Equation-of-State Measurements in Ta2O5 Aerogel

Conference · Mon Jan 14 04:00:00 EST 2008 · Shock Compression of Condensed Matter-2007

OSTI ID:921911

Miller, J E ^[1]; Boehly, T R; Meyerhofer, D D; Eggert, J H

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1. Laboratory for Laser Energetics, University of Rochester, Rochester, NY

Highly porous samples of tantalum pentoxide (Ta2O5) aerogel were compressed from initial densities of 0.1, 0.15, and 0.25 g/cm^3 by shock waves with strengths between 0.3 and 3 Mbar. The compressed material was between 5 and 15 times as dense as the unshocked aerogels with temperatures ~5 eV (~58,000 K). These strong shock loadings were produced by the OMEGA Laser System at the Laboratory of Laser Energetics. The shocked states were diagnosed with the OMEGA velocity interferometer system for any reflector. When the compression measurements are compared to an available high-energy-density equation-of-state model, it is found that the model underestimates the level of compression achieved by shock loading below a Mbar.

• Research Organization: Laboratory for Laser Energetics, University of Rochester
• Sponsoring Organization: USDOE
• DOE Contract Number: FC52-92SF19460
• OSTI ID: 921911
• Report Number(s): DOE/SF/19460-797; 2007-21; 1769
• Conference Information: Journal Name: Shock Compression of Condensed Matter-2007 Journal Volume: 955
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPRESSION
DENSITY
EQUATIONS OF STATE
GELS
INTERFEROMETERS
MATHEMATICAL MODELS
SHOCK WAVES
TANTALUM OXIDES
aerogel
equation of state
tantalum pentoxide