Polarized angular-dependent reflectivity and density-dependent profiles of shock-compressed xenon plasmas

Y. Zaporozhets, V. Mintsev, V. Fortov, H. Reinholz, G. Röpke, S. Rosmej, and Y. A. Omarbakiyeva
Phys. Rev. E 99, 043202 – Published 3 April 2019

Abstract

New data for the reflectivity of shock-compressed xenon plasmas at pressures of 10–12 GPa at large incident angles are presented. In addition, measurements have been performed at different densities. These data allow to analyze the free-electron density profile across the shock wave front. Assuming a Fermi-like density profile, the width of the front layer is inferred. The reflectivity coefficients for the s- and p-polarized waves are calculated. The influence of atoms, which was taken into account on the level of the collision frequency, proves to be essential for the understanding of the reflection process. Subsequently, a unique density profile is sufficient to obtain good agreement with the experimental data at different incident angles and at all investigated optical laser frequencies. Reflectivity measurements for different densities allow to determine the dependence of shock-front density profiles on the plasma parameters. As a result, it was found that the width of the front layer increases with decreasing density.

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  • Received 26 December 2018

DOI:https://doi.org/10.1103/PhysRevE.99.043202

©2019 American Physical Society

Physics Subject Headings (PhySH)

Plasma Physics

Authors & Affiliations

Y. Zaporozhets, V. Mintsev, and V. Fortov

  • Institute of Problems of Chemical Physics, Chernogolovka, Moscow Reg., 142432 Russia

H. Reinholz

  • University of Western Australia, School of Physics, 35 Stirling Highway, Crawley, Western Australia 6009, Australia and University of Rostock, Institute of Physics, Universitätsplatz 1, D-18051 Rostock, Germany

G. Röpke

  • University of Rostock, Institute of Physics, Universitätsplatz 1, D-18051 Rostock, Germany

S. Rosmej

  • Carl von Ossietzky University of Oldenburg, Institute of Physics, D-26111 Oldenburg, Germany

Y. A. Omarbakiyeva

  • International IT University, 050040, Almaty, Kazakhstan

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Vol. 99, Iss. 4 — April 2019

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