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Determining the equation-of-state isentrope in an isochoric heated plasma

M. E. Foord, David B. Reisman, Paul T. Springer

Open publisher page 20 citations

Abstract

A novel method for determining the equation-of-state (EOS) along the release isentrope in an isochoric (constant volume) heated plasma is presented. This approach is demonstrated using simulations of a solid density, 10 eV expanding Al plasma. Determining the material EOS data is validated to pressures near 80 Mbar, much higher than current isentropic compression experiments allow. Limitations at very high temperature (Te⩾100 eV), due to the formation of a radiative conduction layer near the rarefaction interface, are also discussed.

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What this paper is about

A novel method for determining the equation-of-state (EOS) along the release isentrope in an isochoric (constant volume) heated plasma is presented. This approach is demonstrated using simulations of a solid density, 10 eV expanding Al plasma. Determining the material EOS data is validated to pressures near 80 Mbar, much higher than current isentropic compression experiments allow. Limitations at very high temperature (Te⩾100 eV), due to the formation of a radiative conduction layer near the rarefaction interface, are also discussed.

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Available abstract

A novel method for determining the equation-of-state (EOS) along the release isentrope in an isochoric (constant volume) heated plasma is presented. This approach is demonstrated using simulations of a solid density, 10 eV expanding Al plasma. Determining the material EOS data is validated to pressures near 80 Mbar, much higher than current isentropic compression experiments allow. Limitations at very high temperature (Te⩾100 eV), due to the formation of a radiative conduction layer near the rarefaction interface, are also discussed.

Key concepts: Isochoric process, Equation of state, Isentropic process, Plasma, Materials science, Rarefaction (ecology), Thermodynamics, Volume (thermodynamics)

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