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High precision Hugoniot measurements on statically pre-compressed fluid helium

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4963284· OSTI ID:1336361
Here we describe how the capability for statically pre-compressing fluid targets for Hugoniot measurements utilizing gas gun driven flyer plates has been developed. Pre-compression expands the capability for initial condition control, allowing access to thermodynamic states off the principal Hugoniot. Absolute Hugoniot measurements with an uncertainty less than 3% on density and pressure were obtained on statically pre-compressed fluid helium utilizing a two stage light gas gun. Helium is highly compressible; the locus of shock states resulting from dynamic loading of an initially compressed sample at room temperature is significantly denser than the cryogenic fluid Hugoniot even for relatively modest (0.27–0.38 GPa) initial pressures. Lastly, the dynamic response of pre-compressed helium in the initial density range of 0.21–0.25 g/cm3 at ambient temperature may be described by a linear shock velocity (us) and particle velocity (up) relationship: us = C0 + sup, with C0 = 1.44 ± 0.14 km/s and s = 1.344 ± 0.025.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE; USDOE National Nuclear Security Administration (NNSA), Office of Defense Science (NA-113)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1336361
Alternate ID(s):
OSTI ID: 1326713
Report Number(s):
SAND2016-8951J; 647306
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 12 Vol. 120; ISSN JAPIAU; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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