Ramp compression of magnesium oxide to 234 GPa

J. Wang, R. F. Smith, F. Coppari, J. H. Eggert, T. R. Boehly, G. W. Collins, T. S. Duffy

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Single-crystal magnesium oxide (MgO) samples were ramp compressed to above 200 GPa pressure at the Omega laser facility. Multi-stepped MgO targets were prepared using lithography and wet etching techniques. Free surface velocities of ramp-compressed MgO were measured with a VISAR. The sound velocity and stress-density response were determined using an iterative Lagrangian analysis. The measured equation of state is consistent with expectations from previous shock and static data as well as with a recent X-ray diffraction measurement under ramp loading. The peak elastic stresses observed in our samples have amplitudes of 3-5.5 GPa, decreasing with propagation distance.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Wang, J., Smith, R. F., Coppari, F., Eggert, J. H., Boehly, T. R., Collins, G. W., & Duffy, T. S. (2014). Ramp compression of magnesium oxide to 234 GPa. Journal of Physics: Conference Series, 500(PART 6), [062002]. https://doi.org/10.1088/1742-6596/500/6/062002