Observation of collapsing radiative shocks in laboratory experiments

Physics

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Plasma Production And Heating By Shock Waves And Compression, Shock Waves And Discontinuities, Laser-Plasma Acceleration Of Electrons And Ions, Emission, Absorption, And Scattering Of Electromagnetic Radiation, Laboratory Studies Of Space- And Astrophysical-Plasma Processes, Magnetohydrodynamics And Plasmas

Scientific paper

This article reports the observation of the dense, collapsed layer produced by a radiative shock in a laboratory experiment. The experiment uses laser irradiation to accelerate a thin layer of solid-density material to above 100 km/s, the first to probe such high velocities in a radiative shock. The layer in turn drives a shock wave through a cylindrical volume of Xe gas (at ~6 mg/cm3). Radiation from the shocked Xe removes enough energy that the shocked layer increases in density and collapses spatially. This type of system is relevant to a number of astrophysical contexts, providing the potential to observe phenomena of interest to astrophysics and to test astrophysical computer codes.

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