Equation-of-state, sound speed, and reshock of shock-compressed fluid carbon dioxide

Mechanical equation-of-state data of initially liquid and solid CO2 shock-compressed to terapascal conditions are reported. Diamond-sapphire anvil cells were used to vary the initial density and state of CO2 samples that were then further compressed with laser-driven shock waves, resulting in a data...

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Veröffentlicht in:Physics of plasmas 2021-02, Vol.28 (2)
Hauptverfasser: Crandall, L. E., Rygg, J. R., Spaulding, D. K., Huff, M. F., Marshall, M. C., Polsin, D. N., Jeanloz, R., Boehly, T. R., Zaghoo, M., Henderson, B. J., Brygoo, S., Celliers, P. M., Eggert, J. H., Fratanduono, D. E., Lazicki, A., Millot, M., Collins, G. W.
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Sprache:eng
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Zusammenfassung:Mechanical equation-of-state data of initially liquid and solid CO2 shock-compressed to terapascal conditions are reported. Diamond-sapphire anvil cells were used to vary the initial density and state of CO2 samples that were then further compressed with laser-driven shock waves, resulting in a data set from which precise derivative quantities, including Grüneisen parameter and sound speed, are determined. Reshock states are measured to 800 GPa and map the same pressure-density conditions as the single shock using different thermodynamic paths. The compressibility data reported here do not support current density-functional-theory calculations, but are better represented by tabular equation-of-state models.
ISSN:1070-664X
1089-7674
DOI:10.1063/5.0039967