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Title: Mechanical and optical response of [100] lithium fluoride to multi-megabar dynamic pressures

Abstract

An understanding of the mechanical and optical properties of lithium fluoride (LiF) is essential to its use as a transparent tamper and window for dynamic materials experiments. In order to improve models for this material, we applied iterative Lagrangian analysis to ten independent sets of data from magnetically driven planar shockless compression experiments on single crystal [100] LiF to pressures as high as 350 GPa. We found that the compression response disagreed with a prevalent tabular equation of state for LiF that is commonly used to interpret shockless compression experiments. We also present complementary data from ab initio calculations performed using the diffusion quantum Monte Carlo method. The agreement between these two data sets lends confidence to our interpretation. In order to aid in future experimental analysis, we have modified the tabular equation of state to match the new data. We have also extended knowledge of the optical properties of LiF via shock-compression and shockless compression experiments, refining the transmissibility limit, measuring the refractive index to ~300 GPa, and confirming the nonlinear dependence of the refractive index on density. Lastly, we present a new model for the refractive index of LiF that includes temperature dependence and describe a procedure formore » correcting apparent velocity to true velocity for dynamic compression experiments.« less

Authors:
 [1];  [2];  [1];  [3]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Washington State Univ., Pullman, WA (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Science (NA-113)
OSTI Identifier:
1335133
Alternate Identifier(s):
OSTI ID: 1330116; OSTI ID: 1345941
Report Number(s):
SAND-2016-10421J; LA-UR-16-26527
Journal ID: ISSN 0021-8979; JAPIAU; 648345
Grant/Contract Number:  
AC04-94AL85000; AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 120; Journal Issue: 16; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE

Citation Formats

Davis, Jean -Paul, Knudson, Marcus D., Shulenburger, Luke, and Crockett, Scott D. Mechanical and optical response of [100] lithium fluoride to multi-megabar dynamic pressures. United States: N. p., 2016. Web. doi:10.1063/1.4965869.
Davis, Jean -Paul, Knudson, Marcus D., Shulenburger, Luke, & Crockett, Scott D. Mechanical and optical response of [100] lithium fluoride to multi-megabar dynamic pressures. United States. doi:10.1063/1.4965869.
Davis, Jean -Paul, Knudson, Marcus D., Shulenburger, Luke, and Crockett, Scott D. Wed . "Mechanical and optical response of [100] lithium fluoride to multi-megabar dynamic pressures". United States. doi:10.1063/1.4965869. https://www.osti.gov/servlets/purl/1335133.
@article{osti_1335133,
title = {Mechanical and optical response of [100] lithium fluoride to multi-megabar dynamic pressures},
author = {Davis, Jean -Paul and Knudson, Marcus D. and Shulenburger, Luke and Crockett, Scott D.},
abstractNote = {An understanding of the mechanical and optical properties of lithium fluoride (LiF) is essential to its use as a transparent tamper and window for dynamic materials experiments. In order to improve models for this material, we applied iterative Lagrangian analysis to ten independent sets of data from magnetically driven planar shockless compression experiments on single crystal [100] LiF to pressures as high as 350 GPa. We found that the compression response disagreed with a prevalent tabular equation of state for LiF that is commonly used to interpret shockless compression experiments. We also present complementary data from ab initio calculations performed using the diffusion quantum Monte Carlo method. The agreement between these two data sets lends confidence to our interpretation. In order to aid in future experimental analysis, we have modified the tabular equation of state to match the new data. We have also extended knowledge of the optical properties of LiF via shock-compression and shockless compression experiments, refining the transmissibility limit, measuring the refractive index to ~300 GPa, and confirming the nonlinear dependence of the refractive index on density. Lastly, we present a new model for the refractive index of LiF that includes temperature dependence and describe a procedure for correcting apparent velocity to true velocity for dynamic compression experiments.},
doi = {10.1063/1.4965869},
journal = {Journal of Applied Physics},
number = 16,
volume = 120,
place = {United States},
year = {2016},
month = {10}
}

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Works referenced in this record:

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