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Characterization of bright betatron radiation generated by direct laser acceleration of electrons in plasma of near critical density

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dc.contributor.authorCikhardt, J.
dc.contributor.authorGyrdymov, M.
dc.contributor.authorZähter, S.
dc.contributor.authorBukharskii, N. D.
dc.contributor.authorБухарский, Николай Дмитриевич
dc.date.accessioned2024-12-04T08:43:04Z
dc.date.available2024-12-04T08:43:04Z
dc.date.issued2024
dc.description.abstractDirected x-rays produced in the interaction of sub-picosecond laser pulses of moderate relativistic intensity with plasma of near-critical density are investigated. Synchrotron-like (betatron) radiation occurs in the process of direct laser acceleration (DLA) of electrons in a relativistic laser channel when the electrons undergo transverse betatron oscillations in self-generated quasi-static electric and magnetic fields. In an experiment at the PHELIX laser system, high-current directed beams of DLA electrons with a mean energy ten times higher than the ponderomotive potential and maximum energy up to 100 MeV were measured at 1019 W/cm2 laser intensity. The spectrum of directed x-rays in the range of 5ў??60 keV was evaluated using two sets of Ross filters placed at 0‚ш and 10‚ш to the laser pulse propagation axis. The differential x-ray absorption method allowed for absolute measurements of the angular-dependent photon fluence. We report 1013 photons/sr with energies andamp;gt;5 keV measured at 0‚ш to the laser axis and a brilliance of 1021 photons sў??1 mmў??2 mradў??2 (0.1%BW)ў??1. The angular distribution of the emission has an FWHM of 14‚шў??16‚ш. Thanks to the ultra-high photon fluence, point-like radiation source, and ultra-short emission time, DLA-based keV backlighters are promising for various applications in high-energy-density research with kilojoule petawatt-class laser facilities.
dc.identifier.citationCharacterization of bright betatron radiation generated by direct laser acceleration of electrons in plasma of near critical density / Cikhardt, J. [et al.] // Matter and Radiation at Extremes. - 2024. - 9. - № 2. - 10.1063/5.0181119
dc.identifier.doi10.1063/5.0181119
dc.identifier.urihttps://www.doi.org/10.1063/5.0181119
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85184798176&origin=resultslist
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/25798
dc.relation.ispartofMatter and Radiation at Extremes
dc.subjectBetatron
dc.subjectCharacterization (materials science)
dc.subjectLaser-Plasma Accelerators
dc.subjectHigh-Power Lasers
dc.subjectHigh-Energy Density Plasmas
dc.subjectIon Acceleration
dc.subjectPlasma acceleration
dc.titleCharacterization of bright betatron radiation generated by direct laser acceleration of electrons in plasma of near critical density
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue2
oaire.citation.volume9
relation.isAuthorOfPublication0075efa9-75fb-458e-8e0f-5fdd00284347
relation.isAuthorOfPublication.latestForDiscovery0075efa9-75fb-458e-8e0f-5fdd00284347
relation.isOrgUnitOfPublicationdcdb137c-0528-46a5-841b-780227a67cce
relation.isOrgUnitOfPublication.latestForDiscoverydcdb137c-0528-46a5-841b-780227a67cce
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