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...
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...
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...
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...
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...
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.
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...
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...
The Einstein Telescope (ET) research infrastructure is set to become the pioneering next-generation underground observatory for gravitational wave detection.
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...
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....
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,...
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...
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...
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...
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...
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...
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...
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
and data-analysis infrastructures. Our contribution...
The detection of gravitational waves associated with short GRBs and
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...
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...
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.
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.
Einstein Telescope: much more than a scientific project!
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.
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...
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...
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.
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...
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...
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...
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.
It is almost impossible to make passive...
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...
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.
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...
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).
The Ferrara ET Research Unit has been working on 2D birefringence maps...
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...
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.
By placing the heads of the seismic attenuation chains on the bedrock of the upper tunnel it removes them from the...
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...
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...
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...
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...
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...
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...
