Evidence of localized heating in CO/sub 2/-laser-produced plasmas

Journal Article · Thu Apr 01 04:00:00 EST 1976 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.322833· OSTI ID:7365937

Haas, R A; Boyle, M J; Manes, K R; Swain, J E

Polyethylene foils and parylene disks have been irradiated by CO/sub 2/ (lambdaapprox.10.6 ..mu..m) and Nd : YAG-glass (lambdaapprox.1.06 ..mu..m) laser pulses focused to flux levels in the 10/sup 13/- and 10/sup 14/-W/cm/sup 2/ range. X-ray pinhole photographs of the CO/sub 2/-laser-produced plasmas exhibit intense localized emission regions whose characteristic dimensions are smaller than the nearly diffraction-limited focal spot of the laser. Corresponding photographs of the glass-laser-produced plasmas show no evidence of localized emission. These experimental results are consistent with theoretical predictions for laser-beam trapping and/or filamentation in laser-produced plasmas. (AIP)

• Research Organization: Lawrence Livermore Laboratory, University of California, Livermore, California 94550
• NSA Number: NSA-33-28667
• OSTI ID: 7365937
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 47:4; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
CARBON DIOXIDE LASERS
CHEMICAL ANALYSIS
ENERGY SPECTRA
FOILS
GAS LASERS
HEATING
LASER-PRODUCED PLASMA
LASER-RADIATION HEATING
LASERS
NEODYMIUM LASERS
NONDESTRUCTIVE ANALYSIS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PLASMA
PLASMA FILAMENT
PLASMA HEATING
POLYETHYLENES
POLYMERS
POLYOLEFINS
SOLID STATE LASERS
SPECTRA
X-RAY EMISSION ANALYSIS
X-RAY SPECTRA