Optical probing of hot expanded states produced by shock release

Journal Article · Sat May 01 04:00:00 EDT 1993 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States)

DOI:https://doi.org/10.1103/PhysRevE.47.3547· OSTI ID:5641692

Celliers, P; Ng, A ^[1]

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1. Department of Physics, University of British Columbia, British Columbia, Vancouver, V6T 1Z1 (Canada)

The angle and polarization dependence of optical emission and reflection from dense aluminum plasmas produced in the release wave of a strong shock is investigated theoretically. It is shown that with high-speed measurements (few-picosecond resolution), optical probing of the unloading plasma can be used to examine transport properties and ionization balance of thermodynamic states in the vicinity of the liquid-vapor critical point. The calculations were performed using data from two wide-ranging theoretical models of plasma conductivity, a semianalytical model due to Lee and More [Phys. Fluids 27, 1273 (1984)] and a partial-wave analysis due to Rinker [Phys. Rev. B 31, 4207 (1985); 31, 4220 (1985)]. The models predict substantially different values for the conductivity close to the liquid-vapor critical point (more than a factor of 10 for the electron-ion collison time); the different results obtained for the two models suggest that experimental measurements could provide new information for improving the current understanding of dense plasma properties.

• OSTI ID: 5641692
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States), Journal Name: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States) Vol. 47:5; ISSN PLEEE8; ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320* -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
ALUMINIUM
ANGULAR DISTRIBUTION
CRITICAL TEMPERATURE
DISTRIBUTION
ELEMENTS
EMISSION
FLUIDS
GASES
HOT PLASMA
LIQUIDS
METALS
OPTICAL PROPERTIES
PHOTON EMISSION
PHYSICAL PROPERTIES
PLASMA
PLASMA DIAGNOSTICS
PLASMA DRIFT
POLARIZATION
REFLECTION
RESOLUTION
SHOCK WAVES
THERMODYNAMIC PROPERTIES
TIME RESOLUTION
TIMING PROPERTIES
TRANSITION TEMPERATURE
VAPORS