Depth-resolved Characterization of Meissner Screening Breakdown in Surface Treated Niobium

Depth-resolved Characterization of Meissner Screening Breakdown in Surface Treated Niobium | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Depth-resolved Characterization of Meissner Screening Breakdown in Surface Treated Niobium Edward Thoeng, Md. Asaduzzaman, Philipp Kolb, Ryan M. L. McFadden, and 11 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4402391/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 14 Sep, 2024 Read the published version in Scientific Reports → Version 1 posted 12 You are reading this latest preprint version Abstract We report direct measurements of the magnetic field screening at the limits of the Meissner phase for two superconducting Nb samples. The samples are processed with two different surface treatments that have been developed for superconducting radio-frequency cavity applications — a “baseline” treatment and an oxygen-doping (“O-doping” ) treatment. The measurements show: 1) that the screening length is significantly longer in the “O-doping” sample compared to the “baseline” sample; 2) that the screening length near the limits of the Meissner phase increases with applied field; 3) the evolution of the screening profile as the material transitions from the Meissner phase to the mixed phase; and 4) a demonstration of the absence of any screening profile for the highest applied field, indicative of the full flux entering the sample. Measurements are performed utilizing the β -detected nuclear magnetic resonance (β -NMR) technique that allows depth resolved studies of the local magnetic field within the first 100 nm of the surface. The study takes advantage of the β -SRF beamline, a new facility at TRIUMF, Canada, where field levels up to 200 mT are available parallel to the sample surface to replicate radio frequency (RF) fields near the Meissner breakdown limits of Nb. Physical sciences/Physics/Applied physics Physical sciences/Physics/Condensed matter physics Physical sciences/Materials science/Condensed matter physics Full Text Additional Declarations No competing interests reported. Supplementary Files NatureScientificReportSupplementaryInformation.zip Cite Share Download PDF Status: Published Journal Publication published 14 Sep, 2024 Read the published version in Scientific Reports → Version 1 posted Editorial decision: Revision requested 12 Aug, 2024 Reviews received at journal 09 Aug, 2024 Reviewers agreed at journal 15 Jul, 2024 Reviews received at journal 03 Jul, 2024 Reviewers agreed at journal 18 Jun, 2024 Reviewers agreed at journal 01 Jun, 2024 Reviewers agreed at journal 25 May, 2024 Reviewers invited by journal 20 May, 2024 Editor assigned by journal 20 May, 2024 Editor invited by journal 14 May, 2024 Submission checks completed at journal 14 May, 2024 First submitted to journal 10 May, 2024 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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The samples are processed with two different surface treatments that have been developed for superconducting radio-frequency cavity applications — a “baseline” treatment and an oxygen-doping (“O-doping” ) treatment. The measurements show: 1) that the screening length is significantly longer in the “O-doping” sample compared to the “baseline” sample; 2) that the screening length near the limits of the Meissner phase increases with applied field; 3) the evolution of the screening profile as the material transitions from the Meissner phase to the mixed phase; and 4) a demonstration of the absence of any screening profile for the highest applied field, indicative of the full flux entering the sample. Measurements are performed utilizing the β -detected nuclear magnetic resonance (β -NMR) technique that allows depth resolved studies of the local magnetic field within the first 100 nm of the surface. 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