Argon equation of state data to 1 TPa: Shock compression experiments and simulations

Cryogenic liquid noble gases, because of their noble nature and monatomic fluid behavior, are ideal for comparing experiments and theory at high pressures and temperatures. Using both magnetically accelerated flyer plates and laser-driven decaying shocks, the authors obtain here high-precision measurements on shock-compressed liquid argon to 1 TPa. The data are used to calibrate two different EOS models. The results show that even if two models are calibrated to the same data set, they can exhibit different responses at extreme conditions.