compact objects, and the upcoming next-generation detectors, such as Einstein Telescope (ET), are expected to add hundreds of thousands of compact binary coalescences to the list. We discovered up to 90 GW signals, from which we were able to put some constrains on the...
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Mr Giovanni Antinozzi (SISSA - Scuola Internazionale Superiore di Studi Avanzati)27/05/2025, 17:40Div2Poster
The present generation of interferometers has demonstrated that gravitational-wave observations, even in the absence of electromagnetic counterparts, i.e. dark sirens, can serve as an independent method to investigate the Hubble tension. However, while the proposed designs for the Einstein Telescope (ET) can produce astonishingly precise $H_0$ measurements, it has been shown that incorrect...
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Mr Shreevathsa Chalathadka Subrahmanya (University of Hamburg)27/05/2025, 17:40Active Noise MitigationPoster
Precise displacement sensing with femtometer or sub-femtometer readout noise at frequencies below $10\,\mathrm{Hz}$ is extremely beneficial for the ET active isolation systems. Here, we present a laser interferometric sensor, named heterodyne cavity-tracking, designed for high-precision relative displacement readout. The scheme utilizes a heterodyne-stabilized optical cavity, incorporating the...
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Nicola Borghi27/05/2025, 17:40Div2Poster
Galaxy catalogs can be combined with gravitational wave observations to provide cosmological constraints through the dark siren method. However, host galaxies may be missed in the catalogs due to observational effects, potentially weakening the constraints and introducing systematics. At the same time, galaxy catalogs can include galaxy properties - such as the stellar mass - that can be...
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Demetrio Magrin (INAF - Osservatorio Astronomico di Padova)27/05/2025, 17:40OtherPoster
MezzoCielo, meaning "half of the sky," represents one of the most advanced developments in the class of all-sky survey telescopes. This revolutionary design is built around a fully spherical refractive optical element, filled with a highly transparent, low-refractive-index liquid, and surrounded by a large array of identical cameras. By leveraging this unique optical architecture, MezzoCielo...
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Maria Lisa Brozzetti (Universitร degli Studi di Perugia - Ligo-Virgo-Kagra and ET Collaboration)27/05/2025, 17:40Poster
UpGLADE is an upcoming extensive galaxy catalogue which will include more than a billion objects from various non-independent surveys, providing redshift information, which is fundamental for gravitational-wave (GW) cosmology โ particularly for Hubble constant inference using dark sirens and galaxy catalogue. Moreover, UpGLADE will play a crucial role in multi-messenger astronomy by supporting...
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Dr Marco Angelucci (INFN - LNF)27/05/2025, 17:40Vacuum and CryogenicsPoster
Electrostatic charging on the surfaces of the optical elements is a limiting noise source for gravitational wave detectors (GWD) already at room temperature. The charge accumulation has been already observed in LIGO and possibly in Virgo.
The electrostatic charging mechanism of the mirrors may be mainly caused by local electrostatic (LIGO) or electro-magnetic (Virgo) controls.
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Dr Matteo Pais (INAF - Osservatorio astronomico di Padova (OAPD))27/05/2025, 17:40Div4Poster
The gravitational waves from the binary neutron star merger GW170817 were accompanied by a multiwavelength electromagnetic counterpart, which confirms the association of the merger with a short gamma-ray burst (sGRB). The afterglow observations implied that the event was accompanied by a narrow, ~5ยฐ, and powerful, ~1e50 erg, jet. We study the propagation of a Poynting flux-dominated jet within...
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Matteo Tagliazucchi27/05/2025, 17:40Div2Poster
Gravitational waves (GWs) from merging compact binaries have opened a new window into cosmology and fundamental physics, allowing precise tests of General Relativity (GR) and measurements of cosmic expansion. However, with the advent of future GW observatories, it is necessary to develop efficient and robust tools capable of handling the growing volume of data. In this talk, we present CHIMERA...
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Jessica SteinlechnerOtherPoster
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