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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">     <html xmlns="http://www.w3.org/1999/xhtml" lang="fr" xml:lang="fr" xmlns:og="http://ogp.me/ns#" xmlns:fb="http://ogp.me/ns/fb#"> <head> <title>Energy deposition studies for the Upgrade II of LHCb at the CERN Large Hadron Collider - CERN Document Server</title> <link href='https://framework.web.cern.ch/framework/2.0/fonts/PTSansWeb/PTSansWeb.css' rel='stylesheet' type='text/css' /> <link rel="stylesheet" href="https://cds.cern.ch/img/invenio.css?v=20141127" type="text/css" /> <link rel="stylesheet" href="https://cds.cern.ch/img/cern_theme/css/cern_theme.css?v=20141127" type="text/css" /> <link rel="stylesheet"href="/css/font-awesome.min.css"> <meta http-equiv="X-UA-Compatible" content="IE=Edge"/> <link rel="stylesheet" href="https://cds.cern.ch/img/cern_toolbar/css/toolbar.css" type="text/css" />    <link rel="canonical" href="https://cds.cern.ch/record/2875966" /> <link rel="alternate" hreflang="el" href="https://cds.cern.ch/record/2875966?ln=el" /> <link rel="alternate" hreflang="fr" href="https://cds.cern.ch/record/2875966?ln=fr" /> <link rel="alternate" hreflang="bg" href="https://cds.cern.ch/record/2875966?ln=bg" /> <link rel="alternate" hreflang="zh-TW" href="https://cds.cern.ch/record/2875966?ln=zh_TW" /> <link rel="alternate" hreflang="pt" href="https://cds.cern.ch/record/2875966?ln=pt" /> <link rel="alternate" hreflang="no" href="https://cds.cern.ch/record/2875966?ln=no" /> <link rel="alternate" hreflang="hr" href="https://cds.cern.ch/record/2875966?ln=hr" /> <link rel="alternate" hreflang="ca" href="https://cds.cern.ch/record/2875966?ln=ca" /> <link rel="alternate" hreflang="de" href="https://cds.cern.ch/record/2875966?ln=de" /> <link rel="alternate" hreflang="it" href="https://cds.cern.ch/record/2875966?ln=it" /> <link rel="alternate" hreflang="zh-CN" href="https://cds.cern.ch/record/2875966?ln=zh_CN" /> <link rel="alternate" hreflang="sv" href="https://cds.cern.ch/record/2875966?ln=sv" /> <link rel="alternate" hreflang="sk" href="https://cds.cern.ch/record/2875966?ln=sk" /> <link rel="alternate" hreflang="en" href="https://cds.cern.ch/record/2875966?ln=en" /> <link rel="alternate" hreflang="pl" href="https://cds.cern.ch/record/2875966?ln=pl" /> <link rel="alternate" hreflang="ru" href="https://cds.cern.ch/record/2875966?ln=ru" /> <link rel="alternate" hreflang="ka" href="https://cds.cern.ch/record/2875966?ln=ka" /> <link rel="alternate" hreflang="ja" href="https://cds.cern.ch/record/2875966?ln=ja" /> <link rel="alternate" hreflang="es" href="https://cds.cern.ch/record/2875966?ln=es" /> <link rel="alternate" type="application/rss+xml" title="CERN Document Server RSS" href="/rss?ln=fr" /> <link rel="search" type="application/opensearchdescription+xml" href="https://cds.cern.ch/opensearchdescription" title="CERN Document Server" /> <link rel="unapi-server" type="application/xml" title="unAPI" href="https://cds.cern.ch/unapi" /> <link rel="apple-touch-icon" href="/apple-touch-icon.png"/> <link rel="apple-touch-icon-precomposed" href="/apple-touch-icon-precomposed.png"/> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta http-equiv="Content-Language" content="fr" /> <meta name="description" content="The Upgrade II of the Large Hadron Collider beauty (LHCb) experiment is proposed to be installed during the CERN Long Shutdown 4, aiming to operate LHCb at <math display="inline"><mrow><mn>1.5</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mn>34</mn></mrow></msup><mtext> </mtext><mtext> </mtext><msup><mrow><mi>cm</mi></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup><mtext> </mtext><msup><mrow><mi mathvariant="normal">s</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math> that is 75 times its design luminosity [1] and reaching an integrated luminosity of about <math display="inline"><mrow><mn>400</mn><mtext> </mtext><mtext> </mtext><msup><mi>fb</mi><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math> by the end of the High Luminosity LHC era. This increase of the data sample at LHCb is an unprecedented opportunity for heavy flavor physics measurements. A first upgrade of LHCb (Upgrade I), completed in 2022, has already implemented important changes of the LHCb detector and, for the Upgrade II, further detector improvements of the tracking system, the particle identification system and the online and trigger infrastructure are being considered. Such a luminosity increase will have an impact not only on the LHCb detector but also on the LHC magnets, cryogenics, and electronic equipment placed in the insertion region 8. In fact, the LHCb experiment was conceived to work at a much lower luminosity than ATLAS and CMS, implying minor requirements for protection of the LHC elements from the collision debris, and therefore, a different layout around the interaction point. The Upgrade I has already implied the installation of an absorber for the neutral particle debris (TANB). However, the luminosity target proposed for this second upgrade requires to review the layout of the entire insertion region in order to ensure safe operation of the LHC magnets and to mitigate the risk of failure of the electronic devices. The objective of this paper is to provide an overview of the implications of the Upgrade II of LHCb in the experimental cavern and in the tunnel with a focus on the LHCb detector, electronic devices, and accelerator magnets. This proves that the Upgrade II luminosity goal can be sustained with the implementation of protection systems for magnets and electronics. The electronics placed in the experimental areas and in the cavern needs to be protected to mitigate a single event effect risk, which may imply recurring downtime of the LHC. On the other hand, protection for the first quadrupole of the final focus triplet and for the separation dipole are needed to prevent their quench and to reach the desired lifetime. Moreover, the normal-conducting compensators require the installation of shielding to limit their head coil degradation. The Upgrade II of the LHCb experiment is proposed to be installed during the CERN Long Shutdown 4, aiming to operate LHCb at 1.5x$10^{34}cm^{-2}s^{-1}$ that is 75 times its design luminosity and reaching an integrated luminosity of about $400 fb^{-1}$ by the end of the High Luminosity LHC era. This increase of the data sample at LHCb is an unprecedented opportunity for heavy flavour physics measurements. A first upgrade of LHCb, completed in 2022, has already implemented important changes of the LHCb detector and, for the Upgrade II, further detector improvements are being considered. Such a luminosity increase will have an impact not only on the LHCb detector but also on the LHC magnets, cryogenics and electronic equipment placed in the IR8. In fact, the LHCb experiment was conceived to work at a much lower luminosity than ATLAS and CMS, implying minor requirements for protection of the LHC elements from the collision debris and therefore a different layout around the interaction point. The luminosity target proposed for the Upgrade II requires to review the layout of the entire insertion region in order to ensure safe operation of the LHC magnets and to mitigate the risk of failure of the electronic devices. The objective of this paper is to provide an overview of the implications of the Upgrade II of LHCb in the experimental cavern and in the tunnel with a focus on the LHCb detector, electronic devices and accelerator magnets. Ciccotelli, Alessia; Appleby, Robert B.; Cerutti, Francesco; Buffet, Kevin; Butin, Francois; Corti, Gloria; Esposito, Luigi Salvatore; Garcia Alia, Ruben; Karacson, Matthias; Lerner, Giuseppe; Wehrle, Maud; Prelipcean, Daniel" /> <meta name="keywords" content="CERN Document Server, WebSearch, LHCb Preprints" /> <script type="text/javascript" src="https://cds.cern.ch/js/jquery.min.js"></script>  <link rel="stylesheet" href="https://cds.cern.ch/img/webnews.css" type="text/css" />  <script type="text/javascript" src="https://cds.cern.ch/js/webnews.js?v=20131009"></script> <meta property="fb:app_id" content="137353533001720"/> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ tex2jax: {inlineMath: [['$','$']], processEscapes: true}, showProcessingMessages: false, messageStyle: "none" }); </script> <script src="/MathJax/MathJax.js?config=TeX-AMS_CHTML" type="text/javascript"> </script>  <meta content="APS : Energy deposition studies for the Upgrade II of LHCb at the CERN Large Hadron Collider" name="citation_title" /> <meta content="Ciccotelli, Alessia" name="citation_author" /> <meta content="Lerner, Giuseppe" name="citation_author" /> <meta content="Cerutti, Francesco" name="citation_author" /> <meta content="Corti, Gloria" name="citation_author" /> <meta content="Karacson, Matthias" name="citation_author" /> <meta content="Appleby, Robert B." name="citation_author" /> <meta content="Esposito, Luigi Salvatore" name="citation_author" /> <meta content="Garcia Alia, Ruben" name="citation_author" /> <meta content="Prelipcean, Daniel" name="citation_author" /> <meta content="Buffet, Kevin" name="citation_author" /> <meta content="Butin, Francois" name="citation_author" /> <meta content="Wehrle, Maud" name="citation_author" /> <meta content="10.1103/PhysRevAccelBeams.27.061003" name="citation_doi" /> <meta content="Phys. 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content="https://cds.cern.ch/record/2875966/files/Lumi_UpgradeII_TDR.png" /> <meta property="og:image" content="https://cds.cern.ch/record/2875966/files/Dose_right_triplet_D101.png" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2875966/files/Dose_right_triplet_D101.png" /> <meta content="CERN Document Server" property="og:site_name" /> <meta content="APS" property="og:description" /> <meta content="arXiv" property="og:description" /> <meta content="The Upgrade II of the LHCb experiment is proposed to be installed during the CERN Long Shutdown 4, aiming to operate LHCb at 1.5x$10^{34}cm^{-2}s^{-1}$ that is 75 times its design luminosity and reaching an integrated luminosity of about $400 fb^{-1}$ by the end of the High Luminosity LHC era. This increase of the data sample at LHCb is an unprecedented opportunity for heavy flavour physics measurements. A first upgrade of LHCb, completed in 2022, has already implemented important changes of the LHCb detector and, for the Upgrade II, further detector improvements are being considered. Such a luminosity increase will have an impact not only on the LHCb detector but also on the LHC magnets, cryogenics and electronic equipment placed in the IR8. In fact, the LHCb experiment was conceived to work at a much lower luminosity than ATLAS and CMS, implying minor requirements for protection of the LHC elements from the collision debris and therefore a different layout around the interaction point. The luminosity target proposed for the Upgrade II requires to review the layout of the entire insertion region in order to ensure safe operation of the LHC magnets and to mitigate the risk of failure of the electronic devices. The objective of this paper is to provide an overview of the implications of the Upgrade II of LHCb in the experimental cavern and in the tunnel with a focus on the LHCb detector, electronic devices and accelerator magnets." property="og:description" /> <meta content="The Upgrade II of the Large Hadron Collider beauty (LHCb) experiment is proposed to be installed during the CERN Long Shutdown 4, aiming to operate LHCb at 1.5×1034 cm−2 s−1 that is 75 times its design luminosity [1] and reaching an integrated luminosity of about 400 fb−1 by the end of the High Luminosity LHC era. This increase of the data sample at LHCb is an unprecedented opportunity for heavy flavor physics measurements. A first upgrade of LHCb (Upgrade I), completed in 2022, has already implemented important changes of the LHCb detector and, for the Upgrade II, further detector improvements of the tracking system, the particle identification system and the online and trigger infrastructure are being considered. Such a luminosity increase will have an impact not only on the LHCb detector but also on the LHC magnets, cryogenics, and electronic equipment placed in the insertion region 8. In fact, the LHCb experiment was conceived to work at a much lower luminosity than ATLAS and CMS, implying minor requirements for protection of the LHC elements from the collision debris, and therefore, a different layout around the interaction point. The Upgrade I has already implied the installation of an absorber for the neutral particle debris (TANB). However, the luminosity target proposed for this second upgrade requires to review the layout of the entire insertion region in order to ensure safe operation of the LHC magnets and to mitigate the risk of failure of the electronic devices. The objective of this paper is to provide an overview of the implications of the Upgrade II of LHCb in the experimental cavern and in the tunnel with a focus on the LHCb detector, electronic devices, and accelerator magnets. This proves that the Upgrade II luminosity goal can be sustained with the implementation of protection systems for magnets and electronics. The electronics placed in the experimental areas and in the cavern needs to be protected to mitigate a single event effect risk, which may imply recurring downtime of the LHC. On the other hand, protection for the first quadrupole of the final focus triplet and for the separation dipole are needed to prevent their quench and to reach the desired lifetime. Moreover, the normal-conducting compensators require the installation of shielding to limit their head coil degradation." property="og:description" />  <meta content="summary" name="twitter:card" /> <style></style> </head> <body class="LHCb32Preprints search" lang="fr">  <div id="cern-toolbar"> <h1><a href="http://cern.ch" title="CERN">CERN <span>Accélérateur de science</span></a></h1> <ul> <li class="cern-accountlinks"><a class="cern-account" href="https://cds.cern.ch/youraccount/login?ln=fr&referer=https%3A//cds.cern.ch/record/2875966%3Fln%3Dfr" title="Sign in to your CERN account">Connexion</a></li> <li><a class="cern-directory" href="http://cern.ch/directory" title="Search CERN resources and browse the directory">Liens utiles</a></li> </ul> </div>   <div role="banner" class="clearfix" id="header"> <div class="header-inner inner"> <hgroup class="clearfix"> <h2 id="site-name"> <a rel="home" title="Home" href="/"><span>CERN Document Server</span></a> </h2> <h3 id="site-slogan">Articles, rapports et multimédia de la physique des hautes énergies</h3> </hgroup> <div role="navigation" id="main-navigation" class="cdsmenu"> <h2 class="element-invisible">Main menu</h2><ul class="links inline clearfix"> <li class="menu-386 first active-trail"><a class="active-trail" href="https://cds.cern.ch/?ln=fr">Recherche</a></li> <li class="menu-444 "><a class="" title="" href="https://cds.cern.ch/submit?ln=fr">Soumettre</a></li> <li class="menu-426 "><a class="" href="https://cds.cern.ch/help/?ln=fr">Aide</a></li> <li class="leaf hassubcdsmenu"> <a hreflang="en" class="header" href="https://cds.cern.ch/youraccount/display?ln=fr">Personnaliser</a> <ul class="subsubcdsmenu"><li><a href="https://cds.cern.ch/youralerts/list?ln=fr">Vos alertes</a></li><li><a href="https://cds.cern.ch/yourbaskets/display?ln=fr">Vos paniers</a></li><li><a href="https://cds.cern.ch/yourcomments?ln=fr">Vos commentaires</a></li><li><a href="https://cds.cern.ch/youralerts/display?ln=fr">Vos recherches</a></li></ul></li> </ul> </div> </div> </div>  <table class="navtrailbox"> <tr> <td class="navtrailboxbody"> <a href="/?ln=fr" class="navtrail">Accueil</a> > <a href="/collection/LHCb%20Collection?ln=fr" class="navtrail">LHCb Collection</a> > <a href="/collection/LHCb%20Preprints?ln=fr" class="navtrail">LHCb Preprints</a> > Energy deposition studies for the Upgrade II of LHCb at the CERN Large Hadron Collider </td> </tr> </table> </div> <div class="pagebody"><div class="pagebodystripemiddle"> <div class="detailedrecordbox"> <div class="detailedrecordtabs"> <div> <ul class="detailedrecordtabs"><li class="on first"><a href="/record/2875966/?ln=fr">Informations </a></li><li class=""><a href="/record/2875966/references?ln=fr">Références </a></li><li class=""><a href="/record/2875966/comments?ln=fr">Discussion (0) </a></li><li class=""><a href="/record/2875966/files?ln=fr">Fichiers </a></li></ul> <div id="tabsSpacer" style="clear:both;height:0px"> </div></div> </div> <div class="detailedrecordboxcontent"> <div class="top-left-folded"></div> <div class="top-right-folded"></div> <div class="inside">  <abbr class="unapi-id" title="2875966"></abbr> <style type="text/css">  </style> <table class="formatRecordTableFullWidth" > <tr> <td class="formatRecordHeader" style="background-image: url('https://cds.cern.ch/img/journals.jpg');" colspan="2">  Article </td> </tr> <script type="text/javascript"> $( document ).ready(function() { $('.showAuthor').on('click', function() { var author = '<p>' + $(this).data('name') + '</p>'; var affiliation = $(this).data('affiliation') + '</br>'; var contribution = $(this).data('contribution') + '</br>'; $.magnificPopup.open({ items: { src: '<div id="ovelary-mathjax" class="overlay-white oc-content overlay-white-500">' + author + affiliation + contribution + '</div>', type: 'inline' }, callbacks: { open: function() { var div = document.getElementById("overlay-mathjax") MathJax.Hub.Queue(["Typeset", MathJax.Hub, div]); }, } }) }) }); </script> <tr><td class="formatRecordLabel"> Report number </td><td style="padding-left:5px;"><a href="http://arxiv.org/abs/arXiv:2310.08281">arXiv:2310.08281</a></td></tr> <tr><td class="formatRecordLabel"> Title </td><td style="padding-left:5px;"><b>Energy deposition studies for the Upgrade II of LHCb at the CERN Large Hadron Collider</b></td></tr> <tr><td class="formatRecordLabel"><span style="white-space:nowrap;"> Author(s) </span> </td><td style="padding-left:5px;"> <script type="text/javascript"> function toggle_authors_visibility(){ var more = document.getElementById('more'); var link = document.getElementById('link'); var extension = document.getElementById('extension'); if (more.style.display=='none'){ more.style.display = ''; extension.style.display = 'none'; link.innerHTML = "Masquer" } else { more.style.display = 'none'; extension.style.display = ''; link.innerHTML = "Afficher les 12 auteurs" } link.style.color = "rgb(204,0,0);" } function set_up(){ var extension = document.getElementById('extension'); extension.innerHTML = ""; toggle_authors_visibility(); } </script> <a name="show_hide" /><a href="https://cds.cern.ch/search?f=author&p=Ciccotelli%2C%20Alessia&ln=fr">Ciccotelli, Alessia</a> (CERN ; U. Manchester (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; <a href="https://cds.cern.ch/search?f=author&p=Appleby%2C%20Robert%20B.&ln=fr">Appleby, Robert B.</a> (U. Manchester (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; <a href="https://cds.cern.ch/search?f=author&p=Cerutti%2C%20Francesco&ln=fr">Cerutti, Francesco</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Buffet%2C%20Kevin&ln=fr">Buffet, Kevin</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Butin%2C%20Francois&ln=fr">Butin, Francois</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Corti%2C%20Gloria&ln=fr">Corti, Gloria</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Esposito%2C%20Luigi%20Salvatore&ln=fr">Esposito, Luigi Salvatore</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Garcia%20Alia%2C%20Ruben&ln=fr">Garcia Alia, Ruben</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Karacson%2C%20Matthias&ln=fr">Karacson, Matthias</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Lerner%2C%20Giuseppe&ln=fr">Lerner, Giuseppe</a> (CERN)<span id="more" style=""> ; <a href="https://cds.cern.ch/search?f=author&p=Wehrle%2C%20Maud&ln=fr">Wehrle, Maud</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Prelipcean%2C%20Daniel&ln=fr">Prelipcean, Daniel</a> (CERN ; Munich, Tech. U.)</span> <span id="extension"></span> <small><i><a id="link" href="#" onclick="toggle_authors_visibility()" style="color:rgb(204,0,0);"></a></i></small><script type="text/javascript">set_up()</script></td></tr> <tr><td class="formatRecordLabel"> Publication </td><td style="padding-left:5px;">2024-06-01</td></tr> <tr><td class="formatRecordLabel"> Imprint </td><td style="padding-left:5px;">2023-10-12</td></tr> <tr><td class="formatRecordLabel"> Number of pages </td><td style="padding-left:5px;">17</td></tr> <tr><td class="formatRecordLabel"> In: </td><td style="padding-left:5px;"><a href="http://dx.doi.org/10.1103/PhysRevAccelBeams.27.061003"><i>Phys. Rev. Accel. Beams</i> 27 (2024) 061003</a> </a></td></tr> <tr><td class="formatRecordLabel"> DOI </td><td style="padding-left:5px;"><a href="http://dx.doi.org/10.1103/PhysRevAccelBeams.27.061003" title="DOI" target="_blank">10.1103/PhysRevAccelBeams.27.061003</a> (publication) <tr><td class="formatRecordLabel"> Subject category </td><td style="padding-left:5px;">physics.acc-ph ; Accelerators and Storage Rings ; hep-ex ; Particle Physics - Experiment</td></tr> <tr><td class="formatRecordLabel"> Accelerator/Facility, Experiment </td><td style="padding-left:5px;"><a href="https://cds.cern.ch/search?p=CERN%20LHC&f=693__a">CERN LHC</a> ; <a href="https://cds.cern.ch/search?p=LHCb&f=693__e">LHCb</a></td></tr> <tr><td class="formatRecordLabel"> Abstract </td><td style="padding-left:5px;">The Upgrade II of the LHCb experiment is proposed to be installed during the CERN Long Shutdown 4, aiming to operate LHCb at 1.5x$10^{34}cm^{-2}s^{-1}$ that is 75 times its design luminosity and reaching an integrated luminosity of about $400 fb^{-1}$ by the end of the High Luminosity LHC era. This increase of the data sample at LHCb is an unprecedented opportunity for heavy flavour physics measurements. A first upgrade of LHCb, completed in 2022, has already implemented important changes of the LHCb detector and, for the Upgrade II, further detector improvements are being considered. Such a luminosity increase will have an impact not only on the LHCb detector but also on the LHC magnets, cryogenics and electronic equipment placed in the IR8. In fact, the LHCb experiment was conceived to work at a much lower luminosity than ATLAS and CMS, implying minor requirements for protection of the LHC elements from the collision debris and therefore a different layout around the interaction point. The luminosity target proposed for the Upgrade II requires to review the layout of the entire insertion region in order to ensure safe operation of the LHC magnets and to mitigate the risk of failure of the electronic devices. The objective of this paper is to provide an overview of the implications of the Upgrade II of LHCb in the experimental cavern and in the tunnel with a focus on the LHCb detector, electronic devices and accelerator magnets.</td></tr> <tr><td class="formatRecordLabel"> Copyright/License </td><td style="padding-left:5px;">preprint: (License: <a href="http://arxiv.org/licenses/nonexclusive-distrib/1.0/">arXiv nonexclusive-distrib 1.0</a>)<br/>publication: © 2024 authors (License: <a href="https://creativecommons.org/licenses/by/4.0/">CC BY 4.0</a>)</td></tr> </table> <br /><div style="max-width:1024px;margin:auto"><div style="overflow-x:auto;display:inline;width:100%;"><a href="/record/2875966/plots#0"><img style="vertical-align:middle;" src="https://cds.cern.ch/record/2875966/files/Lumi_UpgradeII_my.png" title=" Luminosity performances in IR8 with and without the Upgrade II of LHCb~\cite{LHCbCollaboration:2776420,CERN_LHC_schedule,triplet}." width="200px"/></a> <a href="/record/2875966/plots#1"><img style="vertical-align:middle;" src="https://cds.cern.ch/record/2875966/files/Detector_UpgradeII.png" title=" Schematic side-view of the Upgrade II detector extracted from the Technical Design Report (TDR) published by the LHCb Collaboration \cite{LHCbCollaboration:2776420}." width="200px"/></a> <a href="/record/2875966/plots#2"><img style="vertical-align:middle;" src="https://cds.cern.ch/record/2875966/files/TI8_IR8_lhcb_wall_4.png" title=" 3D FLUKA geometry of UX85 and US85, including the LHCb detector and the shielding wall." width="200px"/></a> <a href='/record/2875966/plots'>Show more plots</a></div></div><br /> <br/>Corresponding record in: <a href="http://inspirehep.net/record/2710017">Inspire</a> <small> </small> <br/> <br/><br/><div align="right"><div style="padding-bottom:2px;padding-top:30px;"><span class="moreinfo" style="margin-right:10px;"> <a href="" class="moreinfo">Retour à la recherche</a> </span></div></div> <div class="bottom-left-folded"><div class="recordlastmodifiedbox" style="position:relative;margin-left:1px"> Notice créée le 2023-10-18, modifiée le 2024-07-03</div></div> <div class="bottom-right-folded" style="text-align:right;padding-bottom:2px;"> <span class="moreinfo" style="margin-right:10px;"><a href="/search?ln=fr&p=recid%3A2875966&rm=wrd" class="moreinfo">Notices similaires</a></span></div> </div> </div> </div> <br/> <br /> <div class="detailedrecordminipanel"> <div class="top-left"></div><div class="top-right"></div> <div class="inside"> <div id="detailedrecordminipanelfile" style="width:33%;float:left;text-align:center;margin-top:0"> <div><small class="detailedRecordActions">Fichiers:</small> <br /><em>2310.08281</em> - <a href="/record/2875966/files/2310.08281.pdf"><img style="border:none" src="/img/file-icon-text-12x16.gif" alt="Télécharger le document"/>PDF</a><br /><em>Publication</em> - <a href="/record/2875966/files/Publication.pdf"><img style="border:none" src="/img/file-icon-text-12x16.gif" alt="Télécharger le document"/>PDF</a><br /></div> </div> <div id="detailedrecordminipanelreview" style="width:30%;float:left;text-align:center"> </div> <div id="detailedrecordminipanelactions" style="width:36%;float:right;text-align:right;"> <ul class="detailedrecordactions"> <li><a href="/yourbaskets/add?ln=fr&recid=2875966">Ajouter au panier personnel</a></li> <li>Exporter vers <a style="text-decoration:underline;font-weight:normal" href="/record/2875966/export/hx?ln=fr">BibTeX</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2875966/export/hm?ln=fr">MARC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2875966/export/xm?ln=fr">MARCXML</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2875966/export/xd?ln=fr">DC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2875966/export/xe?ln=fr">EndNote</a>,  <a style="text-decoration:underline;font-weight:normal" href="/record/2875966/export/xn?ln=fr">NLM</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2875966/export/xw?ln=fr">RefWorks</a> </li> </ul> <div style='padding-left: 13px;'>  <div id="bookmark"></div> <div id="bookmark_sciencewise"></div> <style type="text/css"> #bookmark_sciencewise, #bookmark {float: left;} #bookmark_sciencewise li {padding: 2px; width: 25px;} #bookmark_sciencewise ul, #bookmark ul {list-style-image: none;} </style> <script type="text/javascript" src="/js/jquery.bookmark.min.js"></script> <style type="text/css">@import "/css/jquery.bookmark.css";</style> <script type="text/javascript">// <![CDATA[ $.bookmark.addSite('sciencewise', 'ScienceWise.info', 'https://cds.cern.ch/img/sciencewise.png', 'en', 'bookmark', 'http://sciencewise.info/bookmarks/2310.0828/add'); $('#bookmark_sciencewise').bookmark({sites: ['sciencewise']}); $('#bookmark').bookmark({ sites: ['facebook', 'twitter', 'linkedin', 'google_plusone'], icons: '/img/bookmarks.png', url: 'https://cds.cern.ch/record/2875966', addEmail: true, title: "Energy deposition studies for the Upgrade II of LHCb at the CERN Large Hadron Collider", description: "The Upgrade II of the Large Hadron Collider beauty (LHCb) experiment is proposed to be installed during the CERN Long Shutdown 4, aiming to operate LHCb at <math display=\"inline\"><mrow><mn>1.5</mn><mo>\u00d7</mo><msup><mrow><mn>10</mn></mrow><mrow><mn>34</mn></mrow></msup><mtext>\u2009</mtext><mtext>\u2009</mtext><msup><mrow><mi>cm</mi></mrow><mrow><mo>\u2212</mo><mn>2</mn></mrow></msup><mtext>\u2009</mtext><msup><mrow><mi mathvariant=\"normal\">s</mi></mrow><mrow><mo>\u2212</mo><mn>1</mn></mrow></msup></mrow></math> that is 75 times its design luminosity [1] and reaching an integrated luminosity of about <math display=\"inline\"><mrow><mn>400</mn><mtext>\u2009</mtext><mtext>\u2009</mtext><msup><mi>fb</mi><mrow><mo>\u2212</mo><mn>1</mn></mrow></msup></mrow></math> by the end of the High Luminosity LHC era. This increase of the data sample at LHCb is an unprecedented opportunity for heavy flavor physics measurements. A first upgrade of LHCb (Upgrade I), completed in 2022, has already implemented important changes of the LHCb detector and, for the Upgrade II, further detector improvements of the tracking system, the particle identification system and the online and trigger infrastructure are being considered. Such a luminosity increase will have an impact not only on the LHCb detector but also on the LHC magnets, cryogenics, and electronic equipment placed in the insertion region 8. In fact, the LHCb experiment was conceived to work at a much lower luminosity than ATLAS and CMS, implying minor requirements for protection of the LHC elements from the collision debris, and therefore, a different layout around the interaction point. The Upgrade I has already implied the installation of an absorber for the neutral particle debris (TANB). However, the luminosity target proposed for this second upgrade requires to review the layout of the entire insertion region in order to ensure safe operation of the LHC magnets and to mitigate the risk of failure of the electronic devices. The objective of this paper is to provide an overview of the implications of the Upgrade II of LHCb in the experimental cavern and in the tunnel with a focus on the LHCb detector, electronic devices, and accelerator magnets. This proves that the Upgrade II luminosity goal can be sustained with the implementation of protection systems for magnets and electronics. The electronics placed in the experimental areas and in the cavern needs to be protected to mitigate a single event effect risk, which may imply recurring downtime of the LHC. On the other hand, protection for the first quadrupole of the final focus triplet and for the separation dipole are needed to prevent their quench and to reach the desired lifetime. Moreover, the normal-conducting compensators require the installation of shielding to limit their head coil degradation." }); // ]]> </script>  </div> </div> <div style="clear:both;margin-bottom: 0;"></div> </div> <div class="bottom-left"></div><div class="bottom-right"></div> </div> </div></div> <footer id="footer" class="pagefooter clearfix">  <div class="pagefooterstripeleft"> CERN Document Server :: <a class="footer" href="https://cds.cern.ch/?ln=fr">Recherche</a> :: <a class="footer" href="https://cds.cern.ch/submit?ln=fr">Soumettre</a> :: <a class="footer" href="https://cds.cern.ch/youraccount/display?ln=fr">Personnaliser</a> :: <a class="footer" href="https://cds.cern.ch/help/?ln=fr">Aide</a> :: <a class="footer" href="https://cern.service-now.com/service-portal?id=privacy_policy&se=CDS-Service" target="_blank">Privacy Notice</a> <br /> Powered by <a class="footer" href="http://invenio-software.org/">Invenio</a> <br /> Maintenu par <a class="footer" href="https://cern.service-now.com/service-portal?id=service_element&name=CDS-Service">CDS Service</a> - Need help? 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