Temperature Measurements of Shock Compressed Liquid Deuterium up to 230 GPa

Collins, G. W.; Celliers, P. M.; Silva, L. B. Da; Cauble, R.; Gold, D. M.; Foord, M. E.; Holmes, N. C.; Hammel, B. A.; Wallace, R. J.; Ng, A.

doi:10.1103/physrevlett.87.165504

Cited by 87 publications

(21 citation statements)

References 31 publications

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“…It differs from the laser driven experimental value n/n 0 = 6 and at the same time from the Z-pinch results. At the point of maximum compression our theory predicts the temperature T = 20000 K which is almost two times higher than the temperature obtained experimentally by Collins et al [42] using pyrometric measurements of single-shock-compressed liquid deuterium.…”

Section: Calculation Of the Deuterium Hugoniotcontrasting

confidence: 59%

Thermodynamic Properties of Dense Hydrogen

Schlanges

Bezkrovniy

Vorberger

et al. 2005

Contrib. Plasma Phys.

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The equation of state of hydrogen is determined theoretically in the limits of the fully ionized plasma and the neutral reacting gas mixture. Analytical results are presented for the fully ionized state and compared to data from quantum simulations. The dense hydrogen gas is dealt with using Reaction Ensemble Monte Carlo and hypernetted chain techniques. The results are compared to other theoretical methods and to experimental findings. Finally, Reaction Ensemble Monte Carlo data are combined with Path Integral Monte Carlo results to give a Hugoniot curve covering the entire pressure range.

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Section: Calculation Of the Deuterium Hugoniotcontrasting

confidence: 59%

Thermodynamic Properties of Dense Hydrogen

Schlanges

Bezkrovniy

Vorberger

et al. 2005

Contrib. Plasma Phys.

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“…This uncertainty slightly decreases to about ±30% towards the highest studied quartz temperature, ∼50 000 K. Similar uncertainties were reported for 5500-51 000 K shock temperatures in liquid deuterium. 49 The authors of Ref. 34 reported that in the 1-6 Mbar pressure range with a streaked pyrometer, temperatures relative to quartz emission were ∼1.3× larger for polystyrene (CH) and ∼1.1× larger for polypropylene (CH 2 ) than those based on absolute radiance measurements.…”

Section: Pulsed Laboratory Sourcesmentioning

confidence: 99%

Contributed Review: Absolute spectral radiance calibration of fiber-optic shock-temperature pyrometers using a coiled-coil irradiance standard lamp

Fat’yanov

Asimow

2015

Review of Scientific Instruments

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Development of a fast fiber-optic two-color pyrometer for the temperature measurement of surfaces with varying emissivities Rev. Sci. Instrum. 72, 3366 (2001); 10.1063/1.1384448 This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitationnew. We describe an accurate and precise calibration procedure for multichannel optical pyrometers such as the 6-channel, 3-ns temporal resolution instrument used in the Caltech experimental geophysics laboratory. We begin with a review of calibration sources for shock temperatures in the 3000-30 000 K range. High-power, coiled tungsten halogen standards of spectral irradiance appear to be the only practical alternative to NIST-traceable tungsten ribbon lamps, which are no longer available with large enough calibrated area. However, non-uniform radiance complicates the use of such coiled lamps for reliable and reproducible calibration of pyrometers that employ imaging or relay optics. Careful analysis of documented methods of shock pyrometer calibration to coiled irradiance standard lamps shows that only one technique, not directly applicable in our case, is free of major radiometric errors. We provide a detailed description of the modified Caltech pyrometer instrument and a procedure for its absolute spectral radiance calibration, accurate to ±5%. We employ a designated central area of a 0.7× demagnified image of a coiled-coil tungsten halogen lamp filament, cross-calibrated against a NIST-traceable tungsten ribbon lamp. We give the results of the cross-calibration along with descriptions of the optical arrangement, data acquisition, and processing. We describe a procedure to characterize the difference between the static and dynamic response of amplified photodetectors, allowing time-dependent photodiode correction factors for spectral radiance histories from shock experiments. We validate correct operation of the modified Caltech pyrometer with actual shock temperature experiments on single-crystal NaCl and MgO and obtain very good agreement with the literature data for these substances. We conclude with a summary of the most essential requirements for error-free calibration of a fiber-optic shock-temperature pyrometer using a high-power coiled tungsten halogen irradiance standard lamp. C 2015 AIP Publishing LLC.[http://dx

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“…Hydrogen and deuterium have also been studied by dynamic shock-wave techniques that achieve high pressures at much higher temperatures (∼10-50×10 3 K) for periods of 10-100 ns [48][49][50][51][52]. Optical measurements show a continuous rising reflectivity, consistent with metallic behavior.…”

Section: Introductionmentioning

confidence: 99%