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Kerley, Richard

doi:10.1007/978-1-349-23650-3_3

Cited by 6 publications

(9 citation statements)

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“…The quartz Hugoniot was previously established by the OMEGAlaser experiments to have a linear U s -U p relation given by U sQ = a 0 +a 1 (U pQ −β), where a 0 = 20.57±0.15, a 1 = 1.291 ± 0.036, and β = 12.74 23,26 . This formula is valid at the pressure over 200 GPa and in good agreement with the Kerley-7360 EOS model 27 . Impedance-matching occurs at the intersection of the hydrogen Rayleigh line and the release isentrope of quartz.…”

Section: Results: Shock Velocitiessupporting

confidence: 72%

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

et al. 2011

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The principal Hugoniot for liquid hydrogen was obtained up to 55 GPa under laser-driven shock loading. Pressure and density of compressed hydrogen were determined by impedance-matching to a quartz standard. The shock temperature was independently measured from the brightness of the shock front. Hugoniot data of hydrogen provide a good benchmark to modern theories of condensed matter. The initial number density of liquid hydrogen is lower than that for liquid deuterium, and this results in shock compressed hydrogen having a higher compression and higher temperature than deuterium at the same shock pressure.

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Section: Results: Shock Velocitiessupporting

confidence: 72%

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

et al. 2011

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“…Also shown in the figures are data from Simakov and Trunin, 51 and Vildanov et al 52 The solid line is the predicted U s − u p response from a quartz EOS model, Sesame 7360, 44 with the initial density set at 200 mg/ cc ͑ϳ13.25 times expanded͒. 4 and 5.…”

Section: Aerogel Hugoniot Experimentsmentioning

confidence: 99%

“…The rectangular flyer plate, approximately 12 ϫ 25 mm in lateral dimension by ϳ300 m in effective thickness 42 was accelerated across a nominal 3-to 4-mm vacuum gap by the magnetic field. Due to the considerable porosity of the aerogel sample, shock compression resulted in a significant increase in temperature; the temperature of the silica aerogel on the Hugoniot between ϳ30 and 75 GPa is estimated to be approximately 30 000-70 000 K. 44,45 Thus the shocked aerogel emits a copious amount of visible light, providing a convenient way of diagnosing shock propagation in the sample. The flyer plate velocity was directly measured using a conventional velocity interferometry 43 velocity interferometer system for any reflector ͑VISAR͒ to an accuracy of typically ϳ1% to 2%.…”

Section: Aerogel Hugoniot Experimentsmentioning

confidence: 99%

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Adiabatic release measurements in aluminum from 240-to500-GPa states on the principal Hugoniot

Knudson

Asay

Deeney

2005

Journal of Applied Physics

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Adiabatic release measurements were performed on aluminum (6061-T6) from ∼240-to500-GPa(∼2.4–5Mbar) states on the principal Hugoniot. Using a magnetically accelerated flyer plate technique, capable of launching macroscopic aluminum flyer plates (approximately 12×25mm in lateral dimension and ∼300μm in thickness) to velocities in excess of 20km∕s, direct impact experiments were performed on a low shock impedance, 200-mg∕cc silica aerogel to determine the aerogel Hugoniot in the pressure range of ∼30–75GPa. Release experiments were then performed in which the aerogel was mounted onto an aluminum base plate, and the initial shock in the base plate was transmitted to the aerogel sample. Given the measured aerogel shock velocities from the release experiments and the measured aerogel Hugoniot from the direct impact experiments, release states on release adiabats of aluminum were ascertained. The results were compared to several equation of state models for aluminum, and a rigorous statistical analysis was performed. The statistical analysis enabled the suitability of these various models in describing the release response of hot, liquid states to be determined. This study enhances our understanding of the release response of aluminum for high-pressure states on the Hugoniot and lends confidence to the use of aluminum as a standard material in impedance-matching experiments.

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“…PIMC simulations and the Sesame EOS predict a relatively stiff behavior at high pressures while the LM and FVT + id models yield a more compressible EOS. The application of the various hydrogen EOS to Giant Planets and the comparison of their predicted internal structure with observational parameters is an alternative test besides laboratory experiments, see [51,52] for reviews. Giant Planets like Jupiter consist of roughly 10% helium and 90% hydrogen, forming a cold molecular fluid in the outer envelope and a pressure ionized plasma in the deeper interior as indicated by the existance of a magnetic field.…”

Section: Eos and Hugoniot Curvesmentioning

confidence: 99%

Metal‐Nonmetal Transition in Dense Plasmas

Juranek

Nettelmann

Kuhlbrodt

et al. 2005

Contrib. Plasma Phys.

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We have developed a theoretical approach to the equation of state of dense plasmas which has been applied to hydrogen and deuterium, various metals and noble gases. We compare Hugoniot curves and the sound speed with shock-wave experiments and other theoretical predictions. Especially, the nonmetal-to-metal transition which occurs in dense plasmas at high pressures is discussed by means of the electrical conductvity.

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Cited by 6 publications

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

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

Adiabatic release measurements in aluminum from 240-to500-GPa states on the principal Hugoniot

Metal‐Nonmetal Transition in Dense Plasmas

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