CINXE.COM
TUPS55
<!doctype html> <html lang="en-us"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta name="keywords" content="conference, proceedings"> <meta name="generator" content="JACoW Conference Assembly Tool (CAT)"> <meta name="author" content="fabio.meneghetti@akera.it"> <title> TUPS55 </title> <style type="text/css"> body { --primary-color: #4d788c } .body { opacity: 0 } </style> <script id="src-type" type="application/json"> "doi" </script> <script id="src-prefix" type="application/json"> "../.." </script> <script id="src-logo" type="application/json"> "pdf/IPAC24_logo.png" </script> <script type="application/javascript"> function getPrefix() { return JSON.parse(document.getElementById('src-prefix').textContent); } function getLogo() { return JSON.parse(document.getElementById('src-logo').textContent); } function openUrl(part) { try { window.location = getHref(part); } catch (err) { console.error(err) } return false; } function getHref(part) { return `${part}`.startsWith('http') ? `${part}` : `${getPrefix()}/${part}`; } function trasformLinks() { const links = document.querySelectorAll('a[data-href]'); if (links) { links.forEach(link => { const part = link.getAttribute('data-href'); const href = getHref(part); // console.log(part, getHref(part)); link.href = href; link.removeAttribute('onclick'); link.removeAttribute('data-href'); link.onclick = () => console.log(href); }); } } function loadHeaderLogo() { const logoElement = document.getElementById('logo'); if (logoElement) { logoElement.src = `${getPrefix()}/${getLogo()}`; } } function loadLeftPartial(element, name) { if (element) { Promise.resolve().then(() => { return element.innerHTML = `<div class="title">Loading...</div>`; }).then(() => { return fetch(`${getPrefix()}/html/${name}`); }).then(res => { return res.text(); }).then(text => { return element.innerHTML = text; }).then(() => { trasformLinks(); }).catch(err => { console.error(err); return element.innerHTML = '<div class="title">Error loading partial.</div>'; }) } } </script> </head> <body class="body"> <div class="menu"> <div class="logo"> <a data-href="index.html" onclick="openUrl('index.html')" href="javascript:void(0);"> <img id="logo" alt="conference logo icon" alt="IPAC'24 Proceedings — Nashville, TN" /> </a> </div> <div class="title"> IPAC'24 - Proceedings<br />Nashville, TN<br /> </div> <div class="nav"> <a data-href="index.html" onclick="openUrl('index.html')" href="javascript:void(0);">Home</a> — <a data-href="session/index.html" onclick="openUrl('session/index.html')" href="javascript:void(0);">Session</a> — <a data-href="classification/index.html" onclick="openUrl('classification/index.html')" href="javascript:void(0);">Classification</a> — <a data-href="author/index.html" onclick="openUrl('author/index.html')" href="javascript:void(0);">Authors</a> <br> <a data-href="institute/index.html" onclick="openUrl('institute/index.html')" href="javascript:void(0);">Institutes</a> — <a data-href="doi_per_institute/index.html" onclick="openUrl('doi_per_institute/index.html')" href="javascript:void(0);">DOI of Institutes</a> — <a data-href="keyword/index.html" onclick="openUrl('keyword/index.html')" href="javascript:void(0);">Keywords</a> </div> </div> <div class="content"> <div class="full"> <div class="title"> <div class="name"> <b>Journals of Accelerator Conferences Website (JACoW)</b> </div> </div> <br> <div class="doi-intro"> <a href="https://www.jacow.org" target="_blank">JACoW</a> is a publisher in Geneva, Switzerland that publishes the proceedings of accelator conferences held around the world by an international collaboration of editors. </div> <br> <div class="contrib"> <table><tbody><tr class=doi-title><th>URL<td>https://doi.org/10.18429/JACoW-IPAC2024-TUPS55<tr class=doi-title><th>Title<td>Slow extracted spill ripple control in the CERN SPS using adaptive Bayesian optimisation<tr class=doi-authors><th>Authors<td><ul><li><b>V. Kain,</b> E. Effinger, F. Follin, F. Velotti, M. Fraser <br> European Organization for Nuclear Research<li>M. Schenk <br> Ecole Polytechnique Fédérale de Lausanne<li>N. Madysa <br> GSI Helmholtzzentrum für Schwerionenforschung GmbH<li>P. Arrutia Sota <br> Oxford University</ul><tr class=doi-abstract><th>Abstract<td>The CERN Super Proton Synchrotron (SPS) offers slow-extracted, high-intensity proton beams at 400 GeV/c for 3 fixed targets in the CERN North Experimental Area (NA) with a spill length of about 5 seconds. Since first commissioning in the late seventies, the NA has seen a steady increase in users, many of which requiring improved spill quality control. Slow extraction is sensitive to small perturbations with the effect of reduced spill quality. While some of these effects have been addressed in recent years, continuous compensation of intensity fluctuations at 50 Hz harmonics originating from power converter ripple has been particularly difficult to achieve. In 2023, the deployment of two techniques - "Empty-Bucket Channeling" and active control with Adaptive Bayesian Optimization – resulted in a significant suppression of these intensity modulations. This paper focuses on using Adaptive Bayesian Optimization for 50 Hz harmonic control. The chosen algorithm is described, together with details of integration in the CERN control system. The 2023 results are presented and complemented with an overview of the next steps.<tr class=doi-paper><th>Paper<td>download: <a data-href=pdf/TUPS55.pdf download href=javascript:void(0); onclick=openUrl(`pdf/TUPS55.pdf`)>TUPS55.pdf</a><tr class=doi-cite><th>Cite<td><a data-href=reference/tups55-bibtex/index.html href=javascript:void(0); onclick=openUrl(`reference/tups55-bibtex/index.html`)>BibTeX</a>, <a data-href=reference/tups55-latex/index.html href=javascript:void(0); onclick=openUrl(`reference/tups55-latex/index.html`)>LaTeX</a>, <a data-href=reference/tups55-word/index.html href=javascript:void(0); onclick=openUrl(`reference/tups55-word/index.html`)>Text/Word</a>, <a data-href=reference/tups55-ris/index.html href=javascript:void(0); onclick=openUrl(`reference/tups55-ris/index.html`)>RIS</a>, <a data-href=reference/tups55-endnote/index.html href=javascript:void(0); onclick=openUrl(`reference/tups55-endnote/index.html`)>EndNote</a><tr class=doi-conference><th>Conference<td>15th International Particle Accelerator Conference<tr class=doi-series><th>Series<td><tr class=doi-location><th>Location<td>Nashville, TN<tr class=doi-date><th>Date<td>19-24 May 2024<tr class=doi-publisher><th>Publisher<td>JACoW Publishing, Geneva, Switzerland<tr class=doi-editorial-board><th>Editorial Board<td>Fulvia Pilat - Oak Ridge National Laboratory Wolfram Fischer - Brookhaven National Laboratory Robert Saethre - Oak Ridge National Laboratory Petr Anisimov - Los Alamos National Laboratory Ivan Andrian - Elettra-Sincrotrone Trieste S.C.p.A.<tr class=doi-isbn><th>Online ISBN<td>978-3-95450-247-9<tr class=doi-issn><th>Online ISSN<td>2673-5490<tr class=doi-received><th>Received<td>15 May 2024<tr class=doi-received><th>Revised<td>20 May 2024<tr class=doi-accepted><th>Accepted<td>22 May 2024<tr class=doi-issued><th>Issued<td>01 July 2024<tr class=doi-doi><th>DOI<td>10.18429/JACoW-IPAC2024-TUPS55<tr class=doi-pages><th>Pages<td>1790-1793<tr class=doi-copyright><th>Copyright<td><i> Published by JACoW Publishing under the terms of the <a href=https://creativecommons.org/licenses/by/4.0/> Creative Commons Attribution 4.0</a> license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. </i></table> </div> </div> </div> <script type="application/javascript"> document.addEventListener("DOMContentLoaded", function () { document.head.appendChild( Object.assign(document.createElement('link'), { rel: `stylesheet`, href: `${getPrefix()}/css/style.css` }) ); loadHeaderLogo(); trasformLinks(); }); </script> </body> </html>