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Title: Temperature measurements of shocked silica aerogel foam

Abstract

We present recent results of equation-of-state (EOS) measurements of shocked silica (SiO2) aerogel foam at the OMEGA laser facility. Silica aerogel is an important low-density pressure standard used in many high energy density experiments, including the novel technique of shock and release. Due to its many applications, it has been a heavily studied material and has a well-known Hugoniot curve. This work then complements the velocity and pressure measurements with additional temperature data providing the full EOS information within the warm dense matter regime for the temperature interval of 1–15 eV and shock velocities between 10 and 40 km/s corresponding to shock pressures of 0.3–2 Mbar. The experimental results were compared with hydrodynamic simulations and EOS models. We found that the measured temperature was systematically lower than suggested by theoretical calculations. As a result, simulations provide a possible explanation that the emission measured by optical pyrometry comes from a radiative precursor rather than from the shock front, which could have important implications for such measurements.

Authors:
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Rochester, Rochester, NY (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1238619
Alternate Identifier(s):
OSTI ID: 1180605
Report Number(s):
LA-UR-13-29527
Journal ID: ISSN 1539-3755; PLEEE8
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Additional Journal Information:
Journal Volume: 90; Journal Issue: 3; Journal ID: ISSN 1539-3755
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Falk, K., McCoy, C. A., Fryer, C. L., Greeff, C. W., Hungerford, A. L., Montgomery, D. S., Schmidt, D. W., Sheppard, D. G., Williams, J. R., Boehly, T. R., and Benage, J. F. Temperature measurements of shocked silica aerogel foam. United States: N. p., 2014. Web. doi:10.1103/PhysRevE.90.033107.
Falk, K., McCoy, C. A., Fryer, C. L., Greeff, C. W., Hungerford, A. L., Montgomery, D. S., Schmidt, D. W., Sheppard, D. G., Williams, J. R., Boehly, T. R., & Benage, J. F. Temperature measurements of shocked silica aerogel foam. United States. https://doi.org/10.1103/PhysRevE.90.033107
Falk, K., McCoy, C. A., Fryer, C. L., Greeff, C. W., Hungerford, A. L., Montgomery, D. S., Schmidt, D. W., Sheppard, D. G., Williams, J. R., Boehly, T. R., and Benage, J. F. Fri . "Temperature measurements of shocked silica aerogel foam". United States. https://doi.org/10.1103/PhysRevE.90.033107. https://www.osti.gov/servlets/purl/1238619.
@article{osti_1238619,
title = {Temperature measurements of shocked silica aerogel foam},
author = {Falk, K. and McCoy, C. A. and Fryer, C. L. and Greeff, C. W. and Hungerford, A. L. and Montgomery, D. S. and Schmidt, D. W. and Sheppard, D. G. and Williams, J. R. and Boehly, T. R. and Benage, J. F.},
abstractNote = {We present recent results of equation-of-state (EOS) measurements of shocked silica (SiO2) aerogel foam at the OMEGA laser facility. Silica aerogel is an important low-density pressure standard used in many high energy density experiments, including the novel technique of shock and release. Due to its many applications, it has been a heavily studied material and has a well-known Hugoniot curve. This work then complements the velocity and pressure measurements with additional temperature data providing the full EOS information within the warm dense matter regime for the temperature interval of 1–15 eV and shock velocities between 10 and 40 km/s corresponding to shock pressures of 0.3–2 Mbar. The experimental results were compared with hydrodynamic simulations and EOS models. We found that the measured temperature was systematically lower than suggested by theoretical calculations. As a result, simulations provide a possible explanation that the emission measured by optical pyrometry comes from a radiative precursor rather than from the shock front, which could have important implications for such measurements.},
doi = {10.1103/PhysRevE.90.033107},
journal = {Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics},
number = 3,
volume = 90,
place = {United States},
year = {Fri Sep 12 00:00:00 EDT 2014},
month = {Fri Sep 12 00:00:00 EDT 2014}
}

Journal Article:

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Cited by: 22 works
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