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Title: Measurement of the adiabatic index in Be compressed by counterpropagating shocks

Abstract

Here, we report on the first direct measurement of the adiabatic index through x-ray Thomson scattering from shock-compressed beryllium. 9 keV x-ray photons probe the bulk properties of matter during the collision of two counterpropagating shocks. This novel experimental technique determines by using only the measured mass densities and vanishing particle velocity at the point of shock collision to close the Rankine-Hugoniot equations. We find γ > 5/3 at 3x compression, clearly different from ideal gas behavior. At 6x compression, shows the convergence to the ideal gas limit, in agreement with linear scaling laws.

Authors:
 [1];  [2];  [3];  [4];  [3];  [3];  [3]
+ Show Author Affiliations
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of California, Los Angeles, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Univ. of California, Berkeley, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1334278
Alternate Identifier(s):
OSTI ID: 1098811
Grant/Contract Number:  
FG52-09NA29035; FG52-06NA26212
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 108; Journal Issue: 17; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Fortmann, C., Lee, H. J., Doppner, T., Falcone, R. W., Kritcher, A. L., Landen, O. L., and Glenzer, S. H. Measurement of the adiabatic index in Be compressed by counterpropagating shocks. United States: N. p., 2012. Web. doi:10.1103/PhysRevLett.108.175006.
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Fortmann, C., Lee, H. J., Doppner, T., Falcone, R. W., Kritcher, A. L., Landen, O. L., & Glenzer, S. H. Measurement of the adiabatic index in Be compressed by counterpropagating shocks. United States. https://doi.org/10.1103/PhysRevLett.108.175006
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Fortmann, C., Lee, H. J., Doppner, T., Falcone, R. W., Kritcher, A. L., Landen, O. L., and Glenzer, S. H. Wed . "Measurement of the adiabatic index in Be compressed by counterpropagating shocks". United States. https://doi.org/10.1103/PhysRevLett.108.175006. https://www.osti.gov/servlets/purl/1334278.
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@article{osti_1334278,
title = {Measurement of the adiabatic index in Be compressed by counterpropagating shocks},
author = {Fortmann, C. and Lee, H. J. and Doppner, T. and Falcone, R. W. and Kritcher, A. L. and Landen, O. L. and Glenzer, S. H.},
abstractNote = {Here, we report on the first direct measurement of the adiabatic index through x-ray Thomson scattering from shock-compressed beryllium. 9 keV x-ray photons probe the bulk properties of matter during the collision of two counterpropagating shocks. This novel experimental technique determines by using only the measured mass densities and vanishing particle velocity at the point of shock collision to close the Rankine-Hugoniot equations. We find γ > 5/3 at 3x compression, clearly different from ideal gas behavior. At 6x compression, shows the convergence to the ideal gas limit, in agreement with linear scaling laws.},
doi = {10.1103/PhysRevLett.108.175006},
journal = {Physical Review Letters},
number = 17,
volume = 108,
place = {United States},
year = {Wed Apr 25 00:00:00 EDT 2012},
month = {Wed Apr 25 00:00:00 EDT 2012}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevLett.108.175006
Copyright Statement
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Citation Metrics:
Cited by: 25 works
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Figures / Tables:

FIG. 1 FIG. 1: (Color online) (a) Photograph of the target (b) Experimental setup (c) Rad-hydro simulation of the mass density evolution. Drive beam intensity pro les for each side (grey and purple) and x-ray probe pulse (white) are overlaid. (d) Raw x-ray scattering data. Top to bottom: Calibration shot, measuring themore » Zn He-α doublet; scattering before and after shock collision showing elastic and Compton scattering; increased Compton width is observed after after shock collision.« less
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Works referenced in this record:

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X-Ray Thomson-Scattering Measurements of Density and Temperature in Shock-Compressed Beryllium
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    Works referencing / citing this record:

    Ionization dynamics of dense matter generated by intense ultrashort X-ray pulses
    journal, February 2019

    • Shihab, Mohammed; Bornath, Thomas; Redmer, Ronald
    • Contributions to Plasma Physics, Vol. 59, Issue 4-5
    • DOI: 10.1002/ctpp.201800156

    Observation of finite-wavelength screening in high-energy-density matter
    journal, April 2015

    • Chapman, D. A.; Vorberger, J.; Fletcher, L. B.
    • Nature Communications, Vol. 6, Issue 1
    • DOI: 10.1038/ncomms7839
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      Figures / Tables found in this record:

      FIG. 1 (p. 3)figure
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