Percolation upon expansion of nanosecond-pulse-produced laser plasma into a gas

Journal Article · Mon Jan 31 04:00:00 EST 2005 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2005V035N01ABEH002873· OSTI ID:21470679

Kask, Nikolai E; Michurin, Sergei V; Fedorov, Gennadii M ^[1]

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1. D.V. Skobel'tsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, Moscow (Russian Federation)

Spectral studies of a plasma expanding into the ambient gas upon ablation of various targets by nanosecond laser pulses of moderate intensities are performed. It is found that the dependences of the intensities of spectral lines on the pressure of the buffer gas and the target composition have a threshold character typical of percolation. It is ascertained that a three-dimensional percolation occurs in plasma, and its threshold is determined by the atomic density of the metal component contained in the target. It is shown that percolation clusters, existing at temperatures higher than the boiling temperature of the target material, affect the plasma absorption ability, temperature, and spectral continuum of plasma emission. (interaction of laser radiation with matter. laser plasma)

• OSTI ID: 21470679
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 1 Vol. 35; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABLATION
ABSORPTION
BOILING POINTS
BUFFERS
DENSITY
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION
EXPANSION
LASER RADIATION
LASER TARGETS
LASER-PRODUCED PLASMA
METALS
PHYSICAL PROPERTIES
PLASMA
PLASMA EXPANSION
PULSES
RADIATIONS
SORPTION
TARGETS
THERMODYNAMIC PROPERTIES
THREE-DIMENSIONAL CALCULATIONS
TRANSITION TEMPERATURE