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11/11/2025, 09:00
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Marin Karuza11/11/2025, 09:20
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Eugenio Coccia11/11/2025, 09:30
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Harald Lueck, Michele Punturo (INFN)11/11/2025, 09:50
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Antonio Zoccoli (INFN), Jorgen D'Hondt, marco pallavicini11/11/2025, 10:10
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Jan Harms, Stefan Hild11/11/2025, 11:00
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Michele Punturo (INFN)11/11/2025, 11:20
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Martin Hendry (University of Glasgow)11/11/2025, 11:50talk
In this talk I will provide a short update on work being carried out as part of the ET-PP project to develop plans for an Einstein Telescope mentorship and training programme. I will first briefly summarise recent consultations with early-career colleagues on the scope of a possible ET mentoring programme, before switching focus to the question of what a collaboration-wide, coordinated...
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11/11/2025, 12:00
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Paolo Pani, Rafael Porto (DESY)11/11/2025, 13:20
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Dr Wim Walk (Nikhef)11/11/2025, 13:20
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Gabriele Capoccia (INFN-PG)11/11/2025, 13:20
The CAOS international laboratory (Center for Gravitational Wave and Seismology Applications) of the University of Perugia, in collaboration with INFN and EGO and primarily funded by the ETIC (Einstein Telescope Infrastructure Consortium) project, is mainly designed to develop and test new technologies for the Einstein Telescope. The facility will focus on the development and fine-tuning of...
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Angelo Ricciardone, Riccardo Sturani11/11/2025, 13:30
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Gabriele Franciolini11/11/2025, 13:40
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Prof. Stefan Hild (Maastricht University and Nikhef)11/11/2025, 13:40
ETpathfinder is a R&D fieldlab aiming to provide a testbed for research, development, integration and validation of ET-LF technologies in an environment similar to ET. In particular the interferometer configuration featuring four cryogenic towers and two flexible bench towers (for input and output optics) allows for the construction of full Fabry-Perot Michelson interferometer, with a...
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Dr Hannes Claes et al. (KU Leuven)11/11/2025, 13:40
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Giancarlo Ghirlanda (Istituto Nazionale di Astrofisica - Osservatorio di Brera & INFN sezione di Milano Bicocca)11/11/2025, 13:50
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B.S. Sathyaprakash11/11/2025, 14:00
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Dr Giovanni Luca Cardello (Università degli Studi di Sassari)11/11/2025, 14:00
Recent deliverables from RockSoil S.p.A. have significantly advanced our geological and hydrogeological understanding of the Sos Enattos area, which is being considered as a potential location for the Einstein Telescope (ET). The dataset includes results from eleven deep boreholes, geophysical surveys (ERT and SRT) and magnetometry and radon gas measurements. These results have been integrated...
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Laura Silenzi11/11/2025, 14:00
Identifying suitable substrate materials is a key challenge for the development of future cryogenic gravitational-wave detectors. Achieving both low thermal noise and low optical absorption is critical for ensuring detector sensitivity and stable cryogenic operation. At the Materials for Advanced Detectors (MAD) workshop, that held in October at IKZ (Berlin) these challenges will be discussed...
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Tania Hinderer11/11/2025, 14:10
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Cristiano Palomba11/11/2025, 14:20
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Dwight Baldwin (Vrije Universiteit Brussel), Alberto Roman Gessa Fernandez (Vrije Universiteit Brussel), Marijke Huysmans (Vrije Universiteit Brussel)11/11/2025, 14:20
Comprehensive hydrogeological and groundwater modelling studies are underway to assess feasibility of the construction of the Einstein Telescope (ET) facility in the Euregion Meuse-Rhine (EMR) region. The facility includes ~30 km tunnels with 10 m of width arranged in a triangular shape, and shafts and cavern structures in the corners. The construction and operation of this facility will...
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Sebastian Steinlechner11/11/2025, 14:20
ETpathfinder is a testbed for interferometry at cryogenic temperatures. Following the design of ET-LF, ETpathfinder's arm cavities will consist of silicon mirrors at an operating temperature of around 18K. In our field, silicon is a new material for high-precision, low-loss optics, with many open questions on material properties and manufacturing capabilities. Here we will give an overview of...
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Harald Pfeiffer (Max-Planck-Institute for Gravitational Physics)11/11/2025, 14:30
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Andrea Maselli11/11/2025, 14:40
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Philippe Orban11/11/2025, 14:40
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Angélique Lartaux (IJCLab)11/11/2025, 14:40
In this presentation we will present an overview of the status of the squeezing subsystem from the squeezing source to its injection into the interferometer, including the filter cavities and the control strategy.
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This presentation will be based on the work inside the squeezing working group, the task force and the preparation of the TDR. It will include discussion on R&D developments... -
Anuradha Samajdar, Prof. Gianluca Maria Guidi, Justin Janquart, Tito Dal Canton (IJCLab)11/11/2025, 14:50
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Johan Rutten MSc.11/11/2025, 15:00
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Michele Maggiore11/11/2025, 15:00
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Daniel Voigt11/11/2025, 15:00
As straylight is an important limitation for the sensitivity of gravitational wave detectors, we investigate new laser operation concepts and interferometer topologies for a more straylight-resilient detector configuration.
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Our focus is the use of tunable coherence realized by phase modulation following a pseudo-random-noise (PRN)-sequence on the interferometer laser. This breaks the... -
Marica Branchesi11/11/2025, 15:05
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Andrea Begnoni11/11/2025, 15:50
Gravitational waves from compact binary coalescences (CBCs) have become a robust and powerful tool for testing General Relativity (GR), in fact, to date, the LIGO-Virgo-KAGRA collaboration has provided significant consistency tests of GR.
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In this talk, I will present forecasts for the precision with which GR can be tested using third-generation interferometers, such as the Einstein Telescope.... -
Dr Michiel van Limbeek (University Twente)11/11/2025, 15:50
In preparation for Einstein telescope, strategies to cool down the cryogenic payloads and cryotraps without introducing excess technical noise need to be developed and validated. A viable, ultra-low vibrational-noise strategy is to employ sorption coolers for low temperatures and sub-cooled liquid Nitrogen for intermediate temperatures. This technology is chosen in ETpathfinder. We will...
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Francesca Scipione (Sapienza Università di Roma)11/11/2025, 15:50
The Einstein Telescope (ET) research infrastructure is set to become the pioneering next-generation underground observatory for gravitational wave detection.
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ET engineering design demands a multi-criteria approach to identify and address geological, geotechnical, environmental, and landscape challenges. To address these complexities, a Design Digital Twin (DDT) is being developed as a... -
Andrea Contu (INFN Cagliari)11/11/2025, 16:10
The Sos Enattos site in Sardinia remains a key location for multidisciplinary research activities in support of the development of the Einstein Telescope (ET), a next-generation gravitational wave observatory. Current efforts include deploying advanced seismic, magnetic and environmental sensor arrays at various depths to enable long-term monitoring of site stability and noise levels....
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Syed Naqvi11/11/2025, 16:10
Testing the binary black hole nature of compact binaries relies on the “no-hair” conjecture, which posits that a Kerr black hole's properties are fully characterized by its mass and spin. This conjecture underpins tests applied to circular compact binaries detected by gravitational wave (GW) detectors, where the quadrupole moment depends solely on mass and spin. In contrast, exotic compact...
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Julien Gargiulo11/11/2025, 16:10
The Einstein Telescope (ET) will be the first third-generation gravitational wave observatory, requiring an underground vacuum system of unprecedented scale. The system will comprise more than 60 large unbaked chambers (“towers”), spanning ∼10^5 m² of surface area and a volume of ∼10^4 m³. Achieving and maintaining the required vacuum levels presents a unique challenge: ET must reach pressures...
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65. Detection prospects of parity-violating gravitational waves in third-generation ground detectorsHannah Duval11/11/2025, 16:30
We investigate the prospects for detecting a parity-violating gravitational-wave background with third-generation ground-based detector networks through an adapted theoretical approach combined with a data-based approach. We focus on a variety of networks consisting of an Einstein Telescope and two Cosmic Explorer detectors, varying the Einstein Telescope design, detector locations,...
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Matteo Di Giovanni11/11/2025, 16:30
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Michael Kiehn11/11/2025, 16:30
Taking the experience from the 2022 drilling and seismic acquisition campaign on board the subsurface team of the EMR-regions devised a second data acquisition program that was executed from Q2 2024 to Q1 2025. The purpose of the campaign was to enable the construction of a 3D integrated subsurface model in support of civil engineering, and hydrogeological as well as seismic noise modelling....
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Jan Harms, Stefan Hild11/11/2025, 16:50
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Matteo Schulz (Gran Sasso Science Institute)11/11/2025, 16:50
Multi-probe techniques have proven to be powerful tools in modern cosmology.
By breaking degeneracies, they provide new ways to gain insights into the large-scale structure (LSS) of the Universe and its evolution.In this talk, we explore the potential of cross-correlation between gravitational waves (GWs) and 21 cm intensity mapping from neutral hydrogen emission (HI), focusing on its...
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Dr Marco Olivieri (Istituto Nazionale di Geofisica e Vulcanologia)11/11/2025, 16:50
The characterization of local seismic noise is of paramount importance for evaluating candidate locations for hosting the Einstein Telescope (ET), the third-generation gravitational wave detector. Three temporary seismic arrays were installed at the Italian candidate site for ET, each with different geometrical layouts, recording durations, and total numbers of stations. Here, we provide an...
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Giovanni Antinozzi11/11/2025, 17:10
The persistence of the Hubble tension requires new validation methods. While gravitational waves provide a promising solution, the rarity of standard sirens has forced to rely on dark sirens and as such, a wealth of dark sirens methods have been developed.
In this talk we will explore our new state-of-the-art models for binary black hole (BBH) merger rates and their applications to...
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Edit Fenyvesi (Wigner RCP)11/11/2025, 17:10
Third-generation terrestrial gravitational-wave detectors, such as the Einstein Telescope and Cosmic Explorer, would offer significantly greater sensitivity and a wider frequency range than existing detectors. Third-generation detectors are designed to be able to detect gravitational waves below 10 Hz. In this frequency range, seismic noise and gravitational gradient noise (also known as...
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Marco Olivieri11/11/2025, 17:30
The Einstein Telescope (ET) project, a significant leap in gravitational wave observatories, demands an exceptionally stable environment to minimise seismic noise. To ensure the most suitable site selection, we conducted a meticulous ground motion analysis, integrating historical and recent instrumental earthquakes relevant to the area. By utilising ShakeMaps and severe ground motion...
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Patrice Verdier (IP2I Lyon - IN2P3), Stefano Bagnasco12/11/2025, 09:00
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Alessandro Trani12/11/2025, 09:00
Disentangling the astrophysical origins of gravitational waves requires confronting population properties of observed source catalogs with theoretical predictions. We investigate the formation of merging binary black holes in two distinct environments: stellar clusters and active galactic nuclei (AGNs). In clusters, repeated three-body interactions determine the dynamical assembly of binaries....
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Paul Laycock12/11/2025, 09:20
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Lorenzo Pierini (Istituto Nazionale di Fisica Nucleare)12/11/2025, 09:20
Wide-band searches for continuous gravitational waves are essential to reveal unknown neutron stars without an electromagnetic counterpart. Such searches, however, cover a huge parameter space that makes them computationally bounded. Neutron stars are predicted to slow down their rotation by losing energy through a variety of physical mechanisms, including, e.g, electromagnetic and...
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Dr David Alvarez Castillo (Institute of Nuclear Physics Polish Academy of Sciences)12/11/2025, 09:40
In this work we present the properties of gravitational waves emitted from the f-mode oscillation of a compact star corresponding to the Object HESS J1731-347 as a Twin Compact Star, a hybrid neutron star with the same mass as a larger, purely hadronic neutron star. HESS J1731-347 is a peculiar object due to its reported compactness consisting of a mass of 0.77 solar masses and a radius of...
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12/11/2025, 09:40
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Lia Lavezzi (INFN Torino)12/11/2025, 09:55
The Einstein Telescope will be able to observe a sky volume one thousand times larger than the second generation observatories and this will be reflected in a higher observation rate. The physics information contained in the strain time series will increase, while on the machine side the size of the raw data from the interferometers will scale with the number and the complexity of the...
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Cristiano Palomba12/11/2025, 10:00
All-sky searches for continuous gravitational wave signals, like those expected from asymmetric rotating neutron stars, require to analyse long stretches of data in order to increase the signal-to-noise ratio.
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Typically, the heavy processing part starts after all the data to be analysed have been collected. Such a strategy is sub-optimal from a computational perspective and can significantly... -
Stefano Dal Pra (INFN-CNAF)12/11/2025, 10:10
The Einstein Telescope (ET) is a next-generation, underground gravitational-wave observatory designed to explore the Universe across its cosmic history. Its ambitious scientific goals, ranging from probing black-hole physics and neutron-star matter to investigating dark energy and the early Universe, require a new generation of computational
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and data-analysis infrastructures. Our contribution... -
Prof. Zeljka Bosnjak (FER)12/11/2025, 10:20
The detection of gravitational waves associated with short GRBs and
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observations of the TeV photons from very energetic events were the
main breakthroughs in the gamma-ray burst field in past few years. I will
discuss the recent multi-wavelength observations and theoretical progress
in modelling of prompt GRB emission, including the lepto-hadronic emission
model and the model for VHE... -
Stefan Krischer (RWTH Aachen University)12/11/2025, 10:25
Minimizing environmental impact is essential for the Einstein Telescope, both as a societal responsibility and to meet the expectations of funding agencies. Computing will account for a significant share of operational energy use and is therefore a key focus. We are developing a concept for a climate-neutral ET computing center that uses intelligent workload scheduling to align load with...
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Giuseppe Greco12/11/2025, 10:40
The recent article published in Astronomy and Computing, Encapsulating Textual Contents into a MOC data Structure for Advanced Applications, introduces the first steps toward preliminary standards for Generative Artificial Intelligence within the Virtual Observatory framework.
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In this talk, we will present the main concepts of the work, focusing on how to design agentic workflows in the... -
Dr Huw Haigh (MBI Vienna)12/11/2025, 10:40
We present the implementation, testing, and results of an anomaly detection pipeline based on convolutional autoencoders. After testing on white noise, we proceed to a test using MDC 1 focusing on mergers involving IMBHs and provide the results.
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Prof. Dorota Rosinska (University of Warsaw)12/11/2025, 11:30talk
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Dr Valentin Tempel (RWTH)12/11/2025, 11:30
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Alessandro Variola (Istituto Nazionale di Fisica Nucleare), Fiodor Sorrentino, oussama EL MECHERFI12/11/2025, 11:30
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Francesco Sarandrea (INFN Torino), Lorenzo Asprea12/11/2025, 11:30
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Prof. Dorota Rosinska (University of Warsaw), Yuliya Hoika (University of Warsaw)12/11/2025, 11:35talk
The presentation will highlight recent achievements within WP 10 of the Einstein Telescope Preparatory Phase (ET-PP), covering communication, education, and citizen engagement. It will focus on recent deliverables, updates in social media and website activities, and the development of outreach materials and resources within the shared communication repository.
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Gonzalo Merino12/11/2025, 11:45
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Dr Stan Bentvelsen (Nikhef)12/11/2025, 11:50
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Henk Schroen (Nikef)12/11/2025, 12:00
Einstein Telescope: much more than a scientific project!
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And in the field of communication in het EMR-project: need to know and nice to know, four languages, but one voice. And customised solutions where necessary. -
Fiodor Sorrentino, Romano Meijer (Nikhef)12/11/2025, 12:00
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Dr Andreas Rietbrock12/11/2025, 12:10
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12/11/2025, 12:15
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Matteo Serra12/11/2025, 12:20talk
ET Italy: updates on communication and public engagement activities
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In this talk we present the latest updates on the communication activities underway to promote Italy's candidacy to host the Einstein Telescope. These activities range from institutional communication to the organization of local, national and international events, as well as media relations and public engagement initiatives. -
Roberto Fontana (University of Pisa)12/11/2025, 12:30
The detection of gravitational waves with large-scale laser interferometers such as LIGO and VIRGO has opened a new era in physics, and the scientific community is now planning to build the Einstein Telescope (ET), a next-generation detector with significantly higher sensitivity. These instruments are highly sensitive to seismic noise from natural and anthropogenic sources. In particular, the...
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Frederik Moers (MSE, RWTH Aachen), Romano Meijer (Nikhef)12/11/2025, 12:30
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Giuseppe Greco, Matteo Tuveri (Università di Cagliari e INFN Cagliari), simone mastrogiovanni12/11/2025, 12:40
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Mike Lindner (DESY - DZA)12/11/2025, 14:00talk
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Tomislav Andric12/11/2025, 14:00
Improved low-frequency sensitivity of gravitational wave observatories would unlock study of intermediate-mass black hole mergers and binary black hole eccentricity and provide early warnings for multimessenger observations of binary neutron star mergers. Today’s mirror stabilization control injects harmful noise, constituting a major obstacle to sensitivity improvements. We eliminated this...
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Filippo Santoliquido12/11/2025, 14:00
The Einstein Telescope (ET), along with other next-generation gravitational wave (GW) detectors, will be a key instrument for detecting GWs in the coming decades. However, analyzing the data and estimating source parameters will be challenging, especially given the large number of expected detections – of order $10^5$ per year – which makes current methods based on stochastic sampling...
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Pooya Saffarieh12/11/2025, 14:15
We present a multi-scale optimal control framework for active seismic isolation in the Einstein Telescope, a third-generation gravitational-wave observatory. Our approach jointly optimizes feedback and blending filters in a cross-coupled opto-mechanical system using a unified cost function based on the "acausal optimum," which quantifies sensor signal-to-noise ratios across frequencies. This...
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Martin Hendry (University of Glasgow)12/11/2025, 14:20talk
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Harsh Narola12/11/2025, 14:20
Third-generation gravitational wave detectors such as Einstein Telescope and Cosmic Explorer will have significantly better sensitivities than current detectors, as well as a wider frequency bandwidth. This will increase the number and duration of the observed signals, leading to many signals overlapping in time. If not adequately accounted for, this can lead to biases in parameter estimation....
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Patrick Schillings (RWTH Aachen University)12/11/2025, 14:30
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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Qian Hu12/11/2025, 14:40
Overlapping gravitational wave (GW) signals are expected in the third-generation (3G) GW detectors, leading to one of the major challenges in GW data analysis. Inference of overlapping GW sources is complicated - it has been reported that hierarchical inference with signal subtraction may amplify errors, while joint estimation, though more accurate, is computationally expensive. However, in...
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Enrico Calloni12/11/2025, 14:45
In Sos Enattos, the installation of the first double-arm suspended
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balance with interferometric reading has been completed. The system
consists of a reference arm with a high moment of inertia and a
measurement arm, with low moment of inertia, suspending at one end a
lead sample and at the other end an aluminum sample. The aluminum sample is in turn. immersed in a thermal chamber to allow... -
Gideon Koekoek12/11/2025, 14:50talk
As announced in previous talks at the ET-meetings, an international summer school on teacher professionalisation was in the works: MaGIC. The first edition was held last Summer in Maastricht, hosting 25 teachers from Europe exploring together the theory of gravitational wave physics and their measurements and noise mitigation, as well as the didactics to bring this back into their classroom...
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Edoardo Milotti (University of Trieste and INFN-Sezione di Trieste)12/11/2025, 15:00
We describe a fast glitch removal method based on the continuous wavelet transform. We give a full statistical characterization of the method and illustrate it with practical examples based on publicly available LVK data.
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Davide Rozza (University of Milano-Bicocca & INFN-MIB)12/11/2025, 15:00
The Sos Enattos area in Sardinia, Italy, is one of the most promising locations for the Einstein Telescope (ET), a next-generation underground gravitational wave observatory. In this study, we present the results of a recent environmental magnetic noise analysis aimed at characterising natural noise sources in the low-frequency band. Using a network of sensors deployed in the region, we...
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Flavio Travasso12/11/2025, 15:00
Crystalline materials play a key role in defining the design and the thermal and structural behavior of suspensions used for the test masses in upcoming gravitational wave interferometers that will employ cryogenic payloads. This talk will highlight the latest advancements from a collaborative research effort involving several laboratories, research centers, and private companies focused on...
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Gideon Koekoek12/11/2025, 15:10talk
Throughout Europe and in the Einstein Telescope Collaboration, there exist many great initiatives to share Einstein Telescope out of academica to stakeholders in education, politics, and general public. This is a vital part of our enterprise to realise ET, and many partners are sharing their best practices, including in the EMR. In this talk, I will highlight some of these initiatives and...
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Chun-Fung Wong (KU Leuven)12/11/2025, 15:20
Gravitational-wave (GW) astronomy has revolutionized our understanding of the universe, but the precision of its discoveries hinges on the accurate calibration of GW detectors. In this talk, we present a novel Bayesian null-stream method for self-calibration of closed-geometry GW detector networks, such as the Einstein Telescope (ET) and LISA. Unlike traditional approaches that rely on...
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Francesca Spada12/11/2025, 15:20
We present the conceptual design of a six-degrees-of-freedom (6-D) active preisolator, building on the experience of the Virgo Superattenuator. The goal is to extend active control from the current three translational degrees of freedom to the full 6-D configuration, combining a mechanically optimized supporting structure with piezoelectric actuators and dedicated control strategies. The...
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Mr Reinhardt Rading (Helmut-Schmidt-Universität/Universität der Bundeswehr Hamburg)12/11/2025, 15:20
Distributed Acoustic Sensing (DAS) turns standard telecommunication fibers into dense seismic arrays with thousands of measurement points. Within the WAVE initiative, a 16 km fiber provides more than 16,000 virtual seismic channels in collaboration with DESY on the Bahrenfeld research campus in Hamburg. The project investigates how such large-scale DAS networks can advance environmental...
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12/11/2025, 15:25talk
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Riccardo De Salvo (California State University of Los Angeles)12/11/2025, 15:40
The Low Frequency interferometer of the Einstein Telescope will use cryogenic mirror suspensions with long pendulum providing horizontal attenuation to filter out the horizontal thermal noise generated by the seismic attenuation chain and by the heat links. They will be made of crystalline materials to minimize their own thermal noise generation.
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It is almost impossible to make passive... -
Dr Soumen Roy (UCLouvain / Royal Observatory Belgium)12/11/2025, 15:40
As gravitational-wave detectors gain sensitivity at low frequencies, inferring source properties becomes challenging due to long-duration signals and high signal-to-noise ratios. With enhanced low-frequency sensitivity, we also expect to observe many more eccentric binaries, with potentially a large impact on our understanding of binaries. The presence of orbital eccentricity enhances the...
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Tomasz Bulik12/11/2025, 15:40
I present the analysis of the infrasound measurements at the Sos Enattos mine. I discuss the correlations between different stations. Additionally I present the level of the infrasound induced newtonian noise and discuss the ways to mitigate its influence on the detector.
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Louis Smoor, Roberto Cimino13/11/2025, 09:30
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Andrew Harrison13/11/2025, 09:50
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Yuliya Hoika (University of Warsaw)13/11/2025, 10:10talk
The communication landscape of the Einstein Telescope is evolving into a dynamic European network connecting the Einstein Telescope Preparatory Phase (ETPP) project, local communication teams in Sardinia, the Euregio-Meuse-Rhine region, Lusatia, and beyond. The presentation will highlight recent supranational achievements, including the implementation of the new visual identity, the growing...
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Jennifer Docherty13/11/2025, 10:25
The Einstein Telescope will utilise cryogenic cooling in the low-frequency detector, and will therefore require crystalline materials in the suspension and optical components. The material properties of these suspension materials should not limit the thermal noise performance, requiring low mechanical loss, high thermal conductivity, and suitable tensile strength. With this, there is an...
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Sebastian Steinlechner13/11/2025, 10:40
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Andreas Freise, Fernando Ferroni (GSSI)13/11/2025, 11:30
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Daniela Trani, Mauro Morandin (INFN-PD)13/11/2025, 12:05
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Mario Martinez13/11/2025, 12:25
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Patrick Werneke13/11/2025, 12:40
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Domenico D'Urso, Dr Wim Walk (Nikhef)14/11/2025, 09:30
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Stan Bentvelsen14/11/2025, 09:40
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Andreas Rietbrock, Andreas Rietbrock14/11/2025, 10:00
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Giovanni Bisoffi14/11/2025, 10:20
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Patrice Verdier (IP2I Lyon - IN2P3), Stefano Bagnasco14/11/2025, 11:10
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Archisman Ghosh (Universiteit Gent), Marica Branchesi, Michele Maggiore14/11/2025, 11:30
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Jan Harms, Stefan Hild14/11/2025, 11:50
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14/11/2025, 12:10
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Harald Lueck, Michele Punturo (INFN)14/11/2025, 12:15
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Lorenzo AielloISB - Otherposter
One of the main limitations for the sensitivity of the current and future gravitational wave ground-based interferometers come from the optical aberrations - which impact the possibility to operate the detector at high power, a required condition to improve the quantum noise. As next-generation detectors such as ET-HF aim for circulating powers of up to 3 MW, addressing these issues requires...
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simone Lombardi (INAF Padova)
The ETIC-ADONI optical bench is an experiment carried out within the PNRR
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ETIC project (Einstein Telescope Infrastructure Consortium). It is located at the
Astrophysical Observatory of Arcetri in Florence, and its objective is to investi-
gate the application of a deformable mirror (DM)—already employed by INAF in
adaptive optics (AO) for ground-based astronomical observations—to the... -
Aurelie Mailliet, Nicola Canale (University of Ferrara - INFN Ferrara)
To reach the sensitivity requirement of Einstein Telescope for gravitational waves detection, the birefringence of optic substrates must be optimised. The intrinsic birefringence of such substrates mainly comes from internal stress within the material, but can also be induced externally (by optical mounts for instance).
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The Ferrara ET Research Unit has been working on 2D birefringence maps... -
Tomislav Andric
GEMINI is an underground research and development facility dedicated to advancing seismic isolation and control technologies for future gravitational-wave observatories. Its primary mission is to support the Einstein Telescope (ET) by providing a testbed for inter-platform control strategies, essential for stabilizing auxiliary interferometer degrees of freedom. The facility consists of...
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Qian Hu
Bayesian inference with stochastic sampling has been widely used to obtain the properties of gravitational wave (GW) sources. Although computationally intensive, its cost remains manageable for current second-generation GW detectors because of the relatively low event rate and signal-to-noise ratio (SNR). The third-generation (3G) GW detectors are expected to detect hundreds of thousands of...
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Valeria Milotti (University of Padova, INFN PD)
A major limiting factor in improving sensitivity of Gravitational Wave (GW) detectors is thermal noise in the amorphous mirror coatings of interferometric gravitational-wave detectors. This is especially true for the crucial frequency range around 100 Hz in room-temperature detectors. Mirror coatings are deposited by Ion-Beam Sputtering and designed as thickness-optimized Bragg’s...
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Dr Joris van Heijningen (VU Amsterdam)
Future gravitational-wave (GW) detectors such as Einstein Telescope (ET) will be cryogenic to decrease thermal noise to be sensitive to low-frequency GWs. In addition to this thermal noise reduction, there is an opportunity for superconductive technology introduction. We can just make our current interferometric sensing and coil-magnet actuation cryo-compatible, but superconductivity solutions...
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Christophe Collette
This talk will present the latest achievements in active seismic isolation on the E-TEST prototype. The E-TEST prototype is a facility for the Einstein Telescope. It serves as a unique full-scale test bench designed to suspend a 100 kg test mass, cooled down to cryogenic temperatures through radiative cooling, and isolated using an inverted pendulum mounted on an active platform. This...
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Riccardo De Salvo (California State University of Los Angeles)
We propose to replace the large underground halls with a short tunnel section above the main one, connected by vertical wells that host the seismic attenuation chains. This solution has substantial advantages in terms of physics performance, engineering, safety and even cost.
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By placing the heads of the seismic attenuation chains on the bedrock of the upper tunnel it removes them from the... -
Stefano Mais (DICAAR, Università degli Studi di Cagliari)
The Einstein Telescope project belongs to an unprecedented infrastructural dimension: a system of underground tunnels forming a triangular layout with 10 km-long sides, located about 300 meters below the surface. It is set to redefine not only the paradigms of scientific research, but also the settlement patterns, cultural frameworks, and landscapes of the territories chosen to host this...
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Matteo Di Giovanni (La Sapienza Università di Roma - INFN Roma)
In this talk we present the summary of a set of environmental noise measurements conducted on cryogenic facilities at CERN and at the University of Tokyo. The goal is to assess the impact on the background noise levels of these facilities and to provide valuable information for the design of noise suppression systems in Einstein Telescope. In fact, one of the key features of Einstein Telescope...
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Giuseppe Greco
ETIC (Einstein Telescope Infrastructure Consortium) project, an initiative by the Italian Ministry of University and Research, led by the National Institute for Nuclear Physics (INFN). Launched in 2023, the project has two main objectives: conducting a feasibility and site characterization study in Sos Enattos, and developing a national network of laboratories within INFN, universities, and...
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Paul Ophardt (Helmut-Schimidt-Universität)
Newtonian noise (NN) induced by seismic density fluctuations limits the sensitivity of current and future gravitational-wave detectors. In particular, it poses a significant challenge to achieving the low-frequency benchmark sensitivity of the upcoming third-generation detector Einstein Telescope (ET). Several mitigation strategies for NN in ET have been proposed, all of which rely on arrays...
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Markus Walther
Radiation pressure noise at low frequencies remains a key challenge for the Einstein Telescope (ET). One approach is active stabilization using ultralight micromirrors suspended by extremely soft springs, providing large displacement response to fluctuating photon pressure. These devices are fabricated on silicon-on-insulator wafers and released by vapor HF etching, yielding mechanically...
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Tim Kuhlbusch (RWTH Aachen University)
Predicting specific noise realizations from witness sensors will be an essential technique to improve the sensitivity of the Einstein Telescope. Different techniques, like classical or deep learning filters, can be employed to reduce the Newtonian noise level. We are presenting a Python framework that automates the evaluation of multiple noise cancellation techniques on a set of simulated or...
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Mohamed Elbashbishy (Forschungszentrum Jülich GmbH)
Ultra-high vacuum (UHV) systems are critical in experimental physics and engineering, particularly in projects like the Einstein Telescope (ET), where even minor leaks can affect precision measurements and large leaks can destroy the setup. For this reason, mechanical components such as fast shutters can be used to protect the system. Large leaks can generate pressure fronts propagating at...
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Thomas Siefke
The thermal noise of the end-test-mass mirrors in gravitational-wave detectors remains a major sensitivity limitation, largely due to the multi-layer Bragg-mirror-stacks required to achieve ultra-high reflectance. For the next-generation Einstein Telescope (ET), we propose a stacked-mirror approach that combines the complementary advantages of metasurfaces and Bragg mirrors, while mitigating...
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Dr Iryna Buchovska (Leibniz-Institut für Kristallzüchtung)
Monocrystalline silicon fibers are a promising candidate for suspending silicon test masses in gravitational-wave detectors. The excellent thermal and mechanical properties of crystalline silicon enable stable support of heavy mirrors and efficient extraction of laser-induced heat. Moreover, silicon's exceptional material behavior at cryogenic temperatures aligns well with the operational...
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Lucia Trozzo
The era of third-generation gravitational wave detectors is approaching, and the Einstein Telescope (ET) a large size interferometer, is becoming a concrete reality. The underground installation of the instrument offers significant advantages from seismic and local disturbances point of views: seismic noise level, indeed, is reduced by a factor of 100 compared to surface locations. In...
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Elisabet Vallejo (IFAE)
The Einstein Telescope (ET), a next-generation underground gravitational-wave observatory, aims to extend sensitivity to lower frequencies through cryogenic cooling of its main optics. A critical challenge in this design is the cryoarea, where baffles must operate under extreme cryogenic conditions that alter material, thermal, optical, and vibrational properties. Building on previous studies...
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Abhay Karia (Nikhef)
The detection of low-frequency gravitational waves (below 10 Hz) is critical for probing the astrophysical origins of black holes and for expanding the observable frequency range of next-generation interferometers. However, current detectors are fundamentally limited in this regime by seismic noise and tilt-to-horizontal coupling. The Omnisens project: a 6D interferometric inertial isolation...
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Ismail El Ouedghiri-Idrissi
The next generation of gravitational wave detectors, such as the Einstein Telescope and LIGO Voyager, requires unprecedented sensitivity. A key limitation to this sensitivity is thermal noise from mirror coatings, particularly within their most sensitive frequency range. To address this, next-generation detectors are shifting toward cryogenic low-frequency interferometers, with silicon serving...
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Nicole Busdon
One of the most critical components of gravitational wave interferometers is their mirror test masses, as coating thermal noise is a primary limiting factor in the 20–2000 Hz frequency range. For this reason, one of the two nested interferometers composing the Einstein Telescope (ET-LF) is designed to operate at cryogenic temperatures. However, characterizing both mechanical and optical losses...
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Francesco Bianchi
The ET layout provides space for the vacuum towers of the LF and HF interferometers. The towers will be housed in caverns designed to facilitate manoeuvring operations and ensure correct spacing between the components of the interferometers. Both LF and HF towers will need to be installed on a basement to make use of the space underneath them for manoeuvring. Furthermore, the cryogenic towers...
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Lorenzo Asprea
The increasing data volume from gravitational-wave observatories presents both an opportunity for new discoveries and a significant challenge for existing analysis methods. While deep learning models, particularly those designed for image processing, are powerful tools for analyzing 2D time-frequency representations of transient signals, their application has been limited by a fundamental...
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Barbara Garaventa
The Einstein Telescope Infrastructure Consortium (ETIC), coordinated by INFN, has developed laboratories to support the future Einstein Telescope and to carry out site characterization at Sos-Enattos, in Sardinia (Italy). This poster presents the GALILEO project at INFN and the University of Genoa. The initiative includes a new quantum optics laboratory, equipped with two 1550 nm laser...
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Tatevik Chalyan
One of the limiting factors for gravitational wave detection sensitivity to date is the coating thermal noise in the lower audio-band. The use of cryogenically cooled crystalline silicon in combination with high-quality silicon-based coatings for the test mass mirrors will allow tackling the thermal noise problem. In the gravitational wave interferometry, moving the laser wavelengths to 2 µm...
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Andrea Moscatello
High-sensitivity optical measurements, such as those carried out in interferometric gravitational-wave detectors, are highly susceptible to stray light noise. Because of the exceptional quality of the optics employed, scattering is often dominated by residual particulate contamination. This represents a critical challenge not only for the next-generation Einstein Telescope but also for current...
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Roberto Cimino
In the upcoming generation of gravitational wave detectors (GWDs), the use of cryogenic mirrors is a great technological challenge and may present potentially new noise sources limiting the desired sensitivity. As shown in KAGRA, frost formation on cold optics is a known severe issue for cryogenic GWDs. Also, the mirror charging, as observed in LIGO, may severely affect sensitivity, and the...
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Jessica Steinlechner
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A. Erbanni, A. Pasqualetti, B. Piffre, G. Gargiulo, L. Francescon (EGO), T. Zelenova
The ET cryogenic tower will host the test mass (TM) operating at 10–20 K, where key challenges are attaining the exceptionally low vacuum level (normally the lowest in the entire ET system) and realizing the cryostat with ultra-low noise technology.Large-scale prototype initiatives have been launched by major laboratories to investigate cryostat design and cooling strategies, and dedicated...
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Mariusz Suchenek
The Einstein Telescope (ET), as a next-generation underground gravitational wave observatory, requires a comprehensive environmental monitoring system to achieve its ambitious sensitivity goals. Dense arrays of seismic and infrasound sensors must operate continuously to track local and global disturbances and to support advanced noise mitigation strategies. Given the large number of sensors...
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Jan-Niklas Feldhusen (University of Hamburg)
Deep Frequency Modulation Interferometry (DFMI) offers a powerful approach to achieve precise displacement readout as well as absolute ranging with reduced complexity and compact sensing heads. Minimizing local sensing noise is crucial to reduce controls noise in e.g. active suspension damping and therefore DFMI will be a crucial technology to achieve the low-frequency sensitivity of future...
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Simone Marchetti
The detection of gravitational waves (GWs) depends upon interferometers that use mirrors specifically designed to reduce both optical absorption and mechanical dissipation, thus meeting the high sensitivity demands necessary for detection. Advanced mirror coatings are made up of alternating thin layers of dielectrics such as tantalum oxide (Ta₂O₅), doped with TiO₂, and silicon dioxide (SiO₂)....
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