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

Файлы
W4391734933.pdf(8.29 MB)
Дата
2024
Авторы
Cikhardt, J.
Gyrdymov, M.
Zähter, S.
Bukharskii, N. D.
Journal Title
Journal ISSN
Volume Title
Издатель
Научные группы
Организационные подразделения
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Организационная единица
Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
Выпуск журнала
Аннотация
Directed 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.
Описание
Ключевые слова
Betatron , Characterization (materials science) , Laser-Plasma Accelerators , High-Power Lasers , High-Energy Density Plasmas , Ion Acceleration , Plasma acceleration
Цитирование
Characterization 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
URI
https://www.doi.org/10.1063/5.0181119
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85184798176&origin=resultslist
 https://openrepository.mephi.ru/handle/123456789/25798
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