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="en" xml:lang="en" xmlns:og="http://ogp.me/ns#" xmlns:fb="http://ogp.me/ns/fb#"> <head> <title>Particle Tracks from Cloud Chambers - 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/2800482" /> <link rel="alternate" hreflang="el" href="https://cds.cern.ch/record/2800482?ln=el" /> <link rel="alternate" hreflang="fr" href="https://cds.cern.ch/record/2800482?ln=fr" /> <link rel="alternate" hreflang="bg" href="https://cds.cern.ch/record/2800482?ln=bg" /> <link rel="alternate" hreflang="zh-TW" href="https://cds.cern.ch/record/2800482?ln=zh_TW" /> <link rel="alternate" hreflang="pt" href="https://cds.cern.ch/record/2800482?ln=pt" /> <link rel="alternate" hreflang="no" href="https://cds.cern.ch/record/2800482?ln=no" /> <link rel="alternate" hreflang="hr" href="https://cds.cern.ch/record/2800482?ln=hr" /> <link rel="alternate" hreflang="ca" href="https://cds.cern.ch/record/2800482?ln=ca" /> <link rel="alternate" hreflang="de" href="https://cds.cern.ch/record/2800482?ln=de" /> <link rel="alternate" hreflang="it" href="https://cds.cern.ch/record/2800482?ln=it" /> <link rel="alternate" hreflang="zh-CN" href="https://cds.cern.ch/record/2800482?ln=zh_CN" /> <link rel="alternate" hreflang="sv" href="https://cds.cern.ch/record/2800482?ln=sv" /> <link rel="alternate" hreflang="sk" href="https://cds.cern.ch/record/2800482?ln=sk" /> <link rel="alternate" hreflang="en" href="https://cds.cern.ch/record/2800482?ln=en" /> <link rel="alternate" hreflang="pl" href="https://cds.cern.ch/record/2800482?ln=pl" /> <link rel="alternate" hreflang="ru" href="https://cds.cern.ch/record/2800482?ln=ru" /> <link rel="alternate" hreflang="ka" href="https://cds.cern.ch/record/2800482?ln=ka" /> <link rel="alternate" hreflang="ja" href="https://cds.cern.ch/record/2800482?ln=ja" /> <link rel="alternate" hreflang="es" href="https://cds.cern.ch/record/2800482?ln=es" /> <link rel="alternate" type="application/rss+xml" title="CERN Document Server RSS" href="/rss?ln=en" /> <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="en" /> <meta name="description" content="Particles coming from the universe are crossing the earth all the time – they are harmless but invisible to us. Cloud Chambers are detectors which make the tracks of the particles visible. Some decades ago these detectors were used at CERN in the first particle physics experiments. " /> <meta name="keywords" content="DE" /> <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="Particle Tracks from Cloud Chambers" name="citation_title" /> <meta name="citation_online_date" content="2022/01/26"> <meta content="CERN-OBJ-DE-123" name="citation_technical_report_number" />  <meta content="Particle Tracks from Cloud Chambers" property="og:title" /> <meta content="website" property="og:type" /> <meta content="https://cds.cern.ch/record/2800482" property="og:url" /> <meta name="twitter:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber6.png?subformat=icon-180" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber6.png?subformat=icon-180" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber6.png?subformat=icon-180" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber6.png" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber6.png" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber7.png?subformat=icon-180" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber7.png?subformat=icon-180" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber7.png" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber7.png" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber4.png?subformat=icon-180" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber4.png?subformat=icon-180" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber4.png" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber4.png" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber5.png?subformat=icon-180" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber5.png?subformat=icon-180" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber5.png" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber5.png" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber2.png?subformat=icon-180" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber2.png?subformat=icon-180" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber2.png" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber2.png" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber3.png?subformat=icon-180" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber3.png?subformat=icon-180" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber3.png" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber3.png" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber1.png?subformat=icon-180" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber1.png?subformat=icon-180" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber1.png" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber1.png" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber6.gif?subformat=icon" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber6.gif?subformat=icon" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber6.png?subformat=icon-180" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber6.png?subformat=icon-180" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber7.gif?subformat=icon" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber7.gif?subformat=icon" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber7.png?subformat=icon-180" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber7.png?subformat=icon-180" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber4.gif?subformat=icon" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber4.gif?subformat=icon" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber4.png?subformat=icon-180" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber4.png?subformat=icon-180" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber5.gif?subformat=icon" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber5.gif?subformat=icon" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber5.png?subformat=icon-180" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber5.png?subformat=icon-180" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber2.gif?subformat=icon" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber2.gif?subformat=icon" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber2.png?subformat=icon-180" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber2.png?subformat=icon-180" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber3.gif?subformat=icon" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber3.gif?subformat=icon" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber3.png?subformat=icon-180" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber3.png?subformat=icon-180" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber1.gif?subformat=icon" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber1.gif?subformat=icon" /> <meta property="og:image" content="https://cds.cern.ch/record/2800482/files/bubblechamber1.png?subformat=icon-180" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2800482/files/bubblechamber1.png?subformat=icon-180" /> <meta content="CERN Document Server" property="og:site_name" /> <meta content="Particles coming from the universe are crossing the earth all the time – they are harmless but invisible to us. Cloud Chambers are detectors which make the tracks of the particles visible. Some decades ago these detectors were used at CERN in the first particle physics experiments." property="og:description" />  <meta content="summary" name="twitter:card" /> <style></style> </head> <body class="CERN32Document32Server search" lang="en">  <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=en&referer=https%3A//cds.cern.ch/record/2800482" 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=en">Search</a></li> <li class="menu-444 "><a class="" title="" href="https://cds.cern.ch/submit?ln=en">Submit</a></li> <li class="menu-426 "><a class="" href="https://cds.cern.ch/help/?ln=en">Help</a></li> <li class="leaf hassubcdsmenu"> <a hreflang="en" class="header" href="https://cds.cern.ch/youraccount/display?ln=en">Personalize</a> <ul class="subsubcdsmenu"><li><a href="https://cds.cern.ch/youralerts/list?ln=en">Your alerts</a></li><li><a href="https://cds.cern.ch/yourbaskets/display?ln=en">Your baskets</a></li><li><a href="https://cds.cern.ch/yourcomments?ln=en">Your comments</a></li><li><a href="https://cds.cern.ch/youralerts/display?ln=en">Your searches</a></li></ul></li> </ul> </div> </div> </div>  <table class="navtrailbox"> <tr> <td class="navtrailboxbody"> <a href="/?ln=en" class="navtrail">Home</a> > Particle Tracks from Cloud Chambers </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/2800482/?ln=en">Information </a></li><li class=""><a href="/record/2800482/files?ln=en">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="2800482"></abbr>  <script type="text/javascript" src="https://cds.cern.ch/highslide/highslide.js"></script> <script type="text/javascript" src="/static/unveil/jquery.unveil.js"></script>  <script type="text/javascript"> // remove the registerOverlay call to disable the controlbar hs.registerOverlay( { thumbnailId: null, overlayId: 'controlbar', position: 'top right', hideOnMouseOut: true } ); hs.graphicsDir = 'https://cds.cern.ch/highslide/graphics/'; hs.outlineType = 'rounded-white'; hs.zIndexCounter = 10001; // Tell Highslide to use the thumbnail's title for captions hs.creditsText = '© CERN'; hs.creditsHref = 'http://cern.ch/cern-copyright'; hs.creditsTitle = 'The use of photos requires prior authorization from CERN'; $(document).ready(function() { $(".lazy").unveil(); }); </script>  <link rel="stylesheet" href="https://cds.cern.ch/highslide/highslide.css" type="text/css" /> <style type="text/css">  </style> <table class="formatRecordTableFullWidth"> <tr> <td class="formatRecordHeader" colspan="2"> <a style="color:#fff;text-decoration:none;" href="https://cds.cern.ch/?c=Exhibition+Objects">Exhibition Objects</a> </td> </tr> <tr><td class="formatRecordLabel"> Report number </td><td style="padding-left:5px;">CERN-OBJ-DE-123</td></tr> <tr><td class="formatRecordLabel"> Category </td><td style="padding-left:5px;">Detectors and experimental techniques</td></tr> <tr><td class="formatRecordLabel" width="120px"> Title </td><td style="padding-left:5px;"><b>Particle Tracks from Cloud Chambers</b></td></tr> <tr><td class="formatRecordLabel"> Description </td><td style="padding-left:5px;">Particles coming from the universe are crossing the earth all the time – they are harmless but invisible to us. Cloud Chambers are detectors which make the tracks of the particles visible. Some decades ago these detectors were used at CERN in the first particle physics experiments.</td></tr> <tr><td class="formatRecordLabel"> Keywords </td><td style="padding-left:5px;"><a href="https://cds.cern.ch/search?f=keyword&p=DE&ln=en">DE</a></td></tr> <tr> <td class="formatRecordLabel"> Physical characteristics </td> <td style="padding-left:5px;"> Length: various<br /> Weight: Very light<br /> </td> </tr> <tr><td class="formatRecordLabel"> Location </td><td style="padding-left:5px;">Building b. 282 </td></tr> <tr><td class="formatRecordLabel"> Availability </td><td style="padding-left:5px;">Available</td></tr> <tr><td class="formatRecordLabel"> Access </td><td style="padding-left:5px;">Public</td></tr> <tr><td class="formatRecordLabel"> File(s) </td><td style="padding-left:5px;"><div style="clear:both"><center><small><strong>© CERN</strong></small></center><center><small><a href="https://cds.cern.ch/help/high-res-multimedia?ln=en">Accessing copyrighted material</a></small></center><br /><script> $(document).ready(function() { $("#photodisplaycontrol").click(function(){ if ($(this).text() == "View as Slideshow"){ $(this).text("View as list"); $("#photodisplaycontent1").hide(); $("#photodisplaycontent2").show(); $("#slideshowcontent").html('<iframe width="550" height="420" scrolling="no" frameborder="0" src="https://cds.cern.ch/images/CERN-OBJ-DE-123/export?format=sspp&ln=en&captions=true" allowfullscreen></iframe>'); } else { $(this).text("View as Slideshow"); $("#photodisplaycontent2").hide(); $("#photodisplaycontent1").show(); $("#slideshowcontent").html(''); } }); }); </script><style> .photocontroler { background-color: #E6E6FA; margin-left: 10px; padding: 3px; width: 115px; text-align: center; border-radius: 2px; border: 1px solid #C6C6C6; white-space: nowrap; } #photodisplaycontrol { text-decoration: none; font-size: small; color: #555444; text-align: center; } </style><div class="photocontroler"><a href="#" id="photodisplaycontrol">View as Slideshow</a></div><div id="photodisplaycontent1"><div style="text-align:center">Total images: 7</div> <div style="text-align:center;display:inline-block;margin:10px"> <div style="width:180px;display:inline-block;text-align:center;vertical-align:top;"> <a id="thumb1" href="https://cds.cern.ch/record/2800482/files/bubblechamber1.png?subformat=icon-180" class="highslide" onclick="return hs.expand(this)"> <img src='/img/file-icon-image-96x128.png' data-src="https://cds.cern.ch/record/2800482/files/bubblechamber1.gif?subformat=icon" style="max-height:140px; max-width:180px;" alt="" title="CERN-OBJ-DE-123-1" class="lazy"/> </a> <div class="highslide-caption"> <b>CERN-OBJ-DE-123-1</b>  -  <a href="https://cds.cern.ch/record/2800482/files/bubblechamber1.gif?subformat=icon" data-size="GIF;ICON">GIF;ICON</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber1.png" data-size="PNG">PNG</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber1.png?subformat=icon-180" data-size="PNG;ICON-180">PNG;ICON-180</a> <br/> </div> <br/> <div class="image-download-links" style="color:#888;font-size:x-small;display:block;clear:both">CERN-OBJ-DE-123-1 <br/><a href="https://cds.cern.ch/record/2800482/files/bubblechamber1.gif?subformat=icon" style="color:#888;font-size:x-small" data-size="GIF;ICON">GIF;ICON</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber1.png" style="color:#888;font-size:x-small" data-size="PNG">PNG</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber1.png?subformat=icon-180" style="color:#888;font-size:x-small" data-size="PNG;ICON-180">PNG;ICON-180</a><br/><span style="color: #444;font-size:small"></span></div></div> </div> <div style="text-align:center;display:inline-block;margin:10px"> <div style="width:180px;display:inline-block;text-align:center;vertical-align:top;"> <a id="thumb2" href="https://cds.cern.ch/record/2800482/files/bubblechamber2.png?subformat=icon-180" class="highslide" onclick="return hs.expand(this)"> <img src='/img/file-icon-image-96x128.png' data-src="https://cds.cern.ch/record/2800482/files/bubblechamber2.gif?subformat=icon" style="max-height:140px; max-width:180px;" alt="" title="CERN-OBJ-DE-123-2" class="lazy"/> </a> <div class="highslide-caption"> <b>CERN-OBJ-DE-123-2</b>  -  <a href="https://cds.cern.ch/record/2800482/files/bubblechamber2.gif?subformat=icon" data-size="GIF;ICON">GIF;ICON</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber2.png" data-size="PNG">PNG</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber2.png?subformat=icon-180" data-size="PNG;ICON-180">PNG;ICON-180</a> <br/> </div> <br/> <div class="image-download-links" style="color:#888;font-size:x-small;display:block;clear:both">CERN-OBJ-DE-123-2 <br/><a href="https://cds.cern.ch/record/2800482/files/bubblechamber2.gif?subformat=icon" style="color:#888;font-size:x-small" data-size="GIF;ICON">GIF;ICON</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber2.png" style="color:#888;font-size:x-small" data-size="PNG">PNG</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber2.png?subformat=icon-180" style="color:#888;font-size:x-small" data-size="PNG;ICON-180">PNG;ICON-180</a><br/><span style="color: #444;font-size:small"></span></div></div> </div> <div style="text-align:center;display:inline-block;margin:10px"> <div style="width:180px;display:inline-block;text-align:center;vertical-align:top;"> <a id="thumb3" href="https://cds.cern.ch/record/2800482/files/bubblechamber3.png?subformat=icon-180" class="highslide" onclick="return hs.expand(this)"> <img src='/img/file-icon-image-96x128.png' data-src="https://cds.cern.ch/record/2800482/files/bubblechamber3.gif?subformat=icon" style="max-height:140px; max-width:180px;" alt="" title="CERN-OBJ-DE-123-3" class="lazy"/> </a> <div class="highslide-caption"> <b>CERN-OBJ-DE-123-3</b>  -  <a href="https://cds.cern.ch/record/2800482/files/bubblechamber3.gif?subformat=icon" data-size="GIF;ICON">GIF;ICON</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber3.png" data-size="PNG">PNG</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber3.png?subformat=icon-180" data-size="PNG;ICON-180">PNG;ICON-180</a> <br/> </div> <br/> <div class="image-download-links" style="color:#888;font-size:x-small;display:block;clear:both">CERN-OBJ-DE-123-3 <br/><a href="https://cds.cern.ch/record/2800482/files/bubblechamber3.gif?subformat=icon" style="color:#888;font-size:x-small" data-size="GIF;ICON">GIF;ICON</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber3.png" style="color:#888;font-size:x-small" data-size="PNG">PNG</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber3.png?subformat=icon-180" style="color:#888;font-size:x-small" data-size="PNG;ICON-180">PNG;ICON-180</a><br/><span style="color: #444;font-size:small"></span></div></div> </div> <div style="text-align:center;display:inline-block;margin:10px"> <div style="width:180px;display:inline-block;text-align:center;vertical-align:top;"> <a id="thumb4" href="https://cds.cern.ch/record/2800482/files/bubblechamber4.png?subformat=icon-180" class="highslide" onclick="return hs.expand(this)"> <img src='/img/file-icon-image-96x128.png' data-src="https://cds.cern.ch/record/2800482/files/bubblechamber4.gif?subformat=icon" style="max-height:140px; max-width:180px;" alt="" title="CERN-OBJ-DE-123-4" class="lazy"/> </a> <div class="highslide-caption"> <b>CERN-OBJ-DE-123-4</b>  -  <a href="https://cds.cern.ch/record/2800482/files/bubblechamber4.gif?subformat=icon" data-size="GIF;ICON">GIF;ICON</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber4.png" data-size="PNG">PNG</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber4.png?subformat=icon-180" data-size="PNG;ICON-180">PNG;ICON-180</a> <br/> </div> <br/> <div class="image-download-links" style="color:#888;font-size:x-small;display:block;clear:both">CERN-OBJ-DE-123-4 <br/><a href="https://cds.cern.ch/record/2800482/files/bubblechamber4.gif?subformat=icon" style="color:#888;font-size:x-small" data-size="GIF;ICON">GIF;ICON</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber4.png" style="color:#888;font-size:x-small" data-size="PNG">PNG</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber4.png?subformat=icon-180" style="color:#888;font-size:x-small" data-size="PNG;ICON-180">PNG;ICON-180</a><br/><span style="color: #444;font-size:small"></span></div></div> </div> <div style="text-align:center;display:inline-block;margin:10px"> <div style="width:180px;display:inline-block;text-align:center;vertical-align:top;"> <a id="thumb5" href="https://cds.cern.ch/record/2800482/files/bubblechamber5.png?subformat=icon-180" class="highslide" onclick="return hs.expand(this)"> <img src='/img/file-icon-image-96x128.png' data-src="https://cds.cern.ch/record/2800482/files/bubblechamber5.gif?subformat=icon" style="max-height:140px; max-width:180px;" alt="" title="CERN-OBJ-DE-123-5" class="lazy"/> </a> <div class="highslide-caption"> <b>CERN-OBJ-DE-123-5</b>  -  <a href="https://cds.cern.ch/record/2800482/files/bubblechamber5.gif?subformat=icon" data-size="GIF;ICON">GIF;ICON</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber5.png" data-size="PNG">PNG</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber5.png?subformat=icon-180" data-size="PNG;ICON-180">PNG;ICON-180</a> <br/> </div> <br/> <div class="image-download-links" style="color:#888;font-size:x-small;display:block;clear:both">CERN-OBJ-DE-123-5 <br/><a href="https://cds.cern.ch/record/2800482/files/bubblechamber5.gif?subformat=icon" style="color:#888;font-size:x-small" data-size="GIF;ICON">GIF;ICON</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber5.png" style="color:#888;font-size:x-small" data-size="PNG">PNG</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber5.png?subformat=icon-180" style="color:#888;font-size:x-small" data-size="PNG;ICON-180">PNG;ICON-180</a><br/><span style="color: #444;font-size:small"></span></div></div> </div> <div style="text-align:center;display:inline-block;margin:10px"> <div style="width:180px;display:inline-block;text-align:center;vertical-align:top;"> <a id="thumb6" href="https://cds.cern.ch/record/2800482/files/bubblechamber6.png?subformat=icon-180" class="highslide" onclick="return hs.expand(this)"> <img src='/img/file-icon-image-96x128.png' data-src="https://cds.cern.ch/record/2800482/files/bubblechamber6.gif?subformat=icon" style="max-height:140px; max-width:180px;" alt="" title="CERN-OBJ-DE-123-6" class="lazy"/> </a> <div class="highslide-caption"> <b>CERN-OBJ-DE-123-6</b>  -  <a href="https://cds.cern.ch/record/2800482/files/bubblechamber6.gif?subformat=icon" data-size="GIF;ICON">GIF;ICON</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber6.png" data-size="PNG">PNG</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber6.png?subformat=icon-180" data-size="PNG;ICON-180">PNG;ICON-180</a> <br/> </div> <br/> <div class="image-download-links" style="color:#888;font-size:x-small;display:block;clear:both">CERN-OBJ-DE-123-6 <br/><a href="https://cds.cern.ch/record/2800482/files/bubblechamber6.gif?subformat=icon" style="color:#888;font-size:x-small" data-size="GIF;ICON">GIF;ICON</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber6.png" style="color:#888;font-size:x-small" data-size="PNG">PNG</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber6.png?subformat=icon-180" style="color:#888;font-size:x-small" data-size="PNG;ICON-180">PNG;ICON-180</a><br/><span style="color: #444;font-size:small"></span></div></div> </div> <div style="text-align:center;display:inline-block;margin:10px"> <div style="width:180px;display:inline-block;text-align:center;vertical-align:top;"> <a id="thumb7" href="https://cds.cern.ch/record/2800482/files/bubblechamber7.png?subformat=icon-180" class="highslide" onclick="return hs.expand(this)"> <img src='/img/file-icon-image-96x128.png' data-src="https://cds.cern.ch/record/2800482/files/bubblechamber7.gif?subformat=icon" style="max-height:140px; max-width:180px;" alt="" title="CERN-OBJ-DE-123-7" class="lazy"/> </a> <div class="highslide-caption"> <b>CERN-OBJ-DE-123-7</b>  -  <a href="https://cds.cern.ch/record/2800482/files/bubblechamber7.gif?subformat=icon" data-size="GIF;ICON">GIF;ICON</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber7.png" data-size="PNG">PNG</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber7.png?subformat=icon-180" data-size="PNG;ICON-180">PNG;ICON-180</a> <br/> </div> <br/> <div class="image-download-links" style="color:#888;font-size:x-small;display:block;clear:both">CERN-OBJ-DE-123-7 <br/><a href="https://cds.cern.ch/record/2800482/files/bubblechamber7.gif?subformat=icon" style="color:#888;font-size:x-small" data-size="GIF;ICON">GIF;ICON</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber7.png" style="color:#888;font-size:x-small" data-size="PNG">PNG</a>, <a href="https://cds.cern.ch/record/2800482/files/bubblechamber7.png?subformat=icon-180" style="color:#888;font-size:x-small" data-size="PNG;ICON-180">PNG;ICON-180</a><br/><span style="color: #444;font-size:small"></span></div></div> </div><script type="text/javascript"> window.onload = function() { if (location.hash != ''){ var pic = document.getElementById('thumb'+location.hash.substring(1)); if (pic != null){ hs.expand(pic) } } } </script> <script type="text/javascript"> function toggle_images_visibility(){ var more = document.getElementById('more'); var link = document.getElementById('link'); more.innerHTML = more.innerHTML.substring(4, more.innerHTML.length - 3); link.style.display='none'; hs.updateAnchors(); } </script> </div><div id="photodisplaycontent2" style="display:none; text-align:center; padding:15px;"> <span id="slideshowcontent"></span> <div style="clear:both;"></div> <style> a.embedLinkSS { background-color: #fafafa; color: #222; border: #ddd solid 1px; padding: 4px; font-size: x-small; font-weight: 700; } table.embedLinkSS { background-color:#eee; border:#ddd solid 1px; margin:0 auto; } </style><div style="margin-top:10px;"><a href="#" class="embedLinkSS" onclick="$(this).hide();$('#embedSlideshow').show();return false;">Embed record as a slideshow</a><table class="embedLinkSS" style="display:none" id="embedSlideshow"> <tr><th colspan="4" style="text-align:center;font-size:small">Copy-paste this code into your page:</th></tr> <tr><td><textarea readonly="readonly" rows="3" cols="50"><iframe width="480" height="360" scrolling="no" frameborder="0" src="https://cds.cern.ch/images/CERN-OBJ-DE-123/export?format=sspp&ln=en&captions=true" allowfullscreen></iframe></textarea></td></tr></table></div> </div><div style="clear:both"> </div></div><div style="clear:both"> </div></td></tr> </table> <p style="font-size:small"> Many objects of this database may be borrowed: see the <a href="https://visit.cern/exhibitions-object-loans">loan conditions</a>. </p> <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"> Record created 2022-01-26, last modified 2022-01-26</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=en&p=recid%3A2800482&rm=wrd" class="moreinfo">Similar records</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">Fulltext:</small> <br /><em>bubblechamber2</em> - <a href="/record/2800482/files/bubblechamber2.png"><img style="border:none" src="/img/file-icon-text-12x16.gif" alt="Download fulltext"/>PNG</a><br /><em>bubblechamber3</em> - <a href="/record/2800482/files/bubblechamber3.png"><img style="border:none" src="/img/file-icon-text-12x16.gif" alt="Download fulltext"/>PNG</a><br /><em>bubblechamber1</em> - <a href="/record/2800482/files/bubblechamber1.png"><img style="border:none" src="/img/file-icon-text-12x16.gif" alt="Download fulltext"/>PNG</a><br /><small>(<a href="/record/2800482/files/">additional files</a>)</small><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=en&recid=2800482">Add to personal basket</a></li> <li>Export as <a style="text-decoration:underline;font-weight:normal" href="/record/2800482/export/hx?ln=en">BibTeX</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2800482/export/hm?ln=en">MARC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2800482/export/xm?ln=en">MARCXML</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2800482/export/xd?ln=en">DC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2800482/export/xe?ln=en">EndNote</a>,  <a style="text-decoration:underline;font-weight:normal" href="/record/2800482/export/xn?ln=en">NLM</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2800482/export/xw?ln=en">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:2800482/add'); $('#bookmark_sciencewise').bookmark({sites: ['sciencewise']}); $('#bookmark').bookmark({ sites: ['facebook', 'twitter', 'linkedin', 'google_plusone'], icons: '/img/bookmarks.png', url: 'https://cds.cern.ch/record/2800482', addEmail: true, title: "Particle Tracks from Cloud Chambers", description: "Particles coming from the universe are crossing the earth all the time \u2013 they are harmless but invisible to us. Cloud Chambers are detectors which make the tracks of the particles visible. Some decades ago these detectors were used at CERN in the first particle physics experiments." }); // ]]> </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=en">Search</a> :: <a class="footer" href="https://cds.cern.ch/submit?ln=en">Submit</a> :: <a class="footer" href="https://cds.cern.ch/youraccount/display?ln=en">Personalize</a> :: <a class="footer" href="https://cds.cern.ch/help/?ln=en">Help</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 /> Maintained by <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"> This site is also available in the following languages:<br /><a href="/record/2800482?ln=bg" class="langinfo">Български</a>  <a href="/record/2800482?ln=ca" class="langinfo">Català</a>  <a href="/record/2800482?ln=de" class="langinfo">Deutsch</a>  <a href="/record/2800482?ln=el" class="langinfo">Ελληνικά</a>  <span class="langinfo">English</span>  <a href="/record/2800482?ln=es" class="langinfo">Español</a>  <a href="/record/2800482?ln=fr" class="langinfo">Français</a>  <a href="/record/2800482?ln=hr" class="langinfo">Hrvatski</a>  <a href="/record/2800482?ln=it" class="langinfo">Italiano</a>  <a href="/record/2800482?ln=ja" class="langinfo">日本語</a>  <a href="/record/2800482?ln=ka" class="langinfo">ქართული</a>  <a href="/record/2800482?ln=no" class="langinfo">Norsk/Bokmål</a>  <a href="/record/2800482?ln=pl" class="langinfo">Polski</a>  <a href="/record/2800482?ln=pt" class="langinfo">Português</a>  <a href="/record/2800482?ln=ru" class="langinfo">Русский</a>  <a href="/record/2800482?ln=sk" class="langinfo">Slovensky</a>  <a href="/record/2800482?ln=sv" class="langinfo">Svenska</a>  <a href="/record/2800482?ln=zh_CN" class="langinfo">中文(简)</a>  <a href="/record/2800482?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>