Optics and Spectroscopy
To authors
Spectra of optical harmonics 2 and 3/2 at subrelativistic laser-plasma generation of X-ray radiation
Chaschin M. V.
1, Shcheglov P. A.1, Tausenev A. A.1,2, Nazarov M.M.
1, Gordienko V. M.
2
1National Research Center “Kurchatov Institute”, Moscow, Russia
2Moscow State University, Moscow, Russia
2Moscow State University, Moscow, Russia
Email: chamike12@gmail.com, sheglovpawel@yandex.ru, tausenev.aa19@physics.msu.ru, nazarovmax@mail.ru, v_m_gord@mail.ru
The dependence of the visible spectrum (harmonics 2 and 3/2) and the output of CuKα-alpha X-ray radiation on the energy and duration of subrelativistic intensity femtosecond laser pulse acting on a copper foil is investigated. It was found that for secondary radiation, the determining factor is the energy density, and not the intensity and duration of the pulse. The power-law dependencies of the secondary output radiation on the duration and the pulse energy have a significantly different indicator. The tendencies of changing the shape of the spectrum for regions dominated by various mechanisms of plasma heating are revealed. Keywords: X-ray, second harmonic, harmonic three halves, energy density. DOI: 10.61011/EOS.2023.02.55781.19-23
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