Analysis of Z-pinch shock wave experiments on meteorite and planetary materials

摘要: Abstract The response of a range meteorite and planetary materials astrophysical science interest to pulsed high-energy-density soft X-ray irradiation from the Sandia National Laboratories Z-pinch accelerator is described. These include selected iron stony meteorites, magnesium-rich olivine (dunite), Al Fe calibration materials. In each experiment, motion rear surface sample was monitored by velocity interferometry. From resulting waveform information about incident pulse, radiation coupling stress waves deduced. primary Planckian stagnation emissions have black body equivalent temperatures in 170–237 eV, with ∼1–10% K-alpha derived pinch material (Cu, Al, Ni or steel). Hohlraum intensities at were 84–316 TW/cm 2 on time scales 3.0 8.2 ns, 43 260 GW/cm positions 7–14 cm away center, assuming an inverse-square radial dependence along line-of-sight distance. This analytically estimated generate target pressure 6.1–12.4 GPa. very short duration loading pulse establishes attenuating shock wave. Consistent measurements targets' surfaces suggest uniform beam the calibration while (inhomogeneous) natural yield Hugoniot pressures considerable variance, as expected. Thusfar we not recovered targets, precluding post-irradiation analysis.