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Title: Measurements of the sound velocity of shock-compressed liquid silica to 1100 GPa

Journal Article · · Journal of Applied Physics
DOI: https://doi.org/10.1063/1.4972338 · OSTI ID:1340256
ORCiD logo [1];  [2];  [2];  [3];  [3];  [4];  [5]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Univ. of Rochester, NY (United States). Dept. of Mechanical Engineering
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Univ. of Rochester, NY (United States). Dept. of Physics and Astronomy
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The sound velocity in a shocked material provides information about its off-Hugoniot behavior of a material at high pressures. This information can be used to extend the knowledge gained in Hugoniot experiments and to model the re-shock and release behavior. Silica is one of the most important materials for equation of state studies because of its prevalence in the earth’s interior and the well-defined properties of α-quartz. This paper presents sound velocity measurements of amorphous fused silica over the range 200 to 1100 GPa using laser-driven shocks and an α- quartz standard. These measurements demonstrate the technique proposed by Fratanduono et al [J. Appl. Phys 116, 033517 (2014)] to determine the sound velocity from the arrival of acoustic perturbations. The results compare favorably to the SESAME 7386 equation-of-state table. The Grüneisen parameter was calculated from the sound velocity data and found to be Γ=0.66 ± 0.05 at densities above 6 g/cm3, an increase in precision by a factor of two over previous measurements.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000; NA0001944
OSTI ID:
1340256
Alternate ID(s):
OSTI ID: 1336841
Report Number(s):
SAND-2016-12347J; JAPIAU; 649722; TRN: US1701125
Journal Information:
Journal of Applied Physics, Vol. 120, Issue 23; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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