Optics design with longer L* for the final focus system of Compact Linear Collider 380 GeV

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This paper reports on various optimizations of the CLIC 380-GeV Final Focus System (FFS). Analytical approximations have been used to guide the numerical optimizations. The first optimization consists of the reduction of the vertical beta function at the interaction point to 70 μm, which is at the limit of the hourglass effect. The second optimization focuses on minimizing the lengths of the final doublet quadrupoles to reduce the chromaticity. The third optimization searched for alternative optics configurations, resulting in the implementation of a novel dispersion profile along the FFS. This alternative optics boosts both total and peak luminosities by 7% and 9%, respectively. Pastushenko, Andrii; Tomás, Rogelio; Faus-Golfe, Angeles" /> <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="APS : Optics design with longer L* for the final focus system of Compact Linear Collider 380 GeV" name="citation_title" /> <meta content="Pastushenko, Andrii" name="citation_author" /> <meta content="Faus-Golfe, Angeles" name="citation_author" /> <meta content="Tomás, Rogelio" name="citation_author" /> <meta content="10.1103/PhysRevAccelBeams.26.091003" name="citation_doi" /> <meta content="Phys. 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This alternative optics boosts both total and peak luminosities by 7% and 9%, respectively." property="og:description" />  <meta content="summary" name="twitter:card" /> <style></style> </head> <body class="CERN32Document32Server search" lang="hr">  <div id="cern-toolbar"> <h1><a href="http://cern.ch" title="CERN">CERN <span>Accelerating science</span></a></h1> <ul> <li class="cern-accountlinks"><a class="cern-account" href="https://cds.cern.ch/youraccount/login?ln=hr&referer=https%3A//cds.cern.ch/record/2875181%3Fln%3Dhr" title="Sign in to your CERN account">Sign in</a></li> <li><a class="cern-directory" href="http://cern.ch/directory" title="Search CERN resources and browse the directory">Directory</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">Access articles, reports and multimedia content in HEP</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=hr">Pretraži</a></li> <li class="menu-444 "><a class="" title="" href="https://cds.cern.ch/submit?ln=hr">Prihvati</a></li> <li class="menu-426 "><a class="" href="https://cds.cern.ch/help/?ln=hr">Pomoć</a></li> <li class="leaf hassubcdsmenu"> <a hreflang="en" class="header" href="https://cds.cern.ch/youraccount/display?ln=hr">Personaliziraj</a> <ul class="subsubcdsmenu"><li><a href="https://cds.cern.ch/youralerts/list?ln=hr">Your alerts</a></li><li><a href="https://cds.cern.ch/yourbaskets/display?ln=hr">Your baskets</a></li><li><a href="https://cds.cern.ch/yourcomments?ln=hr">Your comments</a></li><li><a href="https://cds.cern.ch/youralerts/display?ln=hr">Your searches</a></li></ul></li> </ul> </div> </div> </div>  <table class="navtrailbox"> <tr> <td class="navtrailboxbody"> <a href="/?ln=hr" class="navtrail">Početna stranica</a> > Optics design with longer L* for the final focus system of Compact Linear Collider 380 GeV </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/2875181/?ln=hr">Information </a></li><li class=""><a href="/record/2875181/files?ln=hr">Files </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="2875181"></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"> Title </td><td style="padding-left:5px;"><b>Optics design with longer L* for the final focus system of Compact Linear Collider 380 GeV</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=Pastushenko%2C%20Andrii&ln=hr">Pastushenko, Andrii</a> (CERN ; IJCLab, Orsay) ; <a href="https://cds.cern.ch/search?f=author&p=Tom%C3%A1s%2C%20Rogelio&ln=hr">Tomás, Rogelio</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Faus-Golfe%2C%20Angeles&ln=hr">Faus-Golfe, Angeles</a> (IJCLab, Orsay)</td></tr> <tr><td class="formatRecordLabel"> Publication </td><td style="padding-left:5px;">2023</td></tr> <tr><td class="formatRecordLabel"> Number of pages </td><td style="padding-left:5px;">15</td></tr> <tr><td class="formatRecordLabel"> In: </td><td style="padding-left:5px;"><a href="http://dx.doi.org/10.1103/PhysRevAccelBeams.26.091003"><i>Phys. Rev. Accel. Beams</i> 26 (2023) 091003</a> </a></td></tr> <tr><td class="formatRecordLabel"> DOI </td><td style="padding-left:5px;"><a href="http://dx.doi.org/10.1103/PhysRevAccelBeams.26.091003" title="DOI" target="_blank">10.1103/PhysRevAccelBeams.26.091003</a> (publication) <tr><td class="formatRecordLabel"> Subject category </td><td style="padding-left:5px;">Accelerators and Storage Rings</td></tr> <tr><td class="formatRecordLabel"> Accelerator/Facility, Experiment </td><td style="padding-left:5px;"><a href="https://cds.cern.ch/search?p=CLIC&f=693__a">CLIC</a></td></tr> <tr><td class="formatRecordLabel"> Abstract </td><td style="padding-left:5px;">The Compact Linear Collider (CLIC) plans to start operation at a center-of-mass energy of 380 GeV. This paper reports on various optimizations of the CLIC 380-GeV Final Focus System (FFS). Analytical approximations have been used to guide the numerical optimizations. The first optimization consists of the reduction of the vertical beta function at the interaction point to 70 μm, which is at the limit of the hourglass effect. The second optimization focuses on minimizing the lengths of the final doublet quadrupoles to reduce the chromaticity. The third optimization searched for alternative optics configurations, resulting in the implementation of a novel dispersion profile along the FFS. This alternative optics boosts both total and peak luminosities by 7% and 9%, respectively.</td></tr> <tr><td class="formatRecordLabel"> Copyright/License </td><td style="padding-left:5px;">publication: © 2023-2025 authors (License: <a href="https://creativecommons.org/licenses/by/4.0/">CC BY 4.0</a>)</td></tr> </table> <br/>Corresponding record in: <a href="http://inspirehep.net/record/2703418">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">Back to search</a> </span></div></div> <div class="bottom-left-folded"><div class="recordlastmodifiedbox" style="position:relative;margin-left:1px"> Zapis kreiran 2023-10-10, zadnja izmjena 2024-02-19</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=hr&p=recid%3A2875181&rm=wrd" class="moreinfo">Slični zapisi</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">Cjeloviti tekst:</small> <br /><a href="/record/2875181/files/Publication.pdf"><img style="border:none" src="/img/file-icon-text-34x48.gif" alt="Download fulltext" /><br />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=hr&recid=2875181">Add to personal basket</a></li> <li>Export as <a style="text-decoration:underline;font-weight:normal" href="/record/2875181/export/hx?ln=hr">BibTeX</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2875181/export/hm?ln=hr">MARC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2875181/export/xm?ln=hr">MARCXML</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2875181/export/xd?ln=hr">DC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2875181/export/xe?ln=hr">EndNote</a>,  <a style="text-decoration:underline;font-weight:normal" href="/record/2875181/export/xn?ln=hr">NLM</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2875181/export/xw?ln=hr">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:2875181/add'); $('#bookmark_sciencewise').bookmark({sites: ['sciencewise']}); $('#bookmark').bookmark({ sites: ['facebook', 'twitter', 'linkedin', 'google_plusone'], icons: '/img/bookmarks.png', url: 'https://cds.cern.ch/record/2875181', addEmail: true, title: "Optics design with longer L* for the final focus system of Compact Linear Collider 380\u00a0GeV", description: "The Compact Linear Collider (CLIC) plans to start operation at a center-of-mass energy of 380\u00a0GeV. This paper reports on various optimizations of the CLIC 380-GeV Final Focus System (FFS). Analytical approximations have been used to guide the numerical optimizations. The first optimization consists of the reduction of the vertical beta function at the interaction point to 70\u2009\u2009\u03bcm, which is at the limit of the hourglass effect. The second optimization focuses on minimizing the lengths of the final doublet quadrupoles to reduce the chromaticity. The third optimization searched for alternative optics configurations, resulting in the implementation of a novel dispersion profile along the FFS. This alternative optics boosts both total and peak luminosities by 7% and 9%, respectively." }); // ]]> </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=hr">Pretraži</a> :: <a class="footer" href="https://cds.cern.ch/submit?ln=hr">Prihvati</a> :: <a class="footer" href="https://cds.cern.ch/youraccount/display?ln=hr">Personaliziraj</a> :: <a class="footer" href="https://cds.cern.ch/help/?ln=hr">Pomoć</a> :: <a class="footer" href="https://cern.service-now.com/service-portal?id=privacy_policy&se=CDS-Service" target="_blank">Privacy Notice</a> :: <a class="footer" href="https://repository.cern/content-policy" target="_blank">Content Policy</a> :: <a class="footer" href="https://repository.cern/terms" target="_blank">Terms and Conditions</a> <br /> Powered by <a class="footer" href="http://invenio-software.org/">Invenio</a> <br /> Održava <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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Optics design with longer L* for the final focus system of Compact Linear Collider 380 GeV - CERN Document Server