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DOI - JACoW-IPAC2018-THPAF053
<!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 2015-2018 Generated by JPSP version v=28.0=c 01 Aug 2018 vrws on 2018-08-05 at 14:42" /> <meta name="author" content="volker rw schaa@gsi de" /> <link rel="stylesheet" type="text/css" 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" type="text/javascript"></script> <script src="../html/en.js" type="text/javascript"></script> <script type="text/javascript">Hyphenator.config({remoteloading : false}); Hyphenator.run();</script> <meta name="citation_author" content="Repond, Jo毛l" /> <meta name="citation_author" content="Damerau, Heiko" /> <meta name="citation_author" content="Lasheen, Alexandre" /> <meta name="citation_author" content="Shaposhnikova, Elena" /> <meta name="citation_date" content="2018/06" /> <meta name="citation_publication_date" content="2018/06/01" /> <meta name="citation_title" content="Lower-Harmonic RF System in the CERN SPS" /> <meta name="citation_publisher" content="JACOW Publishing, Geneva, Switzerland" /> <meta name="citation_firstpage" content="3087" /> <meta name="citation_lastpage" content="3090" /> <meta name="citation_doi" content="10.18429/JACoW-IPAC2018-THPAF053" /> <meta name="citation_isbn" content="978-3-95450-184-7" /> <meta name="citation_keywords" content="emittance, impedance, simulation, cavity, proton" /> <meta name="citation_language" content="en" /> <meta name="citation_conference_title" content="9th Int. Particle Accelerator Conf. (IPAC'18), Vancouver, BC, Canada, April 29-May 4, 2018" /> <meta name="citation_pdf_url" content="http://jacow.org/ipac2018/papers/thpaf053.pdf" /> <meta name="DC.creator" content="Repond, Jo毛l" /> <meta name="DC.creator" content="Damerau, Heiko" /> <meta name="DC.creator" content="Lasheen, Alexandre" /> <meta name="DC.creator" content="Shaposhnikova, Elena" /> <meta name="DC.issued" content="meta_cit_date" /> <meta name="dcterms:issued" content="2018" /> <meta name="DC.title" content="Lower-Harmonic RF System in the CERN SPS" /> <meta name="DC.publisher" content="JACOW Publishing, Geneva, Switzerland" /> <meta name="DC.citation.spage" content="3087" /> <meta name="DC.citation.epage" content="3090" /> <meta name="DC:identifier" content="info:doi/10.18429/JACoW-IPAC2018-THPAF053" /> <meta name="dcterms:isPartOf" content="urn:ISBN:978-3-95450-184-7" /> <meta name="DC.subject" content="emittance, impedance, simulation, cavity, proton" /> <meta name="citation_language" content="en" /> <meta name="dcterms:bibliographicCitation" content="9th Int. Particle Accelerator Conf. (IPAC'18), Vancouver, BC, Canada, April 29-May 4, 2018" /> <meta name="DC.identifier" content="http://jacow.org/ipac2018/papers/thpaf053.pdf" /> <title>DOI - JACoW-IPAC2018-THPAF053</title> </head> <body> <a href="http://jacow.org"><img src="../im0ges/jacowheader.jpg" width="480" height="60" alt="JACoW logo" /></a> <h1>Joint Accelerator Conferences Website</h1> <p class="intro">The Joint Accelerator Conferences Website (<a href="http://jacow.org">JACoW</a>) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.</p> <hr /> <div><span class="doiheader"><a href="http://jacow.org/ipac2018/papers/thpaf053.pdf">https://doi.org/10.18429/JACoW-IPAC2018-THPAF053</a></span></div> <div> <table class="doitabledef"> <tr class="tablerow"> <td class="fieldgrp">Title</td> <td class="fieldhigh">Lower-Harmonic RF System in the CERN SPS</td> </tr> <tr class="tablerow"> <td class="fieldkey">Authors</td> <td class="datarow"> <ul> <li><span class="author_cl"><strong>J. Repond</strong>, H. Damerau, <span class="tooltip presenter">A. Lasheen<span class="pr-text presentertxt">presenter</span></span>, E.N. Shaposhnikova</span><br /> CERN, Geneva, Switzerland</li> </ul> </td> </tr> <tr class="tablerow"> <td class="fieldkey">Abstract</td> <td> <span class="abstract hyphenate jtext" lang="en">Significant beam losses increasing with intensity are observed at capture and along the SPS flat bottom for the LHC-type proton beam. The intensity should be doubled for HL-LHC and high losses may be a major performance limitation. Bunches extracted from the PS, the SPS injector, are produced in a 40 MHz RF system applying a bunch rotation at the end of the cycle and therefore cannot be perfectly matched to the 200 MHz SPS RF bucket. The possibility of using a lower harmonic additional RF capture system in the SPS was already proposed after the LEP era in preparation for transfer of the LHC beam but the bunch rotation was the preferred solution, since the induced voltage in the SPS 200 MHz RF system would be too large to ensure stability in a low harmonic system without mitigation measures. However, the use of the upgraded one-turn feedback and the 200 MHz RF system as a Landau cavity could help to improve stability. The feasibility of this scenario to reduce capture losses in the SPS is analysed and presented in this paper. The choice of an optimum RF frequency and voltage is also discussed. The transfer to the main 200 MHz is simulated using a realistic bunch distribution.</span> </td> </tr> <tr class="tablerow"> <td class="fieldkey">Paper</td> <td class="datarow">download <a href="http://jacow.org/ipac2018/papers/thpaf053.pdf" target="pdf">THPAF053.PDF</a> [0.492 MB / 4 pages]</td> </tr> <tr class="tablerow"> <td class="fieldkey">Export</td> <td class="datarow">download ※ <a href="../export/THPAF053-bib.htm" target="exp">BibTeX</a> ※ <a href="../export/THPAF053-tex.htm" target="exp"> LaTeX</a> ※ <a href="../export/THPAF053-txt.htm" target="exp">Text/Word</a> ※ <a href="../export/THPAF053-ris.htm" target="exp">RIS</a> ※ <a href="../export/THPAF053.xml" target="exp">EndNote</a></td> </tr> <tr class="tablerow"> <td class="fieldgrp">Conference</td> <td class="fieldhigh">IPAC2018, Vancouver, BC, Canada</td> </tr> <tr class="tablerow"> <td class="fieldkey">Series</td> <td class="datarow">International Particle Accelerator Conference (9th)</td> </tr> <tr class="tablerow"> <td class="fieldkey">Proceedings</td> <td class="datarow">Link to full <a href="http://jacow.org/ipac2018/" target="pdf">IPAC2018 Proccedings</a></td> </tr> <tr class="tablerow"> <td class="fieldkey">Session</td> <td class="datarow">MC5 Poster Session</td> </tr> <tr class="tablerow"> <td class="fieldkey">Date</td> <td class="datarow">03-May-18 09:00–12:00</td> </tr> <tr class="tablerow"> <td class="fieldkey">Main Classification</td> <td class="datarow">05 Beam Dynamics and EM Fields</td> </tr> <tr class="tablerow"> <td class="fieldkey">Sub Classification</td> <td class="datarow">D05 Coherent and Incoherent Instabilities - Theory, Simulations, Code Developments</td> </tr> <tr class="tablerow"> <td class="fieldkey">Keywords</td> <td class="datarow">emittance, impedance, simulation, cavity, proton</td> </tr> <tr class="tablerow"> <td class="fieldgrp">Publisher</td> <td class="fieldhigh">JACoW Publishing, Geneva, Switzerland</td> </tr> <tr class="tablerow"> <td class="fieldkey">Editors</td> <td class="datarow">Shane Koscielniak (TRIUMF, Vancouver, BC, Canada); Todd Satogata (JLab, Newport News, VA, USA); Volker RW Schaa (GSI, Darmstadt, Germany); Jana Thomson (TRIUMF, Vancouver, BC, Canada)</td> </tr> <tr class="tablerow"> <td class="fieldkey">ISBN</td> <td class="datarow">978-3-95450-184-7</td> </tr> <tr class="tablerow"> <td class="fieldkey">Published</td> <td class="datarow">June 2018</td> </tr> <tr class="tablerow"> <td class="fieldkey">Copyright</td> <td class="datarow"> <table> <tr><td>Copyright © 2018 by JACoW, Geneva, Switzerland</td><td> </td> <td rowspan="2"><img src="../im0ges/ccby-88x31.png" width="88" height="31" alt="CC-BY Creative Commons License" /></td> </tr> <tr><td>cc <a href="https://creativecommons.org/licenses/by/3.0/">Creative Commons Attribution 3.0</a></td><td> </td> </tr> </table> </td> </table> </div> </body> </html>