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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 2015-2022 Generated by JPSP version v=34.4=漏14 Jul 2022 vrws on 2022-07-16 at 16:54" /> <meta name="generator" content="JPSP script name 禄H:/JACoW/JPSP/spmsbatch.pl芦 modification date 禄Sat Jul 16 16:54:33 2022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="Automated Intensity Optimisation Using Reinforcement Learning at LEIR" /> <meta name="citation_author" content="Madysa, Nico" /> <meta name="citation_author" content="Alemany-Fern谩ndez, Reyes" /> <meta name="citation_author" content="Biancacci, Nicolo" /> <meta name="citation_author" content="Goddard, Brennan" /> <meta name="citation_author" content="Kain, Verena" /> <meta name="citation_author" content="Velotti, Francesco" /> <meta name="citation_date" content="2022/07" /> <meta name="citation_publication_date" content="2022/07/01" /> <meta name="citation_publisher" content="JACOW Publishing, Geneva, Switzerland" /> <meta name="citation_firstpage" content="941" /> <meta name="citation_lastpage" content="944" /> <meta name="citation_doi" content="10.18429/JACoW-IPAC2022-TUPOST040" /> <meta name="citation_isbn" content="978-3-95450-227-1" /> <meta name="citation_issn" content="2673-5490" /> <meta name="citation_keywords" content="linac, target, injection, operation, electron" /> <meta name="citation_language" content="en" /> <meta name="citation_conference_title" content="13th International Particle Accelerator Conference (IPAC'22), Bangkok, Thailand, 12-17 June 2022" /> <meta name="citation_pdf_url" content="https://jacow.org/ipac2022/papers/tupost040.pdf" /> <meta name="DC.creator" content="Madysa, Nico" /> <meta name="DC.creator" content="Alemany-Fern谩ndez, Reyes" /> <meta name="DC.creator" content="Biancacci, Nicolo" /> <meta name="DC.creator" content="Goddard, Brennan" /> <meta name="DC.creator" content="Kain, Verena" /> <meta name="DC.creator" content="Velotti, Francesco" /> <meta name="DC.issued" content="2022/07" /> <meta name="dcterms:issued" content="2022" /> <meta name="DC.title" content="Automated Intensity Optimisation Using Reinforcement Learning at LEIR" /> <meta name="DC.publisher" content="JACOW Publishing, Geneva, Switzerland" /> <meta name="DC.citation.spage" content="941" /> <meta name="DC.citation.epage" content="944" /> <meta name="DC:identifier" content="info:doi/10.18429/JACoW-IPAC2022-TUPOST040" /> <meta name="dcterms:isPartOf" content="urn:ISSN:2673-5490" /> <meta name="dcterms:isPartOf" content="urn:ISBN:978-3-95450-227-1" /> <meta name="DC.subject" content="linac, target, injection, operation, electron" /> <meta name="citation_language" content="en" /> <meta name="dcterms:bibliographicCitation" content="13th International Particle Accelerator Conference (IPAC'22), Bangkok, Thailand, 12-17 June 2022" /> <meta name="DC.identifier" content="https://jacow.org/ipac2022/papers/tupost040.pdf" /> <title>DOI - JACoW-IPAC2022-TUPOST040</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/ipac2022/papers/tupost040.pdf">https://doi.org/10.18429/JACoW-IPAC2022-TUPOST040</a></span></div> <div> <table class="doitabledef"> <tr class="tablerow"> <td class="fieldgrp">Title</td> <td class="fieldhigh">Automated Intensity Optimisation Using Reinforcement Learning at LEIR</td> </tr> <tr class="tablerow"> <td class="fieldkey">Authors</td> <td class="datarowleft"> <ul> <li><span class="author_cl"><strong>N. Madysa</strong>, R. Alemany-Fern谩ndez, N. Biancacci, B. Goddard, <span class="tooltip presenter">V. Kain<span class="pr-text presentertxt">presenter</span></span>, F.M. Velotti</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">High intensities in the CERN Low Energy Ion Ring (LEIR) are achieved by stacking up to seven consecutive multi-turn injections from Linac3. Two inclined septa combined with a collapsing horizontal orbit bump allow a 6-D phase space painting via a linearly ramped mean momentum along the Linac3 pulse and injection at high dispersion. The beam is cooled and dragged longitudinally via electron cooling (e-cooling) into a stacking momentum. For optimal accumulation, the electron energy and trajectory need to match the ion energy and orbit at the e-cooler section. In this paper, a reinforcement learning (RL) agent is trained to adjust various e-cooler and Linac3 parameters to maximise the intensity at the end of the injection plateau. Variational Auto-Encoders (VAE) are used to compress longitudinal Schottky spectra into a compact representation as input for the RL agent. The RL agent is pre-trained on a surrogate model of the LEIR e-cooling dynamics, which in turn is learned from the data collected for the training of the VAE. The performance of the VAE, the surrogate model, and the RL agent is investigated in this paper. An overview of planned tests in the upcoming LEIR runs is given.</span> </td> </tr> <tr class="tablerow"> <td class="fieldkey">Paper</td> <td class="datarow">download <a href="https://jacow.org/ipac2022/papers/tupost040.pdf" target="pdf">TUPOST040.PDF</a> [0.278 MB / 4 pages]</td> </tr> <tr class="tablerow"> <td class="fieldkey">Cite</td> <td class="datarow">download ※ <a href="../export/TUPOST040-bib.htm" target="exp">BibTeX</a> ※ <a href="../export/TUPOST040-tex.htm" target="exp"> LaTeX</a> ※ <a href="../export/TUPOST040-txt.htm" target="exp">Text/Word</a> ※ <a href="../export/TUPOST040-ris.htm" target="exp">RIS</a> ※ <a href="../export/TUPOST040.xml" target="exp">EndNote</a></td> </tr> <tr class="tablerow"> <td class="fieldgrp">Conference</td> <td class="fieldhigh"><a href="https://jacow.org/ipac2022/" target="pdf">IPAC2022</a></td> </tr> <tr class="tablerow"> <td class="fieldkey">Series</td> <td class="datarow">International Particle Accelerator Conference (13th)</td> </tr> <tr class="tablerow"> <td class="fieldkey">Location</td> <td class="datarow">Bangkok, Thailand</td> </tr> <tr class="tablerow"> <td class="fieldkey">Date</td> <td class="datarow">12-17 June 2022</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">Frank Zimmermann (CERN, Meyrin, Switzerland); Hitoshi Tanaka (RIKEN, Hyogo, Japan); Porntip Sudmuang (SRLI, Nakhon, Thailand); Prapong Klysubun (SRLI, Nakhon, Thailand); Prapaiwan Sunwong (SRLI, Nakhon, Thailand); Thakonwat Chanwattana (SRLI, Nakhon, Thailand); Christine Petit-Jean-Genaz (CERN, Meyrin, Switzerland); Volker R.W. Schaa (GSI, Darmstadt, Germany)</td> </tr> <tr class="tablerow"> <td class="fieldkey" nowrap>Online ISBN</td> <td class="datarow">978-3-95450-227-1</td> </tr> <tr class="tablerow"> <td class="fieldkey" nowrap>Online ISSN</td> <td class="datarow">2673-5490</td> </tr> <tr class="tablerow"> <td class="fieldkey">Received</td> <td class="datarow">08 June 2022</td> </tr> <tr class="tablerow"> <td class="fieldkey">Revised</td> <td class="datarow">13 June 2022</td> </tr> <tr class="tablerow"> <td class="fieldkey">Accepted</td> <td class="datarow">17 June 2022</td> </tr> <tr class="tablerow"> <td class="fieldkey">Issue Date</td> <td class="datarow">10 July 2022</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-IPAC2022-TUPOST040</span></td> </tr> <tr class="tablerow"> <td class="fieldkey">Pages</td> <td class="datarow">941-944</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/3.0/">Creative Commons Attribution 3.0 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>