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Pour ce faire, nous utilisons les instruments scientifiques les plus grands et les plus complexes du monde.</p> <p class="cern-btn"><a href="/fr/about">En savoir plus</a></p> </div> </div> </div> <div class="col-xs-0 col-sm-0 col-md-8 col-lg-8 col-item-megamenu"> <div class="row"> <div class="col-xs-12 col-sm-12 col-md-4 col-lg-4 col-item-megamenu"> <ul class="cern-submenu"> <li> <p class="h2 cernmenu-level-0"> <a href="/fr/about/who-we-are" data-drupal-link-system-path="node/5898">Qui sommes-nous ?</a> </p> <ul class=""> <li> <p class=" cernmenu-level-1 cernmenu-level-last "> <a href="/fr/about/who-we-are/our-mission" data-drupal-link-system-path="node/5273">Nos missions</a> </p> </li> <li> <p class=" cernmenu-level-1 cernmenu-level-last "> <a href="/fr/about/who-we-are/our-governance" data-drupal-link-system-path="node/5277">Notre gouvernance</a> </p> </li> <li> <p class=" cernmenu-level-1 cernmenu-level-last "> <a href="/fr/about/who-we-are/our-governance/member-states" 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title="Une artiste suisse sélectionnée pour le programme de résidence artistique Connect"> <span> Une artiste suisse sélectionnée pour le progr... </span> </a> </h3> </div> <div class="preview-card__body"></div> <div class="preview-cards__subtext"> <div class="preview-card__category" style="color:"> At CERN </div> <div class="preview-card__category" style="color:"> News </div> <div class="preview-card__date" style="color:"> <time datetime="2025-01-30T13:00:00Z">30 janvier, 2025</time> </div> </div> </div> </div> </div> </div> <div class="views-row"> <div data-history-node-id="191421" id="preview-card--2" class="component-preview-cards box-pattern news_page" style="background:url('/sites/default/files/styles/large/public/2024-12/202204-064_375.jpg?itok=nP87BzBh') no-repeat center center / cover" data-background="/sites/default/files/styles/large/public/2024-12/202204-064_375.jpg?itok=nP87BzBh" class="component-preview-cards box-pattern news_page"> <a class="box-link" target="" href="/fr/news/press-release/physics/cloud-experiment-resolves-puzzle-new-aerosol-particles-upper-troposphere"></a> <div class="component-preview-cards__veil"></div> <div class="component-preview-cards__box_wrapper"> <div class="component-preview-cards__box"> <div class="preview-card__title"> <h3 class="standard-title"> <a href="/fr/news/press-release/physics/cloud-experiment-resolves-puzzle-new-aerosol-particles-upper-troposphere" hreflang="fr" title="L’expérience CLOUD résout l’énigme de la formation de nouvelles particules d’aérosol dans la troposphère supérieure"> <span> L’expérience CLOUD résout l’énigme de la form... </span> </a> </h3> </div> <div class="preview-card__body"></div> <div class="preview-cards__subtext"> <div class="preview-card__category" style="color:"> Physics </div> <div class="preview-card__category" style="color:"> Press release </div> <div class="preview-card__date" style="color:"> <time datetime="2024-12-04T16:00:10Z">4 décembre, 2024</time> </div> </div> </div> </div> </div> </div> <div class="views-row"> <div data-history-node-id="191397" id="preview-card--3" class="component-preview-cards box-pattern news_page" style="background:url('/sites/default/files/styles/large/public/2024-11/Montclar.jpg?itok=1v3MFmuM') no-repeat center center / cover" data-background="/sites/default/files/styles/large/public/2024-11/Montclar.jpg?itok=1v3MFmuM" class="component-preview-cards box-pattern news_page"> <a class="box-link" target="" href="/fr/news/news/engineering/cern-signs-long-term-solar-power-agreements"></a> <div class="component-preview-cards__veil"></div> <div class="component-preview-cards__box_wrapper"> <div class="component-preview-cards__box"> <div class="preview-card__title"> <h3 class="standard-title"> <a href="/fr/news/news/engineering/cern-signs-long-term-solar-power-agreements" hreflang="fr" title="Le CERN signe des contrats à long terme pour s’approvisionner en énergie solaire"> <span> Le CERN signe des contrats à long terme pour 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<div data-history-node-id="5054" id="preview-card--5" class="component-preview-cards box-pattern news_page" style="background:url('//cds.cern.ch/images/CERN-PHOTO-201809-249-16/file?size=medium') no-repeat center center / cover" data-background="//cds.cern.ch/images/CERN-PHOTO-201809-249-16/file?size=medium" class="component-preview-cards box-pattern news_page"> <a class="box-link" target="" href="/fr/resources/annual-report/cern/annual-reports"></a> <div class="component-preview-cards__veil"></div> <div class="component-preview-cards__box_wrapper"> <div class="component-preview-cards__box"> <div class="component-preview-cards__category-icon-vocabulary" data-icon="^"></div> <div class="preview-card__title"> <h3 class="standard-title"> <a href="/fr/resources/annual-report/cern/annual-reports" hreflang="fr" title="Rapport annuel"> <span> Rapport annuel </span> </a> </h3> </div> <div class="preview-card__body"></div> <div class="preview-cards__subtext"> <div class="preview-card__category" style="color:"> Annual report </div> <div class="preview-card__category" style="color:"> At CERN </div> <div class="preview-card__date" style="color:"> <time datetime="2018-06-20T16:48:31Z">20 juin, 2018</time> </div> </div> </div> </div> </div> </span></div> </div> <div class="views-row"> <div class="views-field views-field-rendered-entity"><span class="field-content"> <div data-history-node-id="5179" id="preview-card--6" class="component-preview-cards box-pattern news_page" style="background:url('/sites/default/files/styles/large/public/2022-09/FAQ-LHC-FR-cover-min.JPG?itok=5liGbOgG') no-repeat center center / cover" data-background="/sites/default/files/styles/large/public/2022-09/FAQ-LHC-FR-cover-min.JPG?itok=5liGbOgG" class="component-preview-cards box-pattern news_page"> <a class="box-link" target="" href="/fr/resources/brochure/knowledge-sharing/lhc-facts-and-figures"></a> <div class="component-preview-cards__veil"></div> <div class="component-preview-cards__box_wrapper"> <div 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Il a été conçu pour explorer un large éventail de domaines de la physique, allant de la recherche du <a href="/fr/science/physics/higgs-boson">boson de Higgs</a> à celle d’<a href="/fr/science/physics/extra-dimensions-gravitons-and-tiny-black-holes">autres dimensions</a>, en passant par la quête des particules qui pourraient constituer la <a href="/fr/science/physics/dark-matter">matière noire</a>. Bien que ses buts scientifiques soient les mêmes que ceux de l’expérience <a href="/fr/science/experiments/atlas">ATLAS</a>, la collaboration CMS a opté pour d’autres solutions techniques et un système magnétique de conception différente.</p> <p>Le détecteur CMS est construit autour d’un énorme aimant solénoïde, qui se présente sous la forme d’une bobine cylindrique supraconductrice générant un champ magnétique de 4 teslas, soit environ 100 000 fois le champ magnétique terrestre. Le champ magnétique créé est confiné par une « culasse » d’acier, qui constitue la pièce la plus lourde de ce détecteur de 14 000 tonnes.</p> <p>Contrairement aux autres détecteurs géants du LHC, dont les éléments ont été construits sous terre, CMS a été construit à la surface, en 15 sections, qui ont ensuite été descendues dans une caverne souterraine située près de Cessy (France), où elles ont été assemblées. Le détecteur dans son ensemble mesure 21 mètres de long, 15 mètres de large et 15 mètres de haut.</p> <p>L’expérience CMS est l’une des plus grandes collaborations scientifiques internationales qui ait jamais existé. Elle compte en effet environ 5 500 physiciens des particules, ingénieurs, techniciens, étudiants et personnes chargées de l’appui représentant 241 universités et instituts de plus de 54 pays (mai 2022). Pour les dernières informations, voir <a href="https://greybook.cern.ch/experiment/detail?id=CMS">ici</a>.</p> <p><strong>Pour en savoir plus :</strong></p> <p><a href="//cms.cern">Site web de CMS</a></p> <p> </p> <script> function PopupCenter(pageURL, title,w,h) { var left = (screen.width/2)-(w/2); var top = (screen.height/2)-(h/2); var targetWin = window.open (pageURL, title, 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width='+w+', height='+h+', top='+top+', left='+left); } </script> <section class="blurb"> <p><a href="javascript:void(0);" onclick="PopupCenter('http://cern.ch/virtual-tours/vtours/CMS/CMS.html', 'myPop1',800,600);"><img alt="CMS" src="//cds.cern.ch/images/CERN-PHOTO-202108-102-11/file?size=large"></a></p> <h1><a href="javascript:void(0);" onclick="PopupCenter('http://cern.ch/virtual-tours/vtours/CMS/CMS.html', 'myPop1',800,600);">Visite virtuelle</a></h1> <p>Faites une visite virtuelle du détecteur 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