Publication:
Absolute keV x-ray yield and conversion efficiency in over dense Si sub-petawatt laser plasma

Дата
2022
Авторы
Ryazantsev, S. N.
Martynenko, A. S.
Sedov, M. V.
Skobelev, I. Y.
Pikuz, S. A.
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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
Laser-produced plasmas are bright, short sources of X-rays often used for time-resolved imaging and spectroscopy. Absolute measurement requires accurate knowledge of laser-to-x-ray conversion efficiencies, spectrum, photon yield and angular distribution. Here we report on soft X-ray emission from a thin Si foil irradiated by a sub-PW picosecond laser pulse. These absolute measurements cover a continuous and broad spectral range that extends from 4.75 to 7.5 Angstroms (1.7-2.6 keV). The X-ray spectrum consists of spectral line transitions from highly charged ions and broadband emission with contributions from recombination, and free-free processes that occur as electrons decelerate in plasma electromagnetic fields. These quantitative measurements are compared to particle-in-cell simulations allowing us to distinguish bremsstrahlung and synchrotron contributions to the free-free emission. We found that experiment and simulation estimations of laser-to-bremsstrahlung conversion efficiency are in a good agreement. This agreement illustrates the accuracy of experiment and physical interpretation of the measurements.
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Цитирование
Absolute keV x-ray yield and conversion efficiency in over dense Si sub-petawatt laser plasma / Ryazantsev, S.N. [et al.] // Plasma Physics and Controlled Fusion. - 2022. - 64. - № 10. - 10.1088/1361-6587/ac8b33
URI
https://www.doi.org/10.1088/1361-6587/ac8b33
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85138195126&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000851264500001
 https://openrepository.mephi.ru/handle/123456789/27469
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