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Currently the collimators setup is performed by monitoring beam losses generated by the collimator jaws when approaching the particle beam. This procedure is applied to all LHC collimators (almost one hundred), taking several hours, and needs to be repeated if beam settings change significantly. Furthermore, during the beam-based alignment, the LHC tertiary collimators are potentially exposed to abnormal losses entailing possible damage to their tungsten jaws. To improve the efficiency of the machine operation and better control the particle beam a new advanced design embedding Beam Position Monitors (BPM) into the movable collimator jaws has been developed. This paper describes the mechanical design of various types of future collimators with embedded BPMs. Experimental measurements performed on a simplified functional prototype installed in the CERN SPS showed that, thanks to on-board BPMs, the collimator could be precisely, rapidly, and safely aligned and the beam position accurately measured. Dallocchio, A; Bertarelli, A; Boccard, C; Carra, F; Gasior, M; Gentini, L; Timmins, M A" /> <meta name="keywords" content="CERN Document Server, WebSearch, CERN Document Server" /> <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="LHC Collimators with Embedded Beam Position Monitors: A New Advanced Mechanical Design" name="citation_title" /> <meta content="Dallocchio, A" name="citation_author" /> <meta content="Gasior, M" name="citation_author" /> <meta content="Boccard, C" name="citation_author" /> <meta content="Carra, F" name="citation_author" /> <meta content="Timmins, M A" name="citation_author" /> <meta content="Bertarelli, A" name="citation_author" /> <meta content="Gentini, L" name="citation_author" /> <meta content="2011/11/29" name="citation_publication_date" /> <meta name="citation_online_date" content="2011/11/29"> <meta content="CERN-ATS-2011-228" name="citation_technical_report_number" /> <meta name="citation_pdf_url" content="https://cds.cern.ch/record/1402570/files/CERN-ATS-2011-228.pdf" />  <meta content="LHC Collimators with Embedded Beam Position Monitors: A New Advanced Mechanical Design" property="og:title" /> <meta content="website" property="og:type" /> <meta content="website" property="og:type" /> <meta content="https://cds.cern.ch/record/1402570" property="og:url" /> <meta content="CERN Document Server" property="og:site_name" /> <meta content="The LHC collimation system, ensuring both functions of beam cleaning and machine protection, is potentially submitted to high-energy beam impacts. 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This paper describes the mechanical design of various types of future collimators with embedded BPMs. Experimental measurements performed on a simplified functional prototype installed in the CERN SPS showed that, thanks to on-board BPMs, the collimator could be precisely, rapidly, and safely aligned and the beam position accurately measured." property="og:description" />  <meta content="summary" name="twitter:card" /> <meta content="summary" name="twitter:card" /> <style></style> </head> <body class="CERN32Document32Server 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/1402570%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> > LHC Collimators with Embedded Beam Position Monitors: A New Advanced Mechanical Design </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/1402570/?ln=fr">Informations </a></li><li class=""><a href="/record/1402570/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="1402570"></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;">CERN-ATS-2011-228</td></tr> <tr><td class="formatRecordLabel"> Title </td><td style="padding-left:5px;"><b>LHC Collimators with Embedded Beam Position Monitors: A New Advanced Mechanical Design</b></td></tr> <tr><td class="formatRecordLabel"><span style="white-space:nowrap;"> Author(s) </span> </td><td style="padding-left:5px;"><a href="https://cds.cern.ch/search?f=author&p=Dallocchio%2C%20A&ln=fr">Dallocchio, A</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Bertarelli%2C%20A&ln=fr">Bertarelli, A</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Boccard%2C%20C&ln=fr">Boccard, C</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Carra%2C%20F&ln=fr">Carra, F</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Gasior%2C%20M&ln=fr">Gasior, M</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Gentini%2C%20L&ln=fr">Gentini, L</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Timmins%2C%20M%20A&ln=fr">Timmins, M A</a> (CERN)</td></tr> <tr><td class="formatRecordLabel"> Publication </td><td style="padding-left:5px;">2011</td></tr> <tr><td class="formatRecordLabel"> Imprint </td><td style="padding-left:5px;">29 Nov 2011</td></tr> <tr><td class="formatRecordLabel"> Number of pages </td><td style="padding-left:5px;">4</td></tr> <tr><td class="formatRecordLabel"> In: </td><td style="padding-left:5px;"><a href="https://cds.cern.ch/record/1378144">2nd International Particle Accelerator Conference</a>, San Sebastian, Spain, 4 - 9 Sep 2011, pp.TUPS035</td></tr> <tr><td class="formatRecordLabel"> Subject category </td><td style="padding-left:5px;">Accelerators and Storage Rings</td></tr> <tr><td class="formatRecordLabel"> Abstract </td><td style="padding-left:5px;">The LHC collimation system, ensuring both functions of beam cleaning and machine protection, is potentially submitted to high-energy beam impacts. Currently the collimators setup is performed by monitoring beam losses generated by the collimator jaws when approaching the particle beam. This procedure is applied to all LHC collimators (almost one hundred), taking several hours, and needs to be repeated if beam settings change significantly. Furthermore, during the beam-based alignment, the LHC tertiary collimators are potentially exposed to abnormal losses entailing possible damage to their tungsten jaws. To improve the efficiency of the machine operation and better control the particle beam a new advanced design embedding Beam Position Monitors (BPM) into the movable collimator jaws has been developed. This paper describes the mechanical design of various types of future collimators with embedded BPMs. Experimental measurements performed on a simplified functional prototype installed in the CERN SPS showed that, thanks to on-board BPMs, the collimator could be precisely, rapidly, and safely aligned and the beam position accurately measured.</td></tr> <tr><td class="formatRecordLabel"> Copyright/License </td><td style="padding-left:5px;">publication: (License: CC-BY)</td></tr> </table> <br/>Email contact: <a href="mailto:sonia.escaffre@cern.ch">sonia.escaffre@cern.ch</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 2011-11-29, modifiée le 2024-02-23</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%3A1402570&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 /><a href="/record/1402570/files/CERN-ATS-2011-228.pdf"><img style="border:none" src="/img/file-icon-text-12x16.gif" alt="Télécharger le document"/>PDF</a><br /></div><small class="detailedRecordActions">Lien externe:</small><br /><small><a href="https://accelconf.web.cern.ch/IPAC2011/papers/TUPS035.pdf"><img style="border:none" src="/img/file-icon-text-12x16.gif" alt="Télécharger le document"/>Published version from JACoW</a></small> </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=1402570">Ajouter au panier personnel</a></li> <li>Exporter vers <a style="text-decoration:underline;font-weight:normal" href="/record/1402570/export/hx?ln=fr">BibTeX</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/1402570/export/hm?ln=fr">MARC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/1402570/export/xm?ln=fr">MARCXML</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/1402570/export/xd?ln=fr">DC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/1402570/export/xe?ln=fr">EndNote</a>,  <a style="text-decoration:underline;font-weight:normal" href="/record/1402570/export/xn?ln=fr">NLM</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/1402570/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/cds:1402570/add'); $('#bookmark_sciencewise').bookmark({sites: ['sciencewise']}); $('#bookmark').bookmark({ sites: ['facebook', 'twitter', 'linkedin', 'google_plusone'], icons: '/img/bookmarks.png', url: 'https://cds.cern.ch/record/1402570', addEmail: true, title: "LHC Collimators with Embedded Beam Position Monitors: A New Advanced Mechanical Design", description: "The LHC collimation system, ensuring both functions of beam cleaning and machine protection, is potentially submitted to high-energy beam impacts. Currently the collimators setup is performed by monitoring beam losses generated by the collimator jaws when approaching the particle beam. This procedure is applied to all LHC collimators (almost one hundred), taking several hours, and needs to be repeated if beam settings change significantly. Furthermore, during the beam-based alignment, the LHC tertiary collimators are potentially exposed to abnormal losses entailing possible damage to their tungsten jaws. To improve the efficiency of the machine operation and better control the particle beam a new advanced design embedding Beam Position Monitors (BPM) into the movable collimator jaws has been developed. This paper describes the mechanical design of various types of future collimators with embedded BPMs. Experimental measurements performed on a simplified functional prototype installed in the CERN SPS showed that, thanks to on-board BPMs, the collimator could be precisely, rapidly, and safely aligned and the beam position accurately measured." }); // ]]> </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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