Recent Results from the IR Upgrade FEL at Jefferson Lab

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We report here on the lasing results to date using this new configuration. We have demonstrated a large reduction in THz heating on the mirrors. We have also eliminated heating in the mirror steering assemblies, making operation at high power much more stable. Finally, we have greatly reduced astigmatism in the optical cavity, allowing operation with a very short Rayleigh range. The laser has been tuned from 0.9 to 3.1 microns using the new wiggler. User experiments commenced in April of 2005 with the FEL Upgrade operating over the 1-3 micron range. We are in the process of installing a 5.5 cm permanent magnet wiggler that will give us even larger tuning range and higher power. Benson, S V; Beard, K; Behre, C P; Biallas, G H; Boyce, J; Douglas, D; Dylla, H F D; Evans, R; Grippo, A G; Gubeli, J G; Hardy, D; Hernandez-Garcia, C; Jordan, K; Merminga, L; Neil, G; Preble, J P; Shinn, M D; Siggins, T; Walker, R L; Williams, G P; Zhang, S" /> <meta name="keywords" content="CERN Document Server, WebSearch, CERN Document Server" /> <script type="text/javascript" src="https://cds.cern.ch/js/jquery.min.js"></script>  <link rel="stylesheet" href="https://cds.cern.ch/img/webnews.css" type="text/css" />  <script type="text/javascript" src="https://cds.cern.ch/js/webnews.js?v=20131009"></script> <meta property="fb:app_id" content="137353533001720"/> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ tex2jax: {inlineMath: [['$','$']], processEscapes: true}, showProcessingMessages: false, messageStyle: "none" }); </script> <script src="/MathJax/MathJax.js?config=TeX-AMS_CHTML" type="text/javascript"> </script>  <meta content="Recent Results from the IR Upgrade FEL at Jefferson Lab" name="citation_title" /> <meta content="Benson, S V" name="citation_author" /> <meta content="Boyce, J" name="citation_author" /> <meta content="Douglas, D" name="citation_author" /> <meta content="Zhang, S" name="citation_author" /> <meta content="Preble, J P" name="citation_author" /> <meta content="Gubeli, J G" name="citation_author" /> <meta content="Grippo, A G" name="citation_author" /> <meta content="Jordan, K" name="citation_author" /> <meta content="Merminga, L" name="citation_author" /> <meta content="Neil, G" name="citation_author" /> <meta content="Williams, G P" name="citation_author" /> <meta content="Hernandez-Garcia, C" name="citation_author" /> <meta content="Dylla, H F D" name="citation_author" /> <meta content="Beard, K" name="citation_author" /> <meta content="Walker, R L" name="citation_author" /> <meta content="Evans, R" name="citation_author" /> <meta content="Siggins, T" name="citation_author" /> <meta content="Biallas, G H" name="citation_author" /> <meta content="Hardy, D" name="citation_author" /> <meta content="Shinn, M D" name="citation_author" /> <meta content="Behre, C P" name="citation_author" /> <meta content="2005" name="citation_publication_date" /> <meta name="citation_online_date" content="2006/01/31">  <meta content="Recent Results from the IR Upgrade FEL at Jefferson Lab" property="og:title" /> <meta content="website" property="og:type" /> <meta content="https://cds.cern.ch/record/925287" property="og:url" /> <meta content="CERN Document Server" property="og:site_name" /> <meta content="After demonstrating 10 kW operation with 1 second pulses, the Jefferson Lab program switched to demonstrating high power operation at short wavelengths using a new 8 cm period wiggler and a THz suppression chicane. 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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>Recent Results from the IR Upgrade FEL at Jefferson Lab</b></td></tr> <tr><td class="formatRecordLabel"><span style="white-space:nowrap;"> Author(s) </span> </td><td style="padding-left:5px;"> <script type="text/javascript"> function toggle_authors_visibility(){ var more = document.getElementById('more'); var link = document.getElementById('link'); var extension = document.getElementById('extension'); if (more.style.display=='none'){ more.style.display = ''; extension.style.display = 'none'; link.innerHTML = "Schovaj" } else { more.style.display = 'none'; extension.style.display = ''; link.innerHTML = "Show all 21 authors" } link.style.color = "rgb(204,0,0);" } function set_up(){ var extension = document.getElementById('extension'); extension.innerHTML = ""; toggle_authors_visibility(); } </script> <a name="show_hide" /><a href="https://cds.cern.ch/search?f=author&p=Benson%2C%20S%20V&ln=sk">Benson, S V</a> ; <a href="https://cds.cern.ch/search?f=author&p=Beard%2C%20K&ln=sk">Beard, K</a> ; <a href="https://cds.cern.ch/search?f=author&p=Behre%2C%20C%20P&ln=sk">Behre, C P</a> ; <a href="https://cds.cern.ch/search?f=author&p=Biallas%2C%20G%20H&ln=sk">Biallas, G H</a> ; <a href="https://cds.cern.ch/search?f=author&p=Boyce%2C%20J&ln=sk">Boyce, J</a> ; <a href="https://cds.cern.ch/search?f=author&p=Douglas%2C%20D&ln=sk">Douglas, D</a> ; <a href="https://cds.cern.ch/search?f=author&p=Dylla%2C%20H%20F%20D&ln=sk">Dylla, H F D</a> ; <a href="https://cds.cern.ch/search?f=author&p=Evans%2C%20R&ln=sk">Evans, R</a> ; <a href="https://cds.cern.ch/search?f=author&p=Grippo%2C%20A%20G&ln=sk">Grippo, A G</a> ; <a href="https://cds.cern.ch/search?f=author&p=Gubeli%2C%20J%20G&ln=sk">Gubeli, J G</a><span id="more" style=""> ; <a href="https://cds.cern.ch/search?f=author&p=Hardy%2C%20D&ln=sk">Hardy, D</a> ; <a href="https://cds.cern.ch/search?f=author&p=Hernandez-Garcia%2C%20C&ln=sk">Hernandez-Garcia, C</a> ; <a href="https://cds.cern.ch/search?f=author&p=Jordan%2C%20K&ln=sk">Jordan, K</a> ; <a href="https://cds.cern.ch/search?f=author&p=Merminga%2C%20L&ln=sk">Merminga, L</a> ; <a href="https://cds.cern.ch/search?f=author&p=Neil%2C%20G&ln=sk">Neil, G</a> ; <a href="https://cds.cern.ch/search?f=author&p=Preble%2C%20J%20P&ln=sk">Preble, J P</a> ; <a href="https://cds.cern.ch/search?f=author&p=Shinn%2C%20M%20D&ln=sk">Shinn, M D</a> ; <a href="https://cds.cern.ch/search?f=author&p=Siggins%2C%20T&ln=sk">Siggins, T</a> ; <a href="https://cds.cern.ch/search?f=author&p=Walker%2C%20R%20L&ln=sk">Walker, R L</a> ; <a href="https://cds.cern.ch/search?f=author&p=Williams%2C%20G%20P&ln=sk">Williams, G P</a> ; <a href="https://cds.cern.ch/search?f=author&p=Zhang%2C%20S&ln=sk">Zhang, S</a></span> <span id="extension"></span> <small><i><a id="link" href="#" onclick="toggle_authors_visibility()" style="color:rgb(204,0,0);"></a></i></small><script type="text/javascript">set_up()</script></td></tr> <tr><td class="formatRecordLabel"> Affiliation </td><td style="padding-left:5px;">(Jefferson Lab, Newport News, Virginia JAEA/FEL, Ibaraki-ken)</td></tr> <tr><td class="formatRecordLabel"> Publication </td><td style="padding-left:5px;">2005</td></tr> <tr><td class="formatRecordLabel"> In: </td><td style="padding-left:5px;"><a href="https://cds.cern.ch/record/925048">27th International Conference on Free Electron Lasers</a>, Palo Alto, CA, USA, 21 - 26 Aug 2005, pp.e-proc. MOOB004</td></tr> <tr><td class="formatRecordLabel"> Subject category </td><td style="padding-left:5px;">Accelerators and Storage Rings</td></tr> <tr><td class="formatRecordLabel"> Abstract </td><td style="padding-left:5px;">After demonstrating 10 kW operation with 1 second pulses, the Jefferson Lab program switched to demonstrating high power operation at short wavelengths using a new 8 cm period wiggler and a THz suppression chicane. We report here on the lasing results to date using this new configuration. We have demonstrated a large reduction in THz heating on the mirrors. We have also eliminated heating in the mirror steering assemblies, making operation at high power much more stable. Finally, we have greatly reduced astigmatism in the optical cavity, allowing operation with a very short Rayleigh range. The laser has been tuned from 0.9 to 3.1 microns using the new wiggler. User experiments commenced in April of 2005 with the FEL Upgrade operating over the 1-3 micron range. We are in the process of installing a 5.5 cm permanent magnet wiggler that will give us even larger tuning range and higher power.</td></tr> </table> <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">Naspäť k hľadaniu</a> </span></div></div> <div class="bottom-left-folded"><div class="recordlastmodifiedbox" style="position:relative;margin-left:1px"> Záznam vytvorený 2006-01-31, zmenený 2024-02-23</div></div> <div class="bottom-right-folded" style="text-align:right;padding-bottom:2px;"> <span class="moreinfo" style="margin-right:10px;"></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"> <small class="detailedRecordActions">External link:</small><br /><small><a href="https://accelconf.web.cern.ch/f05/PAPERS/MOOB004"><img style="border:none" src="/img/file-icon-text-34x48.gif" alt="Nahraj plný text" /><br />Published version from JACoW</a></small> </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=sk&recid=925287">Pridaj do osobného košíka</a></li> <li>Exportuj ako <a style="text-decoration:underline;font-weight:normal" href="/record/925287/export/hx?ln=sk">BibTeX</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/925287/export/hm?ln=sk">MARC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/925287/export/xm?ln=sk">MARCXML</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/925287/export/xd?ln=sk">DC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/925287/export/xe?ln=sk">EndNote</a>,  <a style="text-decoration:underline;font-weight:normal" href="/record/925287/export/xn?ln=sk">NLM</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/925287/export/xw?ln=sk">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:925287/add'); $('#bookmark_sciencewise').bookmark({sites: ['sciencewise']}); $('#bookmark').bookmark({ sites: ['facebook', 'twitter', 'linkedin', 'google_plusone'], icons: '/img/bookmarks.png', url: 'https://cds.cern.ch/record/925287', addEmail: true, title: "Recent Results from the IR Upgrade FEL at Jefferson Lab", description: "After demonstrating 10 kW operation with 1 second pulses, the Jefferson Lab program switched to demonstrating high power operation at short wavelengths using a new 8 cm period wiggler and a THz suppression chicane. 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