Two- and Multi-bucket X-ray Free-Electron Laser at LCLS

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Abstract

X-ray Free Electron Lasers provide femtosecond X-ray pulses with narrow bandwidth and unprecedented peak brightness. Special modes of operation have been developed to deliver double pulses for X-ray pump, X-ray probe experiments. However, the longest delay between the two pulses achieved with existing single bucket methods is less than 1 picosecond, thus preventing exploration of longer timescales dynamics. We present a novel Two-bucket scheme covering delays from 350 picoseconds to hundreds of nanoseconds in discrete steps of 350 picoseconds. Performance for each pulse can be similar to the one in single pulse operation. The method has been experimentally tested with LCLS-I and LCLS-II hard x-ray undulators.
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Two- and Multi-bucket X-ray Free-Electron Laser at LCLS | 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 Research Article Two- and Multi-bucket X-ray Free-Electron Laser at LCLS Franz-Josef Decker, Karl L. Bane, William Colocho, Sasha Gilevich, and 8 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-1130076/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 9 You are reading this latest preprint version Abstract X-ray Free Electron Lasers provide femtosecond X-ray pulses with narrow bandwidth and unprecedented peak brightness. Special modes of operation have been developed to deliver double pulses for X-ray pump, X-ray probe experiments. However, the longest delay between the two pulses achieved with existing single bucket methods is less than 1 picosecond, thus preventing exploration of longer timescales dynamics. We present a novel Two-bucket scheme covering delays from 350 picoseconds to hundreds of nanoseconds in discrete steps of 350 picoseconds. Performance for each pulse can be similar to the one in single pulse operation. The method has been experimentally tested with LCLS-I and LCLS-II hard x-ray undulators. Civil Engineering femtosecond bucket methods Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Major revision 22 Dec, 2021 Reviews received at journal 17 Dec, 2021 Reviewers agreed at journal 08 Dec, 2021 Reviewers agreed at journal 06 Dec, 2021 Reviewers invited by journal 06 Dec, 2021 Editor assigned by journal 03 Dec, 2021 Editor invited by journal 03 Dec, 2021 Submission checks completed at journal 03 Dec, 2021 First submitted to journal 01 Dec, 2021 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. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-1130076","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":67804896,"identity":"aa008791-d2ee-41b9-b178-de8f62d317b3","order_by":0,"name":"Franz-Josef Decker","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAABAklEQVRIie3PMUvEMBTA8RcC6fJo19zgd6h0Objj+lUSCrmluLgIChaETHW/D3NgINAuRdfCDVoObrpBtwoiluIJDjnOzSH/ISSP/CAB8Pn+YwbosM4hPAyCAoDDOD1KFLDxJADQnEbsH0hY323jt/VTygL7Qt77xQUG910LVzNZOMikqRK52m2kRhVTFNklYp1MoVk6Sdzm1KLZCAb58BhB5QNXjBNt3eR5T+2HeUxZtAfSi1tZjuTzCGmRZmAM0Twfvi7sNyncZNKo5Lw0mdR8F1tUtSyxolNRLRMXCWu75b1ZpFGUdV0/v5ZloEn7ejM7c5FfmZ+dOOW6z+fz+Zx9AfrmV6kYzYGeAAAAAElFTkSuQmCC","orcid":"","institution":"SLAC National Accelerator Laboratory","correspondingAuthor":true,"submittingAuthor":false,"prefix":"","firstName":"Franz-Josef","middleName":"","lastName":"Decker","suffix":""},{"id":67804897,"identity":"c92feb1c-b444-4017-b506-5885c9180dca","order_by":1,"name":"Karl L. 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