Ramp compression of magnesium oxide to 234 GPa

Journal Article · Wed May 07 00:00:00 EDT 2014 · Journal of Physics. Conference Series (Online)

DOI:https://doi.org/10.1088/1742-6596/500/6/062002· OSTI ID:1337782

Wang, Jue ^[1]; Smith, R. F. ^[2]; Coppari, F. ^[2]; Eggert, J. H. ^[2]; Boehly, T. R. ^[3]; Collins, G. W. ^[2]; Duffy, T. S. ^[1]

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1. Princeton Univ., Princeton, NJ (United States)
2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
3. Univ. of Rochester, Rochester, NY (United States)

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 had amplitudes of 3-5.5 GPa, decreasing with propagation distance.

• Research Organization: Princeton Univ., NJ (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: NA0002154
• OSTI ID: 1337782
• Journal Information: Journal of Physics. Conference Series (Online), Vol. 500, Issue 6; ISSN 1742-6596
• Publisher: Institute of Physics (IOP)
• Country of Publication: United States
• Language: English

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