Publication:
Clean source of soft X-ray radiation formed in supersonic Ar gas jets by high-contrast femtosecond laser pulses of relativistic intensity

Файлы
W3037491868.pdf(925.24 KB)
Дата
2020
Авторы
Alkhimova, M.
Boldarev, A.
Feng, J.
Lu, X.
Ryazantsev, S.
Skobelev, I.
Pikuz, S.
Journal Title
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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
© 2020 The Author(s).In this work, we optimized a clean, versatile, compact source of soft X-ray radiation with an yield per shot up to in a plasma generated by the interaction of high-contrast femtosecond laser pulses of relativistic intensity with supersonic argon gas jets. Using high-resolution X-ray spectroscopy approaches, the dependence of main characteristics (temperature, density and ionization composition) and the emission efficiency of the X-ray source on laser pulse parameters and properties of the gas medium was studied. The optimal conditions, when the X-ray photon yield reached a maximum value, have been found when the argon plasma has an electron temperature of, an electron density of and an average charge of. In such a plasma, a coefficient of conversion to soft X-ray radiation with energies reaches, and no processes leading to the acceleration of electrons to MeV energies occur. It was found that the efficiency of the X-ray emission of this plasma source is mainly determined by the focusing geometry. We confirmed experimentally that the angular distribution of the X-ray radiation is isotropic, and its intensity linearly depends on the energy of the laser pulse, which was varied in the range of 50-280 mJ. We also found that the yield of X-ray photons can be notably increased by, for example, choosing the optimal laser pulse duration and the inlet pressure of the gas jet.
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Цитирование
Clean source of soft X-ray radiation formed in supersonic Ar gas jets by high-contrast femtosecond laser pulses of relativistic intensity / Alkhimova, M. [et al.] // High Power Laser Science and Engineering. - 2020. - 10.1017/hpl.2020.21
URI
https://www.doi.org/10.1017/hpl.2020.21
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85088392240&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000545649800001
 https://openrepository.mephi.ru/handle/123456789/22096
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