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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

Research output: Contribution to journalConference articlepeer-review

Abstract

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

  • General Physics and Astronomy

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