Enhanced gamma-ray betatron radiation from laser accelerator and plasma radiator

Enhanced gamma-ray betatron radiation from laser accelerator and plasma radiator | 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 Enhanced gamma-ray betatron radiation from laser accelerator and plasma radiator Hyung Taek Kim, Mohammad Mirzaie, Ki Hong Pae, Calin Hojbota, and 14 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7559872/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted You are reading this latest preprint version Abstract A compact source of high-energy femtosecond photons stands as a transformative tool across diverse fields, attainable through betatron radiation generated in the laser wakefield acceleration process. The concurrent pursuit of photon energy and flux confronts a critical challenge, arising from the intrinsic discrepancy between the acceleration and radiation processes. To address this, we demonstrate a hybrid betatron scheme, driven by multi-petawatt laser pulses, using a two-stage gas medium to decouple acceleration from radiation. A low-density medium enables efficient acceleration, followed by a high-density plasma that markedly enhances betatron flux and photon energy. It yields gamma-ray pulses with a brilliance of ~5×10²⁴ photons∙s⁻¹∙mm⁻²∙mrad⁻²∙0.1%-BW at 180 keV, applied to radiography of a complex metallic structure. Particle-in-cell simulations confirm that the dense radiator stage efficiently converts high-energy electrons into high-brightness gamma rays. These results establish a simple, scalable route to compact, ultrabright betatron gamma-ray sources, opening new opportunities in photon-driven science and technology. Physical sciences/Physics/Plasma physics/Plasma-based accelerators Physical sciences/Physics/Plasma physics/Laser-produced plasmas Physical sciences/Optics and photonics/Optical physics/X-rays Full Text Additional Declarations There is NO Competing Interest. Supplementary Files hybridbetatronSIFinal.pdf Supplementary Cite Share Download PDF Status: Under Review Version 1 posted 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-7559872","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":529285602,"identity":"ee8b01f7-a51c-4e79-a2f1-8a85de5164a5","order_by":0,"name":"Hyung Taek 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