CINXE.COM

<!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="zh" xml:lang="zh" xmlns:og="http://ogp.me/ns#" xmlns:fb="http://ogp.me/ns/fb#"> <head> <title>Corrections of Systematic Normal Decapole Field Errors in the HL-LHC Separation/Recombination Dipoles - 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/2839975" /> <link rel="alternate" hreflang="el" href="https://cds.cern.ch/record/2839975?ln=el" /> <link rel="alternate" hreflang="fr" href="https://cds.cern.ch/record/2839975?ln=fr" /> <link rel="alternate" hreflang="bg" href="https://cds.cern.ch/record/2839975?ln=bg" /> <link rel="alternate" hreflang="zh-TW" href="https://cds.cern.ch/record/2839975?ln=zh_TW" /> <link rel="alternate" hreflang="pt" href="https://cds.cern.ch/record/2839975?ln=pt" /> <link rel="alternate" hreflang="no" href="https://cds.cern.ch/record/2839975?ln=no" /> <link rel="alternate" hreflang="hr" href="https://cds.cern.ch/record/2839975?ln=hr" /> <link rel="alternate" hreflang="ca" href="https://cds.cern.ch/record/2839975?ln=ca" /> <link rel="alternate" hreflang="de" href="https://cds.cern.ch/record/2839975?ln=de" /> <link rel="alternate" hreflang="it" href="https://cds.cern.ch/record/2839975?ln=it" /> <link rel="alternate" hreflang="zh-CN" href="https://cds.cern.ch/record/2839975?ln=zh_CN" /> <link rel="alternate" hreflang="sv" href="https://cds.cern.ch/record/2839975?ln=sv" /> <link rel="alternate" hreflang="sk" href="https://cds.cern.ch/record/2839975?ln=sk" /> <link rel="alternate" hreflang="en" href="https://cds.cern.ch/record/2839975?ln=en" /> <link rel="alternate" hreflang="pl" href="https://cds.cern.ch/record/2839975?ln=pl" /> <link rel="alternate" hreflang="ru" href="https://cds.cern.ch/record/2839975?ln=ru" /> <link rel="alternate" hreflang="ka" href="https://cds.cern.ch/record/2839975?ln=ka" /> <link rel="alternate" hreflang="ja" href="https://cds.cern.ch/record/2839975?ln=ja" /> <link rel="alternate" hreflang="es" href="https://cds.cern.ch/record/2839975?ln=es" /> <link rel="alternate" type="application/rss+xml" title="CERN Document Server RSS" href="/rss?ln=zh_TW" /> <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="zh_TW" /> <meta name="description" content="Magnetic measurements revealed that the new normal decapole ($b_5$) errors of the recombination dipoles (D2) for the HL-LHC could have a systematic component of up to 11 units. Based on previous studies, it was predicted that the current corrections would not be able to compensate this, thereby leading to a degradation of the dynamic aperture. On the other hand, the separation dipole D1 is expected to have a systematic $b_5$ component of 6 units to 7 units and its contribution to the resonance driving terms will partly compensate the effect of D2, due to the opposite field strength of the main component. Simulations were performed to address these concerns and to verify the compensation assumption, yet confirmed that the errors could only be partly compensated. In addition, various normal decapole resonance driving terms were examined as correction targets and the dependence of feed-down to amplitude detuning on this choice was discovered. Dilly, Joschua; Giovannozzi, Massimo; Tomás García, Rogelio; Van der Veken, Frederik" /> <meta name="keywords" content="target, resonance, dynamic-aperture, simulation, dipole" /> <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="Corrections of Systematic Normal Decapole Field Errors in the HL-LHC Separation/Recombination Dipoles" name="citation_title" /> <meta content="Dilly, Joschua" name="citation_author" /> <meta content="Giovannozzi, Massimo" name="citation_author" /> <meta content="Tomás García, Rogelio" name="citation_author" /> <meta content="Van der Veken, Frederik" name="citation_author" /> <meta content="10.18429/JACoW-IPAC2022-WEPOPT059" name="citation_doi" /> <meta content="JACoW IPAC" name="citation_journal_title" /> <meta content="2022" name="citation_volume" /> <meta content="1991-1994" name="citation_firstpage" /> <meta content="2022" name="citation_publication_date" /> <meta name="citation_online_date" content="2022/11/09"> <meta content="10.18429/JACoW-IPAC2022-WEPOPT059" name="citation_doi" /> <meta name="citation_pdf_url" content="https://cds.cern.ch/record/2839975/files/document.pdf" />  <meta content="Corrections of Systematic Normal Decapole Field Errors in the HL-LHC Separation/Recombination Dipoles" property="og:title" /> <meta content="website" property="og:type" /> <meta content="website" property="og:type" /> <meta content="https://cds.cern.ch/record/2839975" property="og:url" /> <meta content="CERN Document Server" property="og:site_name" /> <meta content="Magnetic measurements revealed that the new normal decapole ($b_5$) errors of the recombination dipoles (D2) for the HL-LHC could have a systematic component of up to 11 units. Based on previous studies, it was predicted that the current corrections would not be able to compensate this, thereby leading to a degradation of the dynamic aperture. On the other hand, the separation dipole D1 is expected to have a systematic $b_5$ component of 6 units to 7 units and its contribution to the resonance driving terms will partly compensate the effect of D2, due to the opposite field strength of the main component. Simulations were performed to address these concerns and to verify the compensation assumption, yet confirmed that the errors could only be partly compensated. In addition, various normal decapole resonance driving terms were examined as correction targets and the dependence of feed-down to amplitude detuning on this choice was discovered." property="og:description" /> <meta content="JACoW" property="og:description" />  <meta content="summary" name="twitter:card" /> <meta content="summary" name="twitter:card" /> <style></style> </head> <body class="CERN32Document32Server search" lang="zh">  <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=zh_TW&referer=https%3A//cds.cern.ch/record/2839975%3Fln%3Dzh_TW" 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=zh_TW">搜尋</a></li> <li class="menu-444 "><a class="" title="" href="https://cds.cern.ch/submit?ln=zh_TW">提交</a></li> <li class="menu-426 "><a class="" href="https://cds.cern.ch/help/?ln=zh_TW">幫助</a></li> <li class="leaf hassubcdsmenu"> <a hreflang="en" class="header" href="https://cds.cern.ch/youraccount/display?ln=zh_TW">個人化</a> <ul class="subsubcdsmenu"><li><a href="https://cds.cern.ch/youralerts/list?ln=zh_TW">Your alerts</a></li><li><a href="https://cds.cern.ch/yourbaskets/display?ln=zh_TW">Your baskets</a></li><li><a href="https://cds.cern.ch/yourcomments?ln=zh_TW">Your comments</a></li><li><a href="https://cds.cern.ch/youralerts/display?ln=zh_TW">Your searches</a></li></ul></li> </ul> </div> </div> </div>  <table class="navtrailbox"> <tr> <td class="navtrailboxbody"> <a href="/?ln=zh_TW" class="navtrail">主頁</a> > Corrections of Systematic Normal Decapole Field Errors in the HL-LHC Separation/Recombination Dipoles </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/2839975/?ln=zh_TW">Information </a></li><li class=""><a href="/record/2839975/files?ln=zh_TW">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="2839975"></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>Corrections of Systematic Normal Decapole Field Errors in the HL-LHC Separation/Recombination Dipoles</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=Dilly%2C%20Joschua&ln=zh_TW">Dilly, Joschua</a> (CERN ; Humboldt U., Berlin (main)) ; <a href="https://cds.cern.ch/search?f=author&p=Giovannozzi%2C%20Massimo&ln=zh_TW">Giovannozzi, Massimo</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Tom%C3%A1s%20Garc%C3%ADa%2C%20Rogelio&ln=zh_TW">Tomás García, Rogelio</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Van%20der%20Veken%2C%20Frederik&ln=zh_TW">Van der Veken, Frederik</a> (CERN)</td></tr> <tr><td class="formatRecordLabel"> Publication </td><td style="padding-left:5px;">2022</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="http://dx.doi.org/10.18429/JACoW-IPAC2022-WEPOPT059"><i>JACoW IPAC</i> 2022 (2022) 1991-1994</a> </a></td></tr> <tr><td class="formatRecordLabel"> In: </td><td style="padding-left:5px;"><a href="https://cds.cern.ch/record/2806400">13th International Particle Accelerator Conference (IPAC 2022)</a>, Bangkok, Thailand, 12 - 17 Jun 2022, pp.1991-1994</td></tr> <tr><td class="formatRecordLabel"> DOI </td><td style="padding-left:5px;"><a href="http://dx.doi.org/10.18429/JACoW-IPAC2022-WEPOPT059" title="DOI" target="_blank">10.18429/JACoW-IPAC2022-WEPOPT059</a> <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=CERN%20HL%20LHC&f=693__a">CERN HL LHC</a></td></tr> <tr><td class="formatRecordLabel"> Abstract </td><td style="padding-left:5px;">Magnetic measurements revealed that the new normal decapole ($b_5$) errors of the recombination dipoles (D2) for the HL-LHC could have a systematic component of up to 11 units. Based on previous studies, it was predicted that the current corrections would not be able to compensate this, thereby leading to a degradation of the dynamic aperture. On the other hand, the separation dipole D1 is expected to have a systematic $b_5$ component of 6 units to 7 units and its contribution to the resonance driving terms will partly compensate the effect of D2, due to the opposite field strength of the main component. Simulations were performed to address these concerns and to verify the compensation assumption, yet confirmed that the errors could only be partly compensated. In addition, various normal decapole resonance driving terms were examined as correction targets and the dependence of feed-down to amplitude detuning on this choice was discovered.</td></tr> <tr><td class="formatRecordLabel"> Copyright/License </td><td style="padding-left:5px;">publication: (License: <a href="http://creativecommons.org/licenses/by/3.0/">CC-BY-3.0</a>)</td></tr> </table> <br/>Corresponding record in: <a href="http://inspirehep.net/record/2136506">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"> 記錄創建於2022-11-09，最後更新在2022-11-10</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=zh_TW&p=recid%3A2839975&rm=wrd" class="moreinfo">相似記錄</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">全文:</small> <br /><a href="/record/2839975/files/document.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=zh_TW&recid=2839975">Add to personal basket</a></li> <li>Export as <a style="text-decoration:underline;font-weight:normal" href="/record/2839975/export/hx?ln=zh_TW">BibTeX</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2839975/export/hm?ln=zh_TW">MARC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2839975/export/xm?ln=zh_TW">MARCXML</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2839975/export/xd?ln=zh_TW">DC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2839975/export/xe?ln=zh_TW">EndNote</a>,  <a style="text-decoration:underline;font-weight:normal" href="/record/2839975/export/xn?ln=zh_TW">NLM</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2839975/export/xw?ln=zh_TW">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:2839975/add'); $('#bookmark_sciencewise').bookmark({sites: ['sciencewise']}); $('#bookmark').bookmark({ sites: ['facebook', 'twitter', 'linkedin', 'google_plusone'], icons: '/img/bookmarks.png', url: 'https://cds.cern.ch/record/2839975', addEmail: true, title: "Corrections of Systematic Normal Decapole Field Errors in the HL-LHC Separation/Recombination Dipoles", description: "Magnetic measurements revealed that the new normal decapole ($b_5$) errors of the recombination dipoles (D2) for the HL-LHC could have a systematic component of up to 11 units. Based on previous studies, it was predicted that the current corrections would not be able to compensate this, thereby leading to a degradation of the dynamic aperture. On the other hand, the separation dipole D1 is expected to have a systematic $b_5$\u00a0component of 6 units to 7 units and its contribution to the resonance driving terms will partly compensate the effect of D2, due to the opposite field strength of the main component. Simulations were performed to address these concerns and to verify the compensation assumption, yet confirmed that the errors could only be partly compensated. In addition, various normal decapole resonance driving terms were examined as correction targets and the dependence of feed-down to amplitude detuning on this choice was discovered." }); // ]]> </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=zh_TW">搜尋</a> :: <a class="footer" href="https://cds.cern.ch/submit?ln=zh_TW">提交</a> :: <a class="footer" href="https://cds.cern.ch/youraccount/display?ln=zh_TW">個人化</a> :: <a class="footer" href="https://cds.cern.ch/help/?ln=zh_TW">幫助</a> :: <a class="footer" href="https://cern.service-now.com/service-portal?id=privacy_policy&se=CDS-Service" target="_blank">Privacy Notice</a> <br /> 伺服器系統： <a class="footer" href="http://invenio-software.org/">Invenio</a> <br /> 管理者： <a class="footer" href="https://cern.service-now.com/service-portal?id=service_element&name=CDS-Service">CDS Service</a> - Need help? Contact <a href="https://cern.service-now.com/service-portal?id=service_element&name=CDS-Service">CDS Support</a>. <br /> </div> <div class="pagefooterstriperight"> <div class="cern-logo"> <a id="logo" href="http://cern.ch" title="CERN" rel="CERN" ><img src="https://cds.cern.ch/img/cern_theme/img/cern-logo-large.png" alt="CERN" /></a> </div> <div class="cern-languagebox"> 本網站提供以下語言選擇:<br /><a href="/record/2839975?ln=bg" class="langinfo">Български</a>  <a href="/record/2839975?ln=ca" class="langinfo">Català</a>  <a href="/record/2839975?ln=de" class="langinfo">Deutsch</a>  <a href="/record/2839975?ln=el" class="langinfo">Ελληνικά</a>  <a href="/record/2839975?ln=en" class="langinfo">English</a>  <a href="/record/2839975?ln=es" class="langinfo">Español</a>  <a href="/record/2839975?ln=fr" class="langinfo">Français</a>  <a href="/record/2839975?ln=hr" class="langinfo">Hrvatski</a>  <a href="/record/2839975?ln=it" class="langinfo">Italiano</a>  <a href="/record/2839975?ln=ja" class="langinfo">日本語</a>  <a href="/record/2839975?ln=ka" class="langinfo">ქართული</a>  <a href="/record/2839975?ln=no" class="langinfo">Norsk/Bokmål</a>  <a href="/record/2839975?ln=pl" class="langinfo">Polski</a>  <a href="/record/2839975?ln=pt" class="langinfo">Português</a>  <a href="/record/2839975?ln=ru" class="langinfo">Русский</a>  <a href="/record/2839975?ln=sk" class="langinfo">Slovensky</a>  <a href="/record/2839975?ln=sv" class="langinfo">Svenska</a>  <a href="/record/2839975?ln=zh_CN" class="langinfo">中文(简)</a>  <span class="langinfo">中文(繁)</span> </div> </div>  </footer> <script type="text/javascript"> var SyndeticsBookCovers = (function() { var SMALL_SIZE = "sc.gif", MEDIUM_SIZE = "mc.gif", RAW_URL = "https://secure.syndetics.com/index.aspx?isbn=THEISBN/THESIZE&client=cernlibrary"; replaceCover = function(imgElement, isbns, hdFormat) { var img = new Image(), size = hdFormat ? MEDIUM_SIZE : SMALL_SIZE; var _isbns = isbns.sort(function(a, b) { // sort from shortest to longest ISBN (more modern) return a.length > b.length ? 1 : -1; }); function next() { var isbn = _isbns.pop(); if (isbn) { var url = RAW_URL.replace("THEISBN", isbn).replace("THESIZE", size); img.src = url; } } function done() { imgElement.src = img.src; } img.onload = function() { if (this.width > 1) { done(); } else { next(); } }; next(); }; return { replaceCover: replaceCover }; })(); $(document).ready(function() { // get book covers $("img.book-cover").each(function() { var $this = $(this), strIsbns = $this.data("isbns") || "", isbnsArray = String(strIsbns).split(","), hdFormat = $this.hasClass("hd"); SyndeticsBookCovers.replaceCover(this, isbnsArray, hdFormat); }); // WebNews tooltips $.ajax({ url: "/news/tooltips", success: function(data) { create_tooltips(data); }, dataType: "json", cache: false }); }); </script>  <script src="//cds.cern.ch/js/feedback.js"></script>   <script> var _paq = window._paq = window._paq || []; /* tracker methods like "setCustomDimension" should be called before "trackPageView" */ _paq.push(['trackPageView']); _paq.push(['enableLinkTracking']); (function() { var u="https://webanalytics.web.cern.ch/"; _paq.push(['setTrackerUrl', u+'matomo.php']); _paq.push(['setSiteId', '756']); var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; g.async=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s); })(); </script>  </body> </html>