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<!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="keywords" content="doi, conference, proceedings" /> <meta name="generator" content="copyright 2015-2024 Generated by JPSP version v=36.2=(pre 36.2)漏22 Oct 2023 vrws on 2024-04-04 at 18:28" /> <meta name="generator" content="JPSP script name 禄H:/JACoW/JPSP/spmsbatchU.pl芦 modification date 禄Wed Feb 28 15:38:54 2024芦" /> <meta name="author" content="volker rw schaa@gsi de" /> <link rel="stylesheet" href="../html/doi.css" /> <link rel="shortcut icon" href="../im0ges/favicon.ico" /> <link rel="icon" href="../im0ges/favicon_ani.gif" type="image/gif" /> <script src="../html/Hyphenator.js"></script> <script src="../html/en.js"></script> <script type="text/javascript">Hyphenator.config({remoteloading : false}); Hyphenator.run();</script> <meta name="citation_title" content="Mitigating Collimation Impedance and Improving Halo Cleaning with New Optics and Settings Strategy of the HL-LHC Betatron Collimation System" /> <meta name="citation_author" content="Lindstr枚m, Bjorn" /> <meta name="citation_author" content="Bruce, Roderik" /> <meta name="citation_author" content="Buffat, Xavier" /> <meta name="citation_author" content="De Maria, Riccardo" /> <meta name="citation_author" content="Giacomel, Lorenzo" /> <meta name="citation_author" content="Hermes, Pascal" /> <meta name="citation_author" content="Mirarchi, Daniele" /> <meta name="citation_author" content="Mounet, Nicolas" /> <meta name="citation_author" content="Persson, Tobias" /> <meta name="citation_author" content="Redaelli, Stefano" /> <meta name="citation_author" content="Tom谩s Garc铆a, Rogelio" /> <meta name="citation_author" content="Van der Veken, Frederik" /> <meta name="citation_author" content="Wegscheider, Andreas" /> <meta name="citation_date" content="2024/04" /> <meta name="citation_publication_date" content="2024/04/01" /> <meta name="citation_publisher" content="JACOW Publishing, Geneva, Switzerland" /> <meta name="citation_firstpage" content="183" /> <meta name="citation_lastpage" content="187" /> <meta name="citation_doi" content="10.18429/JACoW-HB2023-TUC4C2" /> <meta name="citation_isbn" content="978-3-95450-253-0" /> <meta name="citation_issn" content="2673-5571" /> <meta name="citation_keywords" content="optics, impedance, collimation, simulation, experiment" /> <meta name="citation_language" content="en" /> <meta name="citation_conference_title" content="68th Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB'23), Geneva, Switzerland, 09-13 October 2023" /> <meta name="citation_pdf_url" content="https://jacow.org/hb2023/papers/tuc4c2.pdf" /> <meta name="DC.creator" content="Lindstr枚m, Bjorn" /> <meta name="DC.creator" content="Bruce, Roderik" /> <meta name="DC.creator" content="Buffat, Xavier" /> <meta name="DC.creator" content="De Maria, Riccardo" /> <meta name="DC.creator" content="Giacomel, Lorenzo" /> <meta name="DC.creator" content="Hermes, Pascal" /> <meta name="DC.creator" content="Mirarchi, Daniele" /> <meta name="DC.creator" content="Mounet, Nicolas" /> <meta name="DC.creator" content="Persson, Tobias" /> <meta name="DC.creator" content="Redaelli, Stefano" /> <meta name="DC.creator" content="Tom谩s Garc铆a, Rogelio" /> <meta name="DC.creator" content="Van der Veken, Frederik" /> <meta name="DC.creator" content="Wegscheider, Andreas" /> <meta name="DC.issued" content="2024/04" /> <meta name="dcterms:issued" content="2024" /> <meta name="DC.title" content="Mitigating Collimation Impedance and Improving Halo Cleaning with New Optics and Settings Strategy of the HL-LHC Betatron Collimation System" /> <meta name="DC.publisher" content="JACOW Publishing, Geneva, Switzerland" /> <meta name="DC.citation.spage" content="183" /> <meta name="DC.citation.epage" content="187" /> <meta name="DC:identifier" content="info:doi/10.18429/JACoW-HB2023-TUC4C2" /> <meta name="dcterms:isPartOf" content="urn:ISSN:2673-5571" /> <meta name="dcterms:isPartOf" content="urn:ISBN:978-3-95450-253-0" /> <meta name="DC.subject" content="optics, impedance, collimation, simulation, experiment" /> <meta name="citation_language" content="en" /> <meta name="dcterms:bibliographicCitation" content="68th Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB'23), Geneva, Switzerland, 09-13 October 2023" /> <meta name="DC.identifier" content="https://jacow.org/hb2023/papers/tuc4c2.pdf" /> <title>DOI - JACoW-HB2023-TUC4C2</title> </head> <body> <a href="https://www.jacow.org"><img src="../im0ges/jacowheader.jpg" width="480" height="60" alt="JACoW logo" /></a> <h1>Journals of Accelerator Conferences Website (JACoW)</h1> <p class="intro">'Journal of Accelerator Conferences Website' (<a href="https://www.jacow.org">JACoW</a>) is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.</p> <hr /> <div><span class="doiheader"><a href="https://jacow.org/hb2023/papers/tuc4c2.pdf">https://doi.org/10.18429/JACoW-HB2023-TUC4C2</a></span></div> <div> <table class="doitabledef"> <tr class="tablerow"> <td class="fieldgrp">Title</td> <td class="fieldhigh">Mitigating Collimation Impedance and Improving Halo Cleaning with New Optics and Settings Strategy of the HL-LHC Betatron Collimation System</td> </tr> <tr class="tablerow"> <td class="fieldkey">Authors</td> <td class="datarowleft"> <ul> <li><span class="author_cl"><strong>B. Lindstr枚m</strong>, R. Bruce, X. Buffat, R. De Maria, L. Giacomel, P.D. Hermes, D. Mirarchi, N. Mounet, T.H.B. Persson, S. Redaelli, R. Tom谩s Garc铆a, F.F. Van der Veken, A. Wegscheider</span><br /> CERN, Meyrin, Switzerland</li> </ul> </td> </tr> <tr class="tablerow"> <td class="fieldkey">Abstract</td> <td> <span class="abstract hyphenate jtext" lang="en">With High Luminosity Large Hadron Collider (HL-LHC) beam intensities, there are concerns that the beam losses in the dispersion suppressors around the betatron cleaning insertion might exceed the quench limits. Furthermore, to maximize the beam lifetime it is important to reduce the impedance as much as possible. The collimators constitute one of the main sources of impedance in HL-LHC, given the need to operate with small collimator gaps. To improve this, a new optics was developed which increases the beta function in the collimation area, as well as the single pass dispersion from the primary collimators to the downstream shower absorbers. Other possible improvements from orbit bumps, to further enhance the locally generated dispersion, and from asymmetric collimator settings were also studied. The new solutions were partially tested with 6.8 TeV beams at the LHC in a dedicated machine experiment in 2022. In this paper, the new performance is reviewed and prospects for future operational deployment are discussed.</span> </td> </tr> <tr class="tablerow"> <td class="fieldkey">Funding</td> <td class="datarow">Work supported by the HL-LHC project</td> </tr> <tr class="tablerow"> <td class="fieldkey">Paper</td> <td class="datarow">download <a href="https://jacow.org/hb2023/papers/tuc4c2.pdf" target="pdf">TUC4C2.PDF</a> [3.200 MB / 5 pages]</td> </tr> <tr class="tablerow"> <td class="fieldkey">Slides</td> <td class="datarow">download <a href="https://jacow.org/hb2023/talks/tuc4c2_talk.pdf" target="pdf">TUC4C2_TALK.PDF</a> [2.222 MB]</td> </tr> <tr class="tablerow"> <td class="fieldkey">Cite</td> <td class="datarow">download ※ <a href="../export/TUC4C2-bib.htm" target="exp">BibTeX</a> ※ <a href="../export/TUC4C2-tex.htm" target="exp"> LaTeX</a> ※ <a href="../export/TUC4C2-txt.htm" target="exp">Text/Word</a> ※ <a href="../export/TUC4C2-ris.htm" target="exp">RIS</a> ※ <a href="../export/TUC4C2.xml" target="exp">EndNote</a></td> </tr> <tr class="tablerow"> <td class="fieldgrp">Conference</td> <td class="fieldhigh"><a href="https://jacow.org/hb2023/" target="pdf">HB2023</a></td> </tr> <tr class="tablerow"> <td class="fieldkey">Series</td> <td class="datarow">ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (68th)</td> </tr> <tr class="tablerow"> <td class="fieldkey">Location</td> <td class="datarow">Geneva, Switzerland</td> </tr> <tr class="tablerow"> <td class="fieldkey">Date</td> <td class="datarow">09-13 October 2023</td> </tr> <tr class="tablerow"> <td class="fieldgrp">Publisher</td> <td class="fieldhigh"><a href="https://www.jacow.org" target="pdf">JACoW Publishing, Geneva, Switzerland</a></td> </tr> <tr class="tablerow"> <td class="fieldkey">Editorial Board</td> <td class="datarow">Volker R.W. Schaa (GSI, Darmstadt, Germany); Jan Chrin (PSI, Villigen, Switzerland); Massimo Giovannozzi (CERN, Geneva, Switzerland); Dong Eon Kim (PAL, Pohang, South Korea); Marten H. Koopmans (CERN, Geneva, Switzerland); Anton Lechner (CERN, Geneva, Switzerland); Philippe Schoofs (CERN, Geneva, Switzerland)</td> </tr> <tr class="tablerow"> <td class="fieldkey" nowrap>Online ISBN</td> <td class="datarow">978-3-95450-253-0</td> </tr> <tr class="tablerow"> <td class="fieldkey" nowrap>Online ISSN</td> <td class="datarow">2673-5571</td> </tr> <tr class="tablerow"> <td class="fieldkey">Received</td> <td class="datarow">01 October 2023</td> </tr> <tr class="tablerow"> <td class="fieldkey">Revised</td> <td class="datarow">08 October 2023</td> </tr> <tr class="tablerow"> <td class="fieldkey">Accepted</td> <td class="datarow">11 October 2023</td> </tr> <tr class="tablerow"> <td class="fieldkey">Issued</td> <td class="datarow">28 October 2023</td> </tr> <tr class="tablerow"> <td class="fieldkey">DOI</td> <td class="datarow"><span style="font-family:'Liberation Mono'; font-size:12pt;">doi:10.18429/JACoW-HB2023-TUC4C2</span></td> </tr> <tr class="tablerow"> <td class="fieldkey">Pages</td> <td class="datarow">183-187</td> </tr> <tr class="tablerow"> <td class="fieldkey">Copyright</td> <td class="datarow"> <table> <tr><td><span class="abstract hyphenate jtext" lang="en"><a href="https://creativecommons.org/licenses/by/3.0/"><img alt="Creative Commons CC logo" src="../im0ges/cc.png" style="float: left; margin: 10px" height="30"></a><i>Published by JACoW Publishing under the terms of the <a href="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International</a> license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.</i></span></td> </tr> </table> </td> </table> </div> </body> </html>