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class="inputbox search-query input-medium" type="search" placeholder="Search ..." /> <button class="button btn btn-primary" onclick="this.form.searchword.focus();">Search</button> <input type="hidden" name="task" value="search" /> <input type="hidden" name="option" value="com_search" /> <input type="hidden" name="Itemid" value="103" /> </form> </div> </div> </div> </header> <div class="site-grid"> <div class="container-banner full-width"> <div id="mod-custom124" class="mod-custom custom"> <p><img src="/images/HeaderET3.png" width="2000" height="333" /></p></div> </div> <div class="grid-child container-sidebar-left"> <div class="sidebar-left card _menu"> <h3 class="card-header ">Main Menu</h3> <div class="card-body"> <ul class="mod-menu mod-list nav "> <li class="nav-item item-103 default current active deeper parent"><a href="/index.php" aria-current="page">ET</a><ul class="mod-menu__sub list-unstyled small"><li class="nav-item item-410"><a href="/index.php/home/et-governance" >ET Governance</a></li><li class="nav-item item-412"><a href="/index.php/home/national-and-regional-et-web-sites" >National and Regional ET web sites</a></li></ul></li><li class="nav-item item-26"><a href="/index.php/news" >News</a></li><li class="nav-item item-169"><a href="https://www.facebook.com/EinsteinTelescope/" target="_blank" rel="noopener noreferrer">Facebook</a></li><li class="nav-item item-76"><a href="https://apps.et-gw.eu/tds/" target="_blank" rel="noopener noreferrer">ET-Docs Codifier</a></li><li class="nav-item item-202"><a href="/index.php/et-wiki" target="_blank">ET Wiki</a></li></ul> </div> </div> <div class="sidebar-left card "> <h3 class="card-header ">ET Collaboration</h3> <div class="card-body"> <ul class="mod-menu mod-list nav "> <li class="nav-item item-381 parent"><a href="/index.php/the-et-collaboration" >The ET collaboration</a></li><li class="nav-item item-338"><a href="/index.php/et-collaboration-meetings" >ET collaboration meetings</a></li><li class="nav-item item-23"><a href="/index.php/job-opprtunities-a-fellowship?types[0]=1" >Job Opportunities & Fellowship</a></li><li class="nav-item item-2 parent"><a href="/index.php/presentation" >ET utilities</a></li><li class="nav-item item-200"><a href="/index.php/esfri-proposal" >ESFRI Proposal</a></li><li class="nav-item item-198"><a href="/index.php/relevant-et-documents" >Relevant ET Documents</a></li><li class="nav-item item-68"><a href="/index.php/etsensitivities" >ET sensitivities</a></li><li class="nav-item item-41 parent"><a href="/index.php/etimages" >ET Images</a></li><li class="nav-item item-58 parent"><a href="/index.php/meetandevt" >Past Meetings and Events</a></li></ul> </div> </div> </div> <div class="grid-child container-component"> <div id="system-message-container" aria-live="polite"></div> <main> <div class="blog-featured"> <div class="blog-items items-leading "> <div class="blog-item"> <div class="item-content"> <h2 class="item-title"> Introduction </h2> <dl class="article-info text-muted"> <dt class="article-info-term"> Details </dt> <dd class="createdby"> <span class="icon-user icon-fw" aria-hidden="true"></span> Written by: <span>Administrator</span> </dd> <dd class="create"> <span class="icon-calendar icon-fw" aria-hidden="true"></span> <time datetime="2008-10-10T22:28:54+02:00"> Created: 10 October 2008 </time> </dd> <dd class="modified"> <span class="icon-calendar icon-fw" aria-hidden="true"></span> <time datetime="2020-09-09T10:51:30+02:00"> Last Updated: 09 September 2020 </time> </dd> <dd class="hits"> <span class="icon-eye icon-fw" aria-hidden="true"></span> <meta content="UserPageVisits:48191"> Hits: 48191</dd> </dl> <p>The Einstein Telescope (ET) is a proposed underground infrastructure to host a third-generation, gravitational-wave observatory. It builds on the success of current, second-generation laser-interferometric detectors Advanced Virgo and Advanced LIGO, whose breakthrough discoveries of merging black holes (BHs) and neutron stars over the past 5 years have ushered scientists into the new era of gravitational-wave astronomy. The Einstein Telescope will achieve a greatly improved sensitivity by increasing the size of the interferometer from the 3km arm length of the Virgo detector to 10km, and by implementing a series of new technologies. These include a cryogenic system to cool some of the main optics to 10 – 20K, new quantum technologies to reduce the fluctuations of the light, and a set of infrastructural and active noise-mitigation measures to reduce environmental perturbations.</p> <p><img title="ET pictorial" src="/images/ET_pictoria-ESFRI-reduced.png" alt="ET pictorial" width="500" height="281" /></p> <p>The Einstein Telescope will make it possible, for the first time, to explore the Universe through gravitational waves along its cosmic history up to the cosmological dark ages, shedding light on open questions of fundamental physics and cosmology. It will probe the physics near black-hole horizons (from tests of general relativity to quantum gravity), help understanding the nature of dark matter (such as primordial BHs, axion clouds, dark matter accreting on compact objects), and the nature of dark energy and possible modifications of general relativity at cosmological scales. Exploiting the ET sensitivity and frequency band, the entire population of stellar and intermediate mass black holes will be accessible over the entire history of the Universe, enabling to understand their origin (stellar versus primordial), evolution, and demography. ET will observe the neutron-star inspiral phase and the onset of tidal effects with high signal-to-noise ratio providing an unprecedented insight into the interior structure of neutron stars and probing fundamental properties of matter in a completely unexplored regime (QCD at ultra-high densities and possible exotic states of matter). The excellent sensitivity extending to kilohertz frequencies will also allow us to probe details of the merger and post-merger phase. ET will operate together with a new innovative generation of electromagnetic observatories covering the band from radio to gamma rays (such as the Square Kilometer Array, the Vera Rubin Observatory, E-ELT, Athena, CTA).</p> <p><img title="ET-Universe" src="/images/ET-Universe.png" alt="ET-Universe" width="500" height="227" /></p> <p>With a successful ESFRI proposal, the project will enter its preparatory phase, which foresees the beginning of construction in 2026 with the goal to start observations in 2035. Two candidate sites are under investigation: one in Sardinia and one in the Euregio Meuse-Rhine. Site-characterization studies are under way towards a site selection, which is expected for 2024. The evaluation of the sites must consider the feasibility of the construction and predict the impact of the local environment on the detector sensitivity and operation. The gravitational-wave community in the US is currently working on its own third-generation detector concept Cosmic Explorer (CE) towards a future global detector network with the Einstein Telescope.</p> </div> </div> </div> </div> </main> </div> <div class="grid-child container-sidebar-right"> <div class="sidebar-right card "> <h3 class="card-header ">News</h3> <div class="card-body"> <div class="mod-articlesnews newsflash"> <div class="mod-articlesnews__item" itemscope itemtype="https://schema.org/Article"> <p><strong><span dir="ltr" role="presentation">The Einstein Telescope Collaboration will gather for </span></strong><span dir="ltr" role="presentation"><strong>its annual meeting</strong> in Warsaw, Poland, from November 12 to 15, bringing together </span><span dir="ltr" role="presentation">the scienti</span><span class="markedContent"><span dir="ltr" role="presentation">fi</span></span><span dir="ltr" role="presentation">c community from across Europe and the world. The Einstein Telescope </span><span dir="ltr" role="presentation">(ET) represents an ambitious new chapter in gravitational wave astronomy, aspiring </span><span dir="ltr" role="presentation">to become a leading global observatory that will probe the universe’s most profound </span><span dir="ltr" role="presentation">mysteries with unprecedented precision. The local organizers of the Annual Meeting are University of Warsaw in cooperation with the Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences.</span></p> <p>In addition to the main meeting from November 12-14 (Tuesday - Thursday), several satellite meetings are planned for November 15 (Friday):</p> <ul> <li>ET-PP WP2/WP3 Joint Workshop</li> <li>Materials for Advanced Detectors 2024 (MAD24)</li> <li>Laser Noise Requirements for ET</li> <li>SPB</li> </ul> <p><span dir="ltr" role="presentation">Indico page: <a href="https://indico.ego-gw.it/event/764/overview">https://indico.ego-gw.it/event/764/overview</a> </span></p> </div> <div class="mod-articlesnews__item" itemscope itemtype="https://schema.org/Article"> <p><strong>Krzysztof (Chris) Belczynski</strong> pioneered the study of massive black hole formation from the collapse of metal-poor progenitors, several years before the advanced detectors' era. He demonstrated that binary population synthesis is the necessary starting point to understand the (astro)physics of binary compact objects, unraveling the importance of stellar winds, mass transfer, and common envelope. Thanks to his work, we understand why LIGO and Virgo have observed many more binary black holes than neutron star mergers. For many years to come, his models will be a cornerstone for the science case of the Einstein telescope, as well as for the other implications of massive binary star evolution across cosmic time. His volcanic, unconventional, and provocative personality will be sorely missed.</p> <p> </p> <p> </p> </div> <div class="mod-articlesnews__item" itemscope itemtype="https://schema.org/Article"> <p><strong>The 2nd Einstein Telescope Annual Meeting</strong> (Nov, 14, 2023 - Nov, 16, 2023) will be the opportunity to discuss key points of the ET collaboration and of the ET design.</p> <p>The meeting is hosted by the “Gravitational waves” group of the Astroparticles, Astrophysics and Cosmology (A2C) department of the Irène Joliot-Curie Laboratoire des deux infinis (IJCLab). It will take place in the IJCLab Lehmann auditorium (building 200) in the campus of the Paris-Saclay University. Open to all ET collaboration members, it will start on Tuesday morning November 14th and end on Thursday November 16th at lunch time. In-person and remote registrations are possible.</p> <p>Indico page: <a href="https://indico.ijclab.in2p3.fr/event/9686">https://indico.ijclab.in2p3.fr/event/9686</a> </p> </div> <div class="mod-articlesnews__item" itemscope itemtype="https://schema.org/Article"> <p><strong>The XIII symposium of the Einstein Telescope</strong> (ET) will be held in Cagliari, at the <a href="https://www.thotel.it/en/home.html">THotel</a> from May 8th to May 12th 2023. </p> <p>The Symposium is organized in parallel sessions, hosting workshops managed by the ET specific boards (EIB, ISB, OSB and SPB), and a plenary sessions to have a global view of all the activities on going. </p> <p>Along the week several lectures on the physics of ET will be organized with the support of the OSB for PhD students and young researchers.</p> <p>All the details are available in the Indico page of the event:<br /><a href="https://indico.ego-gw.it/event/562/">https://indico.ego-gw.it/event/562/</a> </p> </div> <div class="mod-articlesnews__item" itemscope itemtype="https://schema.org/Article"> <p><strong>The second Site Preparation Board (SPB) workshop</strong> will take place from23-26 January 2023, Maastricht (NL). This will be the occasion to discuss and get updates on the various activities taking place at the sites aspiring to possibly host the future Einstein Telescope (Sardegna in Italy, EMR partially in Belgium, Germany & The Netherlands and possibly Lausitz in Germany). In particular (hydro)geology aspects, noise environment, legal/permitting affairs, bidbook organization, schedules, excavation costs, local funding and future plans, etc. will be discussed. Apart from plenary presentations, lots of time will be reserved for discussions. </p> <p>The <strong>venue</strong> of the workshop is Thiessen Wineries, Maastricht, Grote Gracht 18, 6211SW, Maastricht, The Netherlands. See: <a href="https://thiessen.nl/">https://thiessen.nl/</a>. A maximum of 50 participants can be hosted in person. A video (Zoom) link will be provided to allow remote attendance.</p> <p>Indico page here: <a href="https://indico.ego-gw.it/event/525/">https://indico.ego-gw.it/event/525/</a> </p> </div> </div> </div> </div> </div> </div> </body> </html>