Simulations of incoherent effects driven by electron clouds forming in the inner triplets of the Large Hadron Collider

<!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="sv" xml:lang="sv" xmlns:og="http://ogp.me/ns#" xmlns:fb="http://ogp.me/ns/fb#"> <head> <title>Simulations of incoherent effects driven by electron clouds forming in the inner triplets of the 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="http://cds.cern.ch/img/invenio.css?v=20141127" type="text/css" /> <link rel="stylesheet" href="http://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="http://cds.cern.ch/img/cern_toolbar/css/toolbar.css" type="text/css" />    <link rel="canonical" href="http://cds.cern.ch/record/2913741/files/" /> <link rel="alternate" hreflang="el" href="http://cds.cern.ch/record/2913741/files/?ln=el" /> <link rel="alternate" hreflang="fr" href="http://cds.cern.ch/record/2913741/files/?ln=fr" /> <link rel="alternate" hreflang="bg" href="http://cds.cern.ch/record/2913741/files/?ln=bg" /> <link rel="alternate" hreflang="zh-TW" href="http://cds.cern.ch/record/2913741/files/?ln=zh_TW" /> <link rel="alternate" hreflang="pt" href="http://cds.cern.ch/record/2913741/files/?ln=pt" /> <link rel="alternate" hreflang="no" href="http://cds.cern.ch/record/2913741/files/?ln=no" /> <link rel="alternate" hreflang="hr" href="http://cds.cern.ch/record/2913741/files/?ln=hr" /> <link rel="alternate" hreflang="ca" href="http://cds.cern.ch/record/2913741/files/?ln=ca" /> <link rel="alternate" hreflang="de" href="http://cds.cern.ch/record/2913741/files/?ln=de" /> <link rel="alternate" hreflang="it" href="http://cds.cern.ch/record/2913741/files/?ln=it" /> <link rel="alternate" hreflang="zh-CN" href="http://cds.cern.ch/record/2913741/files/?ln=zh_CN" /> <link rel="alternate" hreflang="sv" href="http://cds.cern.ch/record/2913741/files/?ln=sv" /> <link rel="alternate" hreflang="sk" href="http://cds.cern.ch/record/2913741/files/?ln=sk" /> <link rel="alternate" hreflang="en" href="http://cds.cern.ch/record/2913741/files/?ln=en" /> <link rel="alternate" hreflang="pl" href="http://cds.cern.ch/record/2913741/files/?ln=pl" /> <link rel="alternate" hreflang="ru" href="http://cds.cern.ch/record/2913741/files/?ln=ru" /> <link rel="alternate" hreflang="ka" href="http://cds.cern.ch/record/2913741/files/?ln=ka" /> <link rel="alternate" hreflang="ja" href="http://cds.cern.ch/record/2913741/files/?ln=ja" /> <link rel="alternate" hreflang="es" href="http://cds.cern.ch/record/2913741/files/?ln=es" /> <link rel="alternate" type="application/rss+xml" title="CERN Document Server RSS" href="http://cds.cern.ch/rss" /> <link rel="search" type="application/opensearchdescription+xml" href="http://cds.cern.ch/opensearchdescription" title="CERN Document Server" /> <link rel="unapi-server" type="application/xml" title="unAPI" href="http://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="sv" /> <meta name="description" content="During Run 2 and Run 3 of the Large Hadron Collider (LHC), slow losses from electron cloud (e-cloud) effects have been systematically observed during the full duration of fills with closely-spaced proton bunches. In particular, these effects had been found to depend strongly on the crossing angle of the two beams and the value of the betatron functions in the interaction points. Due to this observation, the main cause of this effect was attributed to the non-linear forces induced by electron clouds forming in the vacuum chamber of the LHC Inner Triplet quadrupole magnets. In this contribution, electron cloud buildup simulations reveal that the induced forces depend strongly on the transverse coordinates of the beam particles, on time, as well as on the longitudinal coordinate within the Inner Triplet. Finally, non-linear maps are generated based on the buildup simulations, and the effect of these forces on the motion of the protons is simulated. Paraschou, Konstantinos; Iadarola, Giovanni; Mether, Lotta" /> <meta name="keywords" content="simulation, electron, electronics, bunching, betatron, quadrupole" /> <script type="text/javascript" src="http://cds.cern.ch/js/jquery.min.js"></script>  <link rel="stylesheet" href="http://cds.cern.ch/img/webnews.css" type="text/css" />  <script type="text/javascript" src="http://cds.cern.ch/js/webnews.js?v=20131009"></script> <meta property="fb:app_id" content="137353533001720"/> <style></style> </head> <body class="search" lang="sv">  <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=sv&referer=http%3A//cds.cern.ch/record/2913741/files/%3Fln%3Dsv" 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="http://cds.cern.ch/?ln=sv">Sök</a></li> <li class="menu-444 "><a class="" title="" href="http://cds.cern.ch/submit?ln=sv">Skicka in</a></li> <li class="menu-426 "><a class="" href="http://cds.cern.ch/help/?ln=sv">Hjälp</a></li> <li class="leaf hassubcdsmenu"> <a hreflang="en" class="header" href="https://cds.cern.ch/youraccount/display?ln=sv">Personifiera</a> <ul class="subsubcdsmenu"><li><a href="https://cds.cern.ch/youralerts/list?ln=sv">Your alerts</a></li><li><a href="https://cds.cern.ch/yourbaskets/display?ln=sv">Your baskets</a></li><li><a href="https://cds.cern.ch/yourcomments?ln=sv">Your comments</a></li><li><a href="https://cds.cern.ch/youralerts/display?ln=sv">Your searches</a></li></ul></li> </ul> </div> </div> </div>  <table class="navtrailbox"> <tr> <td class="navtrailboxbody"> <a href="/?ln=sv" class="navtrail">Hem</a> > > <a class="navtrail" href="http://cds.cern.ch/record/2913741">Simulations of incoherent effects driven by electron clouds forming in the inner triplets of the Large Hadron Collider</a> > Åtkomst till fulltext </td> </tr> </table> </div> <div class="pagebody"><div class="pagebodystripemiddle"> <div class="detailedrecordbox"> <div class="detailedrecordtabs"> <div> <ul class="detailedrecordtabs"><li class="first"><a href="http://cds.cern.ch/record/2913741/?ln=sv">Information </a></li><li class="on"><a href="http://cds.cern.ch/record/2913741/files?ln=sv">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">  <div id="detailedrecordshortreminder"> <div id="clip"> </div> <div id="HB"> <strong><a href="/record/2913741?ln=sv">Simulations of incoherent effects driven by electron clouds forming in the inner triplets of the Large Hadron Collider</a></strong> - <a href="/search?f=author&p=Paraschou%2C%20Konstantinos&ln=sv">Paraschou, Konstantinos</a> <em>et al</em> </div> </div> <div style="clear:both;height:1px"> </div> <div style="width:90%;margin:auto;min-height:100px;margin-top:10px">  <small><b>Main</b> fil(er):</small><ul><table border="0" cellspacing="1" class="searchbox"> <tr> <td align="left" colspan="2" class="portalboxheader"> <img src='http://cds.cern.ch/img/smallfiles.gif' border="0" />  document </td> </tr><tr> <td class="portalboxheader"> <font size="-2">version 1</font> </td> <td> <table> <tr> <td valign="top"> <small><a href="http://cds.cern.ch/record/2913741/files/document.pdf?version=1">document.pdf</a></small> </td> <td valign="top"> <font size="-2" color="green">[3.08 MB]</font> <font size="-2"><em>16 okt 2024, 09:18</em> </td> <td valign="top"><em>Fulltext</em></td> </tr></table></td></tr></table></ul> </div> <div class="bottom-left-folded"></div> <div class="bottom-right-folded" style="text-align:right;padding-bottom:2px;"> <span class="moreinfo" style="margin-right:10px;"><a href="/search?ln=sv&p=recid%3A2913741&rm=wrd" class="moreinfo">Similar records</a></span></div> </div> </div> </div> <br/> </div></div> <footer id="footer" class="pagefooter clearfix">  <div class="pagefooterstripeleft"> CERN Document Server :: <a class="footer" href="http://cds.cern.ch/?ln=sv">Sök</a> :: <a class="footer" href="http://cds.cern.ch/submit?ln=sv">Skicka in</a> :: <a class="footer" href="https://cds.cern.ch/youraccount/display?ln=sv">Personifiera</a> :: <a class="footer" href="http://cds.cern.ch/help/?ln=sv">Hjälp</a> :: <a class="footer" href="https://cern.service-now.com/service-portal?id=privacy_policy&se=CDS-Service" target="_blank">Privacy Notice</a> <br /> Baserad på <a class="footer" href="http://invenio-software.org/">Invenio</a> <br /> Underhålls av <a class="footer" href="https://cern.service-now.com/service-portal?id=service_element&name=CDS-Service">CDS Service</a> - 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Simulations of incoherent effects driven by electron clouds forming in the inner triplets of the Large Hadron Collider - CERN Document Server