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Title: Dynamic compression of copper to over 450 GPa: A high-pressure standard

Journal Article · · Physical Review B
 [1];  [2];  [2];  [1];  [1];  [2];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

We obtained an absolute stress-density path for shocklessly compressed copper to over 450 GPa. A magnetic pressure drive is temporally tailored to generate shockless compression waves through over 2.5-mm-thick copper samples. Furthermore, the free-surface velocity data is analyzed for Lagrangian sound velocity using the iterative Lagrangian analysis (ILA) technique, which relies upon the method of characteristics. We correct for the effects of strength and plastic work heating to determine an isentropic compression path. By assuming a Debye model for the heat capacity, we can further correct the isentrope to an isotherm. Finally, our determination of the isentrope and isotherm of copper represents a highly accurate pressure standard for copper to over 450 GPa.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000; AC52-07NA27344
OSTI ID:
1338384
Alternate ID(s):
OSTI ID: 1247081; OSTI ID: 1810680
Report Number(s):
SAND2016-12396J; LLNL-JRNL-679402; PRBMDO; 649756
Journal Information:
Physical Review B, Vol. 93, Issue 13; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 40 works
Citation information provided by
Web of Science

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Cited By (4)

Crystal structure and equation of state of Fe-Si alloys at super-Earth core conditions journal April 2018
Caloric and isothermal equations of state of solids: empirical modeling with multiply broken power-law densities journal January 2020
Direct calculation of sound speed of materials under ramp wave compression journal November 2018
Non-iterative characteristics analysis for high-pressure ramp loading journal September 2019