Significant static pressure increase in a precompression cell target for laser-driven advanced dynamic compression experiments

Abstract

Laser shock compression experiments on precompressed samples offer the possibility to explore extreme material states unreachable by static or single-shock compression techniques alone. We have found significant increases in static compression pressure in a wide-opening and thin diamond precompression cell. This suggests that the precompression target is adaptable to advanced coupling techniques with laser-driven dynamic compression methods. The novel coupling techniques proposed give the potential to access outstanding material states required in planetary and condensed-matter physics.

P-ρ-T measurements of H2O up to 260 GPa under laser-driven shock loading

“…A detailed description of the cell was provided in our previous paper. 14 The thicknesses of thin (drive laser side) and thick (diagnostic side) diamonds were between 100 and 250 µm and 1000 µm, respectively. The thickness of the sample chamber was between 70 and 165 µm.…”

“…We also achieved temperature conditions lower than the principal Hugoniot states, which are comparably close to the planetary isentropes, by using the precompression cell applied for laser shock experiments. 14 The dataset of the principal and the off Hugoniot states can clarify the most validated EOS model.…”

Laser-shock compression and Hugoniot measurements of liquid hydrogen to 55 GPa

“…However, the hydrogen temperature must be kept lower because the Hugoniot temperature at this pressure range is too high to reproduce Jupiter's conditions. Therefore off-Hugoniot measurements of hydrogen by means of reflection shocks 13 and/or precompressed samples [38][39][40] will be a quite important next step. …”

Approaching the “cold curve” in laser-driven shock wave experiment of a matter precompressed by a partially perforated diamond anvil

“…Therefore, at the current stage of the available laser facilities, the thickness of the ablated diamond is limited to a few hundred microns (Jeanloz et al, 2007;Loubeyre et al, 2004). Past experiments using such thin diamond films as anvils were limited to static pressures of up to about 5 GPa (Eggert et al, 2008;Henry et al, 2006;Jeanloz et al, 2007;Kimura et al, 2010;Lee et al, 2002;Loubeyre et al, 2004). In a shock experiment with a precompressed sample, the deviation of the final thermodynamic parameters from the principal Hugoniot is related to the extent of the relative initial compression, therefore, at such limited pressure range the experiment is restricted to either fluids that exhibit large compression at this pressure range or to solids which may exhibit large compression at this range through a phase transition.…”

“…In a shock experiment with a precompressed sample, the deviation of the final thermodynamic parameters from the principal Hugoniot is related to the extent of the relative initial compression, therefore, at such limited pressure range the experiment is restricted to either fluids that exhibit large compression at this pressure range or to solids which may exhibit large compression at this range through a phase transition. To the best of our knowledge until now only fluids were investigated using this technique (Henry et al, 2006;Jeanloz et al, 2007;Kimura et al, 2010;Lee et al, 2002;Loubeyre et al, 2004). Higher precompression pressure, in the range of Mbar for instance, will allow the investigation of solids and fluids that transformed to their high pressure metallic state prior to the shocked state (Hemley & Ashcroft, 1998).…”