Strong interest in the modeling of planetary interiors, dwarf stars, and the physical conditions necessary to achieve inertial confinement fusion (ICF) have driven attention to the properties of matter at high density, temperature, and pressure (beyond the megabar limit). Extreme states of matter have been studied using gas guns, explosives, and Z-pinches, among other methods (see, e.g., Refs. 1–41. L. V. Al’tshuler, S. B. Kormer, A. A. Bakanova et al., Sov. Phys. JETP 11, 573 (1960).2. K. K. Krupnikov, A. A.