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A proton beam of 400 GeV/c will be delivered in 1 s pulses of 4e13 protons every 7.2 s, amounting to 4e19 protons on target (PoT) per year, with an average thermal power deposition of 305 kW. The experiment requires high-Z and high-density materials and involves challenging thermomechanical conditions; hence, a water-cooled refractory metal core is proposed. To prevent corrosion and erosion, the target materials - tungsten and a molybdenum-based alloy, TZM-, are clad with a tantalum alloy using hot isostatic pressing. To verify the reliability of the target design and manufacturing process, a reduced-scale prototype target was manufactured and irradiated with 2.4e16 PoT in 2018. This paper presents the findings of the post-irradiation examination (PIE) conducted 2.5 years later. The PIE consisted of non-destructive and destructive activities, including film imaging, microscopy, metrology, ultrasonic testing, microstructural analysis, and mechanical and thermal characterization. No irradiation effects resulting from thermal stresses, such as geometrical changes or cracks in the cladding, were observed, and it was determined that the bonding between the core and cladding materials was robust. Moreover, no changes were detected in the microstructures or mechanical properties of the bulk materials. In conclusion, the robustness of the target baseline design and manufacturing process was confirmed, validating its suitability for operating under the desired conditions. Nonetheless, the observed brittleness of sintered tungsten indicates a potential area for improvement to enhance the lifetime of the BDF target. Overall, the examinations provided valuable insights into the performance of the prototype and indicated potential refinements for the future BDF target complex. Griesemer, Tina; Franqueira Ximenes, Rui; Arnau Izquierdo, Gonzalo; Aviles Santillana, Ignacio; Brehm, Thomas; Gallifa Terricabras, Adria; Höll, Stefan; Jacobsson, Richard; Kaiser, Marco; Kuchar, Roman; Pérez Fontenla, Ana Teresa; Rempel, Alexey; Sacristan De Frutos, Oscar; Schienbein, Marcel; Sgobba, Stefano; Calviani, Marco" /> <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="arXiv : Post-irradiation examination of a prototype tantalum-clad target for the Beam Dump Facility at CERN" name="citation_title" /> <meta content="Griesemer, Tina" name="citation_author" /> <meta content="Sacristan De Frutos, Oscar" name="citation_author" /> <meta content="Rempel, Alexey" name="citation_author" /> <meta content="Calviani, Marco" name="citation_author" /> <meta content="Höll, Stefan" name="citation_author" /> <meta content="Brehm, Thomas" name="citation_author" /> <meta content="Arnau Izquierdo, Gonzalo" name="citation_author" /> <meta content="Aviles Santillana, Ignacio" name="citation_author" /> <meta content="Schienbein, Marcel" name="citation_author" /> <meta content="Kaiser, Marco" name="citation_author" /> <meta content="Jacobsson, Richard" name="citation_author" /> <meta content="Pérez Fontenla, Ana Teresa" name="citation_author" /> <meta content="Sgobba, Stefano" name="citation_author" /> <meta content="Kuchar, Roman" name="citation_author" /> <meta content="Franqueira Ximenes, Rui" name="citation_author" /> <meta content="Gallifa Terricabras, Adria" name="citation_author" /> <meta content="2024/10/02" name="citation_publication_date" /> <meta name="citation_online_date" content="2024/10/09"> <meta content="arXiv:2410.01964" name="citation_technical_report_number" /> <meta name="citation_pdf_url" content="https://cds.cern.ch/record/2912895/files/2410.01964.pdf" />  <meta content="Post-irradiation examination of a prototype tantalum-clad target for the Beam Dump Facility at CERN" property="og:title" /> <meta content="arXiv" property="og:title" /> <meta content="website" property="og:type" /> <meta content="https://cds.cern.ch/record/2912895" property="og:url" /> <meta name="twitter:image" content="https://cds.cern.ch/record/2912895/files/Film_Dosimetry_and_BTV_Offset_all.png" /> <meta property="og:image" content="https://cds.cern.ch/record/2912895/files/EBSD_all.png" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2912895/files/EBSD_all.png" /> <meta property="og:image" content="https://cds.cern.ch/record/2912895/files/Film_Dosimetry_and_BTV_Offset_all.png" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2912895/files/Film_Dosimetry_and_BTV_Offset_all.png" /> <meta property="og:image" content="https://cds.cern.ch/record/2912895/files/Discoloration_block.png" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2912895/files/Discoloration_block.png" /> <meta property="og:image" content="https://cds.cern.ch/record/2912895/files/Extrcation_drawing.png" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2912895/files/Extrcation_drawing.png" /> <meta property="og:image" content="https://cds.cern.ch/record/2912895/files/fracture_interfaces_3.png" /> <meta property="og:image:secure_url" content="https://cds.cern.ch/record/2912895/files/fracture_interfaces_3.png" /> <meta content="CERN Document Server" property="og:site_name" /> <meta content="arXiv" property="og:description" /> <meta content="The Beam Dump Facility (BDF) is a planned fixed-target installation in CERN's North Area, set to start operating in 2031. 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No irradiation effects resulting from thermal stresses, such as geometrical changes or cracks in the cladding, were observed, and it was determined that the bonding between the core and cladding materials was robust. Moreover, no changes were detected in the microstructures or mechanical properties of the bulk materials. In conclusion, the robustness of the target baseline design and manufacturing process was confirmed, validating its suitability for operating under the desired conditions. Nonetheless, the observed brittleness of sintered tungsten indicates a potential area for improvement to enhance the lifetime of the BDF target. 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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;"><a href="http://arxiv.org/abs/arXiv:2410.01964">arXiv:2410.01964</a></td></tr> <tr><td class="formatRecordLabel"> Title </td><td style="padding-left:5px;"><b>Post-irradiation examination of a prototype tantalum-clad target for the Beam Dump Facility at CERN</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;"> <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 = "Hide" } else { more.style.display = 'none'; extension.style.display = ''; link.innerHTML = "Show all 16 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=Griesemer%2C%20Tina&ln=en">Griesemer, Tina</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Franqueira%C2%A0Ximenes%2C%20Rui&ln=en">Franqueira Ximenes, Rui</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Arnau%C2%A0Izquierdo%2C%20Gonzalo&ln=en">Arnau Izquierdo, Gonzalo</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Aviles%20Santillana%2C%20Ignacio&ln=en">Aviles Santillana, Ignacio</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Brehm%2C%20Thomas&ln=en">Brehm, Thomas</a> (Erlangen - Nuremberg U.) ; <a href="https://cds.cern.ch/search?f=author&p=Gallifa%20Terricabras%2C%20Adria&ln=en">Gallifa Terricabras, Adria</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=H%C3%B6ll%2C%20Stefan&ln=en">Höll, Stefan</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Jacobsson%2C%20Richard&ln=en">Jacobsson, Richard</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Kaiser%2C%20Marco&ln=en">Kaiser, Marco</a> (Erlangen - Nuremberg U.) ; <a href="https://cds.cern.ch/search?f=author&p=Kuchar%2C%20Roman&ln=en">Kuchar, Roman</a> (Erlangen - Nuremberg U.)<span id="more" style=""> ; <a href="https://cds.cern.ch/search?f=author&p=P%C3%A9rez%C2%A0Fontenla%2C%20Ana%20Teresa&ln=en">Pérez Fontenla, Ana Teresa</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Rempel%2C%20Alexey&ln=en">Rempel, Alexey</a> (Erlangen - Nuremberg U.) ; <a href="https://cds.cern.ch/search?f=author&p=Sacristan%20De%20Frutos%2C%20Oscar&ln=en">Sacristan De Frutos, Oscar</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Schienbein%2C%20Marcel&ln=en">Schienbein, Marcel</a> (Erlangen - Nuremberg U.) ; <a href="https://cds.cern.ch/search?f=author&p=Sgobba%2C%20Stefano&ln=en">Sgobba, Stefano</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Calviani%2C%20Marco&ln=en">Calviani, Marco</a> (CERN)</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>  <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'; 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;">2024-10-02</td></tr> <tr><td class="formatRecordLabel"> Number of pages </td><td style="padding-left:5px;">16</td></tr>  <tr><td class="formatRecordLabel"> Subject category </td><td style="padding-left:5px;">physics.ins-det ; Detectors and Experimental Techniques ; nucl-ex ; Nuclear Physics - Experiment ; hep-ex ; Particle Physics - Experiment ; physics.acc-ph ; Accelerators and Storage Rings</td></tr> <tr><td class="formatRecordLabel"> Abstract </td><td style="padding-left:5px;">The Beam Dump Facility (BDF) is a planned fixed-target installation in CERN's North Area, set to start operating in 2031. A proton beam of 400 GeV/c will be delivered in 1 s pulses of 4e13 protons every 7.2 s, amounting to 4e19 protons on target (PoT) per year, with an average thermal power deposition of 305 kW. The experiment requires high-Z and high-density materials and involves challenging thermomechanical conditions; hence, a water-cooled refractory metal core is proposed. To prevent corrosion and erosion, the target materials - tungsten and a molybdenum-based alloy, TZM-, are clad with a tantalum alloy using hot isostatic pressing. To verify the reliability of the target design and manufacturing process, a reduced-scale prototype target was manufactured and irradiated with 2.4e16 PoT in 2018. This paper presents the findings of the post-irradiation examination (PIE) conducted 2.5 years later. The PIE consisted of non-destructive and destructive activities, including film imaging, microscopy, metrology, ultrasonic testing, microstructural analysis, and mechanical and thermal characterization. No irradiation effects resulting from thermal stresses, such as geometrical changes or cracks in the cladding, were observed, and it was determined that the bonding between the core and cladding materials was robust. Moreover, no changes were detected in the microstructures or mechanical properties of the bulk materials. In conclusion, the robustness of the target baseline design and manufacturing process was confirmed, validating its suitability for operating under the desired conditions. Nonetheless, the observed brittleness of sintered tungsten indicates a potential area for improvement to enhance the lifetime of the BDF target. Overall, the examinations provided valuable insights into the performance of the prototype and indicated potential refinements for the future BDF target complex.</td></tr> <tr><td class="formatRecordLabel"> Other source </td><td style="padding-left:5px;"><a href="http://inspirehep.net/record/2836808">Inspire</a></td></tr> <tr><td class="formatRecordLabel"> Copyright/License </td><td style="padding-left:5px;">preprint: (License: <a href="http://creativecommons.org/licenses/by/4.0/">CC BY 4.0</a>)</td></tr> </table> <br /><div style="max-width:1024px;margin:auto"><div style="overflow-x:auto;display:inline;width:100%;"><a href="/record/2912895/plots#0"><img style="vertical-align:middle;" src="https://cds.cern.ch/record/2912895/files/Extrcation_drawing.png" title=" Schematic of sample extraction from Block~4, showing one microsection (M), and six tensile (T), two shear (S), and six thermal-diffusivity (D) specimens." width="200px"/></a> <a href="/record/2912895/plots#1"><img style="vertical-align:middle;" src="https://cds.cern.ch/record/2912895/files/Discoloration_block.png" title=" Discoloration visible in the beam-impact area observed during the removal of the prototype target." width="200px"/></a> <a href="/record/2912895/plots#2"><img style="vertical-align:middle;" src="https://cds.cern.ch/record/2912895/files/Film_Dosimetry_and_BTV_Offset_all.png" title=" Overview of the beam-impact locations from the film dosimetry and the BTV data with \textcolor{black}{\ding{54}} representing the determined average values and the center of the target block." width="200px"/></a> <a href='/record/2912895/plots'>Show more plots</a></div></div><br /> <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() === "more" ? 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"less" : "more"); }); </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">Back to search</a> </span></div></div> <div class="bottom-left-folded"><div class="recordlastmodifiedbox" style="position:relative;margin-left:1px"> Record created 2024-10-09, last modified 2024-11-11</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"> <div><small class="detailedRecordActions">Fulltext:</small> <br /><a href="/record/2912895/files/2410.01964.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=en&recid=2912895">Add to personal basket</a></li> <li>Export as <a style="text-decoration:underline;font-weight:normal" href="/record/2912895/export/hx?ln=en">BibTeX</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2912895/export/hm?ln=en">MARC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2912895/export/xm?ln=en">MARCXML</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2912895/export/xd?ln=en">DC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2912895/export/xe?ln=en">EndNote</a>,  <a style="text-decoration:underline;font-weight:normal" href="/record/2912895/export/xn?ln=en">NLM</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2912895/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/2410.0196/add'); $('#bookmark_sciencewise').bookmark({sites: ['sciencewise']}); $('#bookmark').bookmark({ sites: ['facebook', 'twitter', 'linkedin', 'google_plusone'], icons: '/img/bookmarks.png', url: 'https://cds.cern.ch/record/2912895', addEmail: true, title: "Post-irradiation examination of a prototype tantalum-clad target for the Beam Dump Facility at CERN", description: "The Beam Dump Facility (BDF) is a planned fixed-target installation in CERN\'s North Area, set to start operating in 2031. A proton beam of 400 GeV/c will be delivered in 1 s pulses of 4e13 protons every 7.2 s, amounting to 4e19 protons on target (PoT) per year, with an average thermal power deposition of 305 kW. The experiment requires high-Z and high-density materials and involves challenging thermomechanical conditions; hence, a water-cooled refractory metal core is proposed. To prevent corrosion and erosion, the target materials - tungsten and a molybdenum-based alloy, TZM-, are clad with a tantalum alloy using hot isostatic pressing. To verify the reliability of the target design and manufacturing process, a reduced-scale prototype target was manufactured and irradiated with 2.4e16 PoT in 2018. This paper presents the findings of the post-irradiation examination (PIE) conducted 2.5 years later. The PIE consisted of non-destructive and destructive activities, including film imaging, microscopy, metrology, ultrasonic testing, microstructural analysis, and mechanical and thermal characterization. No irradiation effects resulting from thermal stresses, such as geometrical changes or cracks in the cladding, were observed, and it was determined that the bonding between the core and cladding materials was robust. Moreover, no changes were detected in the microstructures or mechanical properties of the bulk materials. In conclusion, the robustness of the target baseline design and manufacturing process was confirmed, validating its suitability for operating under the desired conditions. Nonetheless, the observed brittleness of sintered tungsten indicates a potential area for improvement to enhance the lifetime of the BDF target. Overall, the examinations provided valuable insights into the performance of the prototype and indicated potential refinements for the future BDF target complex." }); // ]]> </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> :: <a class="footer" href="https://repository.cern/content-policy" target="_blank">Content Policy</a> :: <a class="footer" href="https://repository.cern/terms" target="_blank">Terms and Conditions</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? 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