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="de" xml:lang="de" xmlns:og="http://ogp.me/ns#" xmlns:fb="http://ogp.me/ns/fb#"> <head> <title>Introduction to Structured laser beam for alignment and status of the R&D - 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/2849065" /> <link rel="alternate" hreflang="el" href="https://cds.cern.ch/record/2849065?ln=el" /> <link rel="alternate" hreflang="fr" href="https://cds.cern.ch/record/2849065?ln=fr" /> <link rel="alternate" hreflang="bg" href="https://cds.cern.ch/record/2849065?ln=bg" /> <link rel="alternate" hreflang="zh-TW" href="https://cds.cern.ch/record/2849065?ln=zh_TW" /> <link rel="alternate" hreflang="pt" href="https://cds.cern.ch/record/2849065?ln=pt" /> <link rel="alternate" hreflang="no" href="https://cds.cern.ch/record/2849065?ln=no" /> <link rel="alternate" hreflang="hr" href="https://cds.cern.ch/record/2849065?ln=hr" /> <link rel="alternate" hreflang="ca" href="https://cds.cern.ch/record/2849065?ln=ca" /> <link rel="alternate" hreflang="de" href="https://cds.cern.ch/record/2849065?ln=de" /> <link rel="alternate" hreflang="it" href="https://cds.cern.ch/record/2849065?ln=it" /> <link rel="alternate" hreflang="zh-CN" href="https://cds.cern.ch/record/2849065?ln=zh_CN" /> <link rel="alternate" hreflang="sv" href="https://cds.cern.ch/record/2849065?ln=sv" /> <link rel="alternate" hreflang="sk" href="https://cds.cern.ch/record/2849065?ln=sk" /> <link rel="alternate" hreflang="en" href="https://cds.cern.ch/record/2849065?ln=en" /> <link rel="alternate" hreflang="pl" href="https://cds.cern.ch/record/2849065?ln=pl" /> <link rel="alternate" hreflang="ru" href="https://cds.cern.ch/record/2849065?ln=ru" /> <link rel="alternate" hreflang="ka" href="https://cds.cern.ch/record/2849065?ln=ka" /> <link rel="alternate" hreflang="ja" href="https://cds.cern.ch/record/2849065?ln=ja" /> <link rel="alternate" hreflang="es" href="https://cds.cern.ch/record/2849065?ln=es" /> <link rel="alternate" type="application/rss+xml" title="CERN Document Server RSS" href="/rss?ln=de" /> <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="de" /> <meta name="description" content="A new method of generating a Structured Laser Beam (SLB) has been proposed recently. The SLB is a pseudo- non-diffractive optical beam. Its transverse optical intensity profile looks similar to that of a quasi Bessel beam and shows a narrow central core of high intensity surrounded by concentric circles. The SLB has the ability to propagate over very long distances, theoretically to infinity with a low divergence of the central core beam. It has been tested up to 200 m and during the experiments a divergence of typically 0.01 mrad has been measured, the diameter of the central spot at start being about 0.01 mm. The SLB properties open potential applications in different domains, comprising geodetic and large scale metrology. Even if the SLB is still at a research stage it appears as a promising candidate for the development of optical long range reference lines for alignment systems. This article is an introduction to the SLB, to its generation principle and to some of its characteristics, in particular the ones interesting for alignment. It relates the status of some aspects of the on-going research. It summarizes some SLB study results, among them the creation of SLBs at long distances, the study and simulations of beam straightness, or the creation of SLB with non-classical polarization. Gayde, Jean-Christophe; Polak, Krystof; Sulc, Miroslav" /> <meta name="keywords" content="Structured laser beam, SLB, optical beam, metrology, alignment, polarization" /> <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="Introduction to Structured laser beam for alignment and status of the R&amp;D" name="citation_title" /> <meta content="Gayde, Jean-Christophe" name="citation_author" /> <meta content="Sulc, Miroslav" name="citation_author" /> <meta content="Polak, Krystof" name="citation_author" /> <meta content="2022/10/31" name="citation_publication_date" /> <meta name="citation_online_date" content="2023/02/15"> <meta content="CERN-BE-2023-013" name="citation_technical_report_number" /> <meta name="citation_pdf_url" content="https://cds.cern.ch/record/2849065/files/CERN-BE-2023-013.pdf" />  <meta content="Introduction to Structured laser beam for alignment and status of the R&amp;D" property="og:title" /> <meta content="website" property="og:type" /> <meta content="website" property="og:type" /> <meta content="https://cds.cern.ch/record/2849065" property="og:url" /> <meta content="CERN Document Server" property="og:site_name" /> <meta content="A new method of generating a Structured Laser Beam (SLB) has been proposed recently. The SLB is a pseudo- non-diffractive optical beam. Its transverse optical intensity profile looks similar to that of a quasi Bessel beam and shows a narrow central core of high intensity surrounded by concentric circles. The SLB has the ability to propagate over very long distances, theoretically to infinity with a low divergence of the central core beam. It has been tested up to 200 m and during the experiments a divergence of typically 0.01 mrad has been measured, the diameter of the central spot at start being about 0.01 mm. The SLB properties open potential applications in different domains, comprising geodetic and large scale metrology. Even if the SLB is still at a research stage it appears as a promising candidate for the development of optical long range reference lines for alignment systems. This article is an introduction to the SLB, to its generation principle and to some of its characteristics, in particular the ones interesting for alignment. It relates the status of some aspects of the on-going research. It summarizes some SLB study results, among them the creation of SLBs at long distances, the study and simulations of beam straightness, or the creation of SLB with non-classical polarization." property="og:description" />  <meta content="summary" name="twitter:card" /> <meta content="summary" name="twitter:card" /> <style></style> </head> <body class="CERN32Document32Server search" lang="de">  <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=de&referer=https%3A//cds.cern.ch/record/2849065%3Fln%3Dde" 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=de">Suchen</a></li> <li class="menu-444 "><a class="" title="" href="https://cds.cern.ch/submit?ln=de">Absenden</a></li> <li class="menu-426 "><a class="" href="https://cds.cern.ch/help/?ln=de">Hilfe</a></li> <li class="leaf hassubcdsmenu"> <a hreflang="en" class="header" href="https://cds.cern.ch/youraccount/display?ln=de">Personalisieren</a> <ul class="subsubcdsmenu"><li><a href="https://cds.cern.ch/youralerts/list?ln=de">Ihre Benachrichtigungen</a></li><li><a href="https://cds.cern.ch/yourbaskets/display?ln=de">Ihre Körbe</a></li><li><a href="https://cds.cern.ch/yourcomments?ln=de">Your comments</a></li><li><a href="https://cds.cern.ch/youralerts/display?ln=de">Ihre Suchanfragen</a></li></ul></li> </ul> </div> </div> </div>  <table class="navtrailbox"> <tr> <td class="navtrailboxbody"> <a href="/?ln=de" class="navtrail">Hauptseite</a> > Introduction to Structured laser beam for alignment and status of the R&D </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/2849065/?ln=de">Information </a></li><li class=""><a href="/record/2849065/files?ln=de">Dateien </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="2849065"></abbr>  <link href="/img/download_and_embed_buttons.css" rel="stylesheet" type="text/css" /> <style type="text/css">  .video_talk_wrapper{ max-width: 640px; min-height: 360px; } </style> <table class="formatRecordTableFullWidth"> <tr> <td class="formatRecordHeader" style="background-image: url('/img/journals.jpg');" colspan="2">  Preprint </td> </tr> <tr><td class="formatRecordLabel"> Report number </td><td style="padding-left:5px;">CERN-BE-2023-013</td></tr> <tr><td class="formatRecordLabel"> Title </td><td style="padding-left:5px;"><b>Introduction to Structured laser beam for alignment and status of the R&D</b></td></tr> <style> .video_control_container, #video_controlbutton { display: none; }#video_detailbox_download {display: none;}#video_detailbox_embed {display: none;}</style> <div class="video_control_container"> <div style="box-sizing: inherit;position: relative;min-height: 1em;margin: 1em 0;background: #f8f8f9;padding: 1em 1.5em;line-height: 1.4285em;transition: opacity .1s ease,color .1s ease,background .1s ease,box-shadow .1s ease,-webkit-box-shadow .1s ease;border-radius: .28571429rem;font-size: 1.1em;margin-top: 0;margin-bottom: 6px;background-color: #f8ffff;color: #276f86;box-shadow: 0 0 0 1px #a9d5de inset,0 0 0 0 transparent;"> <i class="fa fa-info"></i><span style="padding-left: 9px;">If you experience any problem watching the video, click the download button below</span> </div> <a id="video_controlbutton_download" rel="download_button" class="video_controlbutton" href="#">Download</a> <a id="video_controlbutton_embed" class="video_controlbutton" href="#">Embed</a> </div> <div id="video_detailbox_download" style="margin:10px"> </div> <div id="video_detailbox_embed" style="margin:10px"> </div> <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=Gayde%2C%20Jean-Christophe&ln=de">Gayde, Jean-Christophe</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Polak%2C%20Krystof&ln=de">Polak, Krystof</a> (Liberec Technical University (CZ)) ; <a href="https://cds.cern.ch/search?f=author&p=Sulc%2C%20Miroslav&ln=de">Sulc, Miroslav</a> (Liberec Technical University (CZ))</td></tr> <tr><td class="formatRecordLabel"> Publication </td><td style="padding-left:5px;">2022</td></tr>  <script type="text/javascript"> /* * Changes the Imprint title to Date - Duration as requested by RQF0820114 * This is a hack not to touch the general imprint format element */ $(document).ready(function() { var collections = 'PREPRINT ; ConferencePaper'; if (collections.indexOf('E-LEARNING') > -1) { $('.cern-imprint-label').text('Date - Duration'); } }) </script> <tr><td class="formatRecordLabel cern-imprint-label"> Imprint </td><td style="padding-left:5px;">31 Oct 2022</td></tr> <tr><td class="formatRecordLabel"> Number of pages </td><td style="padding-left:5px;">7</td></tr>  <tr><td class="formatRecordLabel"> Presented at </td><td style="padding-left:5px;"><a href="https://cds.cern.ch/record/2841583">16th International Workshop on Accelerator Alignment (IWAA 2022)</a>, Ferney-Voltaire, France, 31 Oct - 4 Nov 2022</td></tr> <tr><td class="formatRecordLabel"> Subject category </td><td style="padding-left:5px;">Engineering</td></tr> <tr><td class="formatRecordLabel"> Keywords </td><td style="padding-left:5px;"><a href="https://cds.cern.ch/search?f=keyword&p=Structured%20laser%20beam&ln=de">Structured laser beam</a> ; <a href="https://cds.cern.ch/search?f=keyword&p=SLB&ln=de">SLB</a> ; <a href="https://cds.cern.ch/search?f=keyword&p=optical%20beam&ln=de">optical beam</a> ; <a href="https://cds.cern.ch/search?f=keyword&p=metrology&ln=de">metrology</a> ; <a href="https://cds.cern.ch/search?f=keyword&p=alignment&ln=de">alignment</a> ; <a href="https://cds.cern.ch/search?f=keyword&p=polarization&ln=de">polarization</a></td></tr> <tr><td class="formatRecordLabel"> Abstract </td><td style="padding-left:5px;">A new method of generating a Structured Laser Beam (SLB) has been proposed recently. The SLB is a pseudo- non-diffractive optical beam. Its transverse optical intensity profile looks similar to that of a quasi Bessel beam and shows a narrow central core of high intensity surrounded by concentric circles. The SLB has the ability to propagate over very long distances, theoretically to infinity with a low divergence of the central core beam. It has been tested up to 200 m and during the experiments a divergence of typically 0.01 mrad has been measured, the diameter of the central spot at start being about 0.01 mm. The SLB properties open potential applications in different domains, comprising geodetic and large scale metrology. Even if the SLB is still at a research stage it appears as a promising candidate for the development of optical long range reference lines for alignment systems. This article is an introduction to the SLB, to its generation principle and to some of its characteristics, in particular the ones interesting for alignment. It relates the status of some aspects of the on-going research. It summarizes some SLB study results, among them the creation of SLBs at long distances, the study and simulations of beam straightness, or the creation of SLB with non-classical polarization.</td></tr> <tr><td class="formatRecordLabel"> Submitted by </td><td style="padding-left:5px;"><a href="mailto:jeanette.kotzian@cern.ch">jeanette.kotzian@cern.ch</a></td></tr> </table> <br/><div><div style="clear: both;"> </div></div> <script type="text/javascript"> // Initially hide: $(".longCaption").hide(); // Allow to toggle visibility: $(".toggleLongCaption").toggle(function(){ $(this).siblings(".longCaption").show('fast'); var thisElem = $(this); thisElem.text(thisElem.text() === "mehr" ? "weniger" : "mehr"); },function(){ $(this).siblings(".longCaption").hide('fast'); var thisElem = $(this); thisElem.text(thisElem.text() === "mehr" ? "weniger" : "mehr"); }); </script> <br/><br/><div align="right"><div style="padding-bottom:2px;padding-top:30px;"><span class="moreinfo" style="margin-right:10px;"> <a href="" class="moreinfo">Zurück zur Suche</a> </span></div></div> <div class="bottom-left-folded"><div class="recordlastmodifiedbox" style="position:relative;margin-left:1px"> Datensatz erzeugt am 2023-02-15, letzte Änderung am 2023-04-19</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=de&p=recid%3A2849065&rm=wrd" class="moreinfo">Ähnliche Datensätze</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">Volltext:</small> <br /><a href="/record/2849065/files/CERN-BE-2023-013.pdf"><img style="border:none" src="/img/file-icon-text-34x48.gif" alt="Volltext herunterladen" /><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=de&recid=2849065">Zum persönlichen Korb hinzufügen</a></li> <li>Export als <a style="text-decoration:underline;font-weight:normal" href="/record/2849065/export/hx?ln=de">BibTeX</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2849065/export/hm?ln=de">MARC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2849065/export/xm?ln=de">MARCXML</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2849065/export/xd?ln=de">DC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2849065/export/xe?ln=de">EndNote</a>,  <a style="text-decoration:underline;font-weight:normal" href="/record/2849065/export/xn?ln=de">NLM</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2849065/export/xw?ln=de">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:2849065/add'); $('#bookmark_sciencewise').bookmark({sites: ['sciencewise']}); $('#bookmark').bookmark({ sites: ['facebook', 'twitter', 'linkedin', 'google_plusone'], icons: '/img/bookmarks.png', url: 'https://cds.cern.ch/record/2849065', addEmail: true, title: "Introduction to Structured laser beam for alignment and status of the R&D", description: "A new method of generating a Structured Laser Beam (SLB) has been proposed recently. The SLB is a pseudo- non-diffractive optical beam. Its transverse optical intensity profile looks similar to that of a quasi Bessel beam and shows a narrow central core of high intensity surrounded by concentric circles. The SLB has the ability to propagate over very long distances, theoretically to infinity with a low divergence of the central core beam. It has been tested up to 200 m and during the experiments a divergence of typically 0.01 mrad has been measured, the diameter of the central spot at start being about 0.01 mm. The SLB properties open potential applications in different domains, comprising geodetic and large scale metrology. Even if the SLB is still at a research stage it appears as a promising candidate for the development of optical long range reference lines for alignment systems. This article is an introduction to the SLB, to its generation principle and to some of its characteristics, in particular the ones interesting for alignment. It relates the status of some aspects of the on-going research. It summarizes some SLB study results, among them the creation of SLBs at long distances, the study and simulations of beam straightness, or the creation of SLB with non-classical polarization." }); // ]]> </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=de">Suchen</a> :: <a class="footer" href="https://cds.cern.ch/submit?ln=de">Absenden</a> :: <a class="footer" href="https://cds.cern.ch/youraccount/display?ln=de">Personalisieren</a> :: <a class="footer" href="https://cds.cern.ch/help/?ln=de">Hilfe</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 /> Verwaltet von <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"> Diese Seite gibt es auch in den folgenden Sprachen:<br /><a href="/record/2849065?ln=bg" class="langinfo">Български</a>  <a href="/record/2849065?ln=ca" class="langinfo">Català</a>  <span class="langinfo">Deutsch</span>  <a href="/record/2849065?ln=el" class="langinfo">Ελληνικά</a>  <a href="/record/2849065?ln=en" class="langinfo">English</a>  <a href="/record/2849065?ln=es" class="langinfo">Español</a>  <a href="/record/2849065?ln=fr" class="langinfo">Français</a>  <a href="/record/2849065?ln=hr" class="langinfo">Hrvatski</a>  <a href="/record/2849065?ln=it" class="langinfo">Italiano</a>  <a href="/record/2849065?ln=ja" class="langinfo">日本語</a>  <a href="/record/2849065?ln=ka" class="langinfo">ქართული</a>  <a href="/record/2849065?ln=no" class="langinfo">Norsk/Bokmål</a>  <a href="/record/2849065?ln=pl" class="langinfo">Polski</a>  <a href="/record/2849065?ln=pt" class="langinfo">Português</a>  <a href="/record/2849065?ln=ru" class="langinfo">Русский</a>  <a href="/record/2849065?ln=sk" class="langinfo">Slovensky</a>  <a href="/record/2849065?ln=sv" class="langinfo">Svenska</a>  <a href="/record/2849065?ln=zh_CN" class="langinfo">中文(简)</a>  <a href="/record/2849065?ln=zh_TW" class="langinfo">中文(繁)</a> </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>