Effect of plastic coating on the density of plasma formed in Si foil targets irradiated by ultra-high-contrast relativistic laser pulses

Martynenko, A. S. and Pikuz, S.A. and Skobelev, I. Yu. and Ryazantsev, S. N. and Baird, C. and Booth, N. and Doehl, L. and Durey, P. and Faenov, A. Ya and Farley, D. and Kodama, R. and Lancaster, K. and McKenna, P. and Murphy, C. D. and Spindloe, C. and Pikuz, T. A. and Woolsey, N. (2020) Effect of plastic coating on the density of plasma formed in Si foil targets irradiated by ultra-high-contrast relativistic laser pulses. Physical Review E, 101 (4). 043208. ISSN 2470-0053 (https://doi.org/10.1103/PhysRevE.101.043208)

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Abstract

The formation of high energy density matter occurs in inertial confinement fusion, astrophysical, and geophysical systems. In this context, it is important to couple as much energy as possible into a target while maintaining high density. A recent experimental campaign, using buried layer (or "sandwich" type) targets and the ultrahigh laser contrast Vulcan petawatt laser facility, resulted in 500 Mbar pressures in solid density plasmas (which corresponds to about 4.6×107J/cm3 energy density). The densities and temperatures of the generated plasma were measured based on the analysis of X-ray spectral line profiles and relative intensities.

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