Laser-shock compression and Hugoniot measurements of liquid hydrogen to 55 GPa

Sano, Takayoshi; Ozaki, Norimasa; Sakaiya, Tatsuhiro; Shigemori, K.; Ikoma, Masahiro; Kimura, Tomoaki; Miyanishi, Kohei; Endo, Tamio; Shiroshita, A.; Takahashi, Hirokazu; Jitsui, Tatsuya; Hori, Yasunori; Hironaka, Yoichiro; Iwamoto, A.; Kadono, Toshihiko; Nakai, M.; Okuchi, Takuo; Otani, K.; Shimizu, Katsuya; Kondo, Tadashi; Kodama, R.; Mima, K.

doi:10.1103/physrevb.83.054117

Cited by 37 publications

(29 citation statements)

References 39 publications

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“…We adopted the reflectivity at the VISAR wavelength assuming a weak dependence of R on the wavelength. 25 An example of the emission intensity versus time data is shown in Fig. 3.…”

Section: Methodsmentioning

confidence: 98%

“…To precisely determine the velocity at the interface time, we linearly fitted the velocities over 0.5 ns and extrapolated to forward or backward the impedance-matching time. 25 The velocities were calculated by averaging the shock profile over 100 ps. Here, we neglected the preheat effect, which was estimated to be less than 0.03 eV from radiation hydrodynamic simulations with the MULTI code.…”

Section: Methodsmentioning

confidence: 99%

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P-ρ-T measurements of H2O up to 260 GPa under laser-driven shock loading

Kimura

Ozaki

Sano

et al. 2015

The Journal of Chemical Physics

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Pressure, density, and temperature data for H2O were obtained up to 260 GPa by using laser-driven shock compression technique. The shock compression technique combined with the diamond anvil cell was used to assess the equation of state models for the P-ρ-T conditions for both the principal Hugoniot and the off-Hugoniot states. The contrast between the models allowed for a clear assessment of the equation of state models. Our P-ρ-T data totally agree with those of the model based on quantum molecular dynamics calculations. These facts indicate that this model is adopted as the standard for modeling interior structures of Neptune, Uranus, and exoplanets in the liquid phase in the multi-Mbar range.

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“…We adopted the reflectivity at the VISAR wavelength assuming a weak dependence of R on the wavelength. 25 An example of the emission intensity versus time data is shown in Fig. 3.…”

Section: Methodsmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

P-ρ-T measurements of H2O up to 260 GPa under laser-driven shock loading

Kimura

Ozaki

Sano

et al. 2015

The Journal of Chemical Physics

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“…While most previous experimental work has been on deuterium samples, a recent experiment using laserdriven shock waves (Sano et al, 2011a) measured shocked hydrogen in the pressure range between 25 GPa and 55 GPa. The lower pressure data are in agreement with previous experiments (Dick and Kerley, 1980;Nellis et al, 1983a) and at higher pressures they show a compression of ∼ 5, which suggest that hydrogen is more compressible than deuterium.…”

Section: Fig 11 (Color Online)mentioning

confidence: 99%

“…Therefore, the same shock applied to hydrogen and deuterium will achieve higher pressures in deuterium. The principle Hugoniot for hydrogen has recently been measured up to 55 GPa using laser-driven shock compression (Sano et al, 2011b). See section IV.B.1 for a detailed discussion of the measured and calculated Hugoniots of H 2 and D 2 .…”

Section: A Dynamical Compressionmentioning

confidence: 99%

“…A number of techniques have been developed to produce shocks, including gas guns (Nellis et al, 1983a), laser-driven compression (Collins et al, 1998a,b;Da Silva et al, 1997;Hicks et al, 2009;Sano et al, 2011b), magnetically driven flyers (Knudson and Desjarlais, 2009;Knudson et al, 2001Knudson et al, , 2004, and hemi-spherically converging explosives (Boriskov et al, 2005). Because the shock process is adiabatic, large increases in temperature also occur with the increases in pressure.…”

Section: A Dynamical Compressionmentioning

confidence: 99%

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The properties of hydrogen and helium under extreme conditions

McMahon¹,

Morales²,

Pierleoni³

et al. 2012

Rev. Mod. Phys.

478

415

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Hydrogen and helium are the most abundant elements in the universe and, in principle, are the simplest elements. Nonetheless, they display remarkable properties under pressure that have fascinated theoreticians and experimentalists for over a century. Recent advances in computational methods have made it possible to elucidate many of these properties. We review some of the computational methods that have been applied to dense hydrogen and helium in recent years, mainly those that perform a simulation directly from the physical picture of electrons and ions; primarily, those based on density functional theory and quantum Monte Carlo methods. We then discuss the predictions from such methods as applied to the phase diagram of hydrogen, including the solid and fluid phases, with particular focus on the crystal structures, the liquidliquid transition and comparison of the results with experimental shock-wave data. We then discuss predictions of ordered quantum states, including a possible low-temperature fluid and high-temperature superconductivity in the atomic state. We also briefly discuss pure helium, and then focus on hydrogen-helium mixtures, with particular focus on properties of relevance to planetary science.

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Shock Waves and Ablation Dynamics

Takabe

2024

Springer Series in Plasma Science and Technology

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When an intense laser is irradiated on a solid target, the laser energy is absorbed on the surface so that the material becomes plasma to expand into the vacuum region. Through the laser-plasma interaction, the laser energy heats the expanding region spreading by its sound velocity. As the result the expanding region has the temperature ~ 1 keV and the pressure reaches 100 Mbar (10TPa). Since the laser is absorbed near relatively high density (~cut-off density), the plasma can be assumed to be in LTE and hydrodynamic description is acceptable.The surface pressure called ablation pressure drives strong shock waves in the solid material as if the solid is almost gas. The shock wave physics is briefly reviewed to use the Rankin-Hugoniot (RH) relation, although detail studied is needed for the equation of state of the compressed matter. By use of the ablation pressure, it is possible to accelerate a thin material to higher velocity like a rocket propulsion.One dimensional hydrodynamics is reviewed for steady state and time dependent dynamics within the ideal fluid assumption. Deflagration and detonation waves are also explained as jump condition with energy deposition. The laser implosion dynamics is compered between stationary solutions, computational results, and the experimental data. The importance of validation of simulation codes is discussed.

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Laser-shock compression and Hugoniot measurements of liquid hydrogen to 55 GPa

Cited by 37 publications

References 39 publications

P-ρ-T measurements of H2O up to 260 GPa under laser-driven shock loading

P-ρ-T measurements of H2O up to 260 GPa under laser-driven shock loading

The properties of hydrogen and helium under extreme conditions

Shock Waves and Ablation Dynamics

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