Hugoniot Data for Helium in the Ionization Regime

Journal Article · Fri Mar 28 04:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.124503· OSTI ID:21123787

Eggert, J; Celliers, P M; Hicks, D G; Collins, G W ^[1]; Brygoo, S ^[1]; Loubeyre, P ^[2]; McWilliams, R S ^[1]; Boehly, T R ^[3]; Jeanloz, R ^[4]

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1. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
2. Departement de Physique, Theorique et Applications, CEA, Commissariat a l'Energie Atomique, 91680 Bruyeres-le-Chatel (France)
3. Laboratory for Laser Energetics, University of Rochester, Rochester, New York (United States)
4. University of California, Berkeley, California (United States)

Hugoniot data were obtained for fluid He in the 100 GPa pressure range by shock compression of samples statically precompressed in diamond-anvil cells. The initial (precompressed) He density ({rho}{sub 1}) for each experiment was tuned to a value between {rho}{sub 0L}<{rho}{sub 1}<3.3{rho}{sub 0L}, where {rho}{sub 0L} is the zero-pressure density of the cryogenic liquid ({rho}{sub 0L}=0.123 g/cm{sup 3}). The maximum observed shock-compression ratios range from {rho}/{rho}{sub 1}=6 for {rho}{sub 1}={rho}{sub 0L} to {rho}/{rho}{sub 1}=4 for {rho}{sub 1}{>=}3{rho}{sub 0L} (i.e., {rho}/{rho}{sub 0L}{>=}12). Data show an increase in compressibility at the onset of ionization, similar to theoretical predictions.

• OSTI ID: 21123787
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 100; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPRESSIBILITY
COMPRESSION
COMPRESSION RATIO
DIAMONDS
HELIUM
IONIZATION
PRESSURE RANGE GIGA PA