Few-cycle, 100-TW-class laser pulses as efficient sources of nanocoulomb electron bunches and Bremsstrahlung

Few-cycle, 100-TW-class laser pulses as efficient sources of nanocoulomb electron bunches and Bremsstrahlung | 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 Few-cycle, 100-TW-class laser pulses as efficient sources of nanocoulomb electron bunches and Bremsstrahlung Vojtech Horný, Petrisor Bleotu, Daniel Ursescu, Paolo Tomassini This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3856955/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract The state-of-the-art ultrashort, few-cycle laser pulses recently have entered the regime of the 100 TW-class power and at 10 Hz repetition rate. We explore the potential of such pulses for efficient electron acceleration. The numerical modelling predicts that hundreds-MeV, nC-class electron bunches can be generated, transferring up to 58% of the laser pulse energy into electrons above 15 MeV. Furthermore, we exploit such electron bunches for the generation of a secondary source of hard X-ray Bremsstrahlung in a high-Z converter. The results suggest that up to 30% of the laser energy can be transformed into hard X-rays with energy above 10 keV. Such an exceptionally high conversion efficiency is achieved through increased laser-to-electron conversion due to the short duration of the laser pulse and the high energy of the accelerated electrons, where radiation losses in the converter significantly outweigh collisional losses. This Bremsstrahlung emitter could function as a generator of tertiary particles, including neutrons released through photonuclear reactions. Physical sciences/Physics/Plasma physics/Laser-produced plasmas Physical sciences/Physics/Plasma physics/Plasma-based accelerators Full Text Additional Declarations There is NO Competing Interest. Supplementary Files CommPhysv1supplementary.pdf Cite Share Download PDF Status: Posted 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-3856955","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":266727426,"identity":"d30689c9-dae9-4305-a921-2047893dc180","order_by":0,"name":"Vojtech Horný","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA9ElEQVRIiWNgGAWjYHCCBCA+wGAAZlcwyLARoSWxAaHlDAMPMVoYEVoY2xh4CKo3ON7w/MGHmjsM5uy9zx7zzrPh4WPgPfaAcY8Nbi1nDiQ2zjj2jMGy57i5Me+2NKDD+NINGJ6l4dQiOSMhsZm34TCDwY00NmnebYd52OTfmEkwHDiMX8tfuJY5/4G28ODXwi8B1MII19JwgAgtPAcSZ/YcO8xjcOYYm+ScY8kgLeYGCQdw+4WNvSfhw4+aw3IGx9vYJN7U2MnJN/CYPfhwAHeIMTDwJIBJEMEEjRQ2cIrADdgPwJmMP2BaRsEoGAWjYBQgAQCW004pl2Zp1AAAAABJRU5ErkJggg==","orcid":"","institution":"Extreme Light Infrastructure - Nuclear Physics","correspondingAuthor":true,"prefix":"","firstName":"Vojtech","middleName":"","lastName":"Horný","suffix":""},{"id":266727427,"identity":"8f22cc8b-cae3-47d6-985d-b081c2b1a0cf","order_by":1,"name":"Petrisor Bleotu","email":"","orcid":"","institution":"Extreme Light Infrastructure - Nuclear Physics","correspondingAuthor":false,"prefix":"","firstName":"Petrisor","middleName":"","lastName":"Bleotu","suffix":""},{"id":266727428,"identity":"a15e4e60-0caa-4574-b597-cd3010c8f402","order_by":2,"name":"Daniel Ursescu","email":"","orcid":"","institution":"Extreme Light Infrastructure - Nuclear Physics","correspondingAuthor":false,"prefix":"","firstName":"Daniel","middleName":"","lastName":"Ursescu","suffix":""},{"id":266727429,"identity":"1ae803b1-c8f2-4f3e-9a38-2d577dbe97c3","order_by":3,"name":"Paolo Tomassini","email":"","orcid":"","institution":"Extreme Light Infrastructure - Nuclear Physics","correspondingAuthor":false,"prefix":"","firstName":"Paolo","middleName":"","lastName":"Tomassini","suffix":""}],"badges":[],"createdAt":"2024-01-12 12:45:38","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-3856955/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-3856955/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":50037561,"identity":"cf1cba75-b275-478c-b3c1-19caafeb21d4","added_by":"auto","created_at":"2024-01-23 14:40:28","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":2985567,"visible":true,"origin":"","legend":"","description":"","filename":"CommPhysv1.pdf","url":"https://assets-eu.researchsquare.com/files/rs-3856955/v1_covered_680f62c2-06ed-413e-87e0-7320a804b714.pdf"},{"id":49594872,"identity":"efb90ab9-f50c-43df-a015-bab183c1539f","added_by":"auto","created_at":"2024-01-15 02:04:43","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"supplement","size":174521,"visible":true,"origin":"","legend":"\u003cp\u003e\u003cbr\u003e\u003c/p\u003e","description":"","filename":"CommPhysv1supplementary.pdf","url":"https://assets-eu.researchsquare.com/files/rs-3856955/v1/7a67faeda58167f19c8334f6.pdf"}],"financialInterests":"There is \u003cb\u003eNO\u003c/b\u003e Competing Interest.","formattedTitle":"Few-cycle, 100-TW-class laser pulses as efficient sources of nanocoulomb electron bunches and Bremsstrahlung","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"","lastPublishedDoi":"10.21203/rs.3.rs-3856955/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-3856955/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"The state-of-the-art ultrashort, few-cycle laser pulses recently have entered the regime of the 100 TW-class power and at\r\n10 Hz repetition rate. We explore the potential of such pulses for efficient electron acceleration. The numerical modelling\r\npredicts that hundreds-MeV, nC-class electron bunches can be generated, transferring up to 58% of the laser pulse energy\r\ninto electrons above 15 MeV. Furthermore, we exploit such electron bunches for the generation of a secondary source of\r\nhard X-ray Bremsstrahlung in a high-Z converter. The results suggest that up to 30% of the laser energy can be transformed\r\ninto hard X-rays with energy above 10 keV. Such an exceptionally high conversion efficiency is achieved through increased\r\nlaser-to-electron conversion due to the short duration of the laser pulse and the high energy of the accelerated electrons,\r\nwhere radiation losses in the converter significantly outweigh collisional losses. 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