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

Journal Article · Thu Apr 01 04:00:00 EST 1976 · J. Appl. Phys., v. 47, no. 4, pp. 1318-1321

OSTI ID:4079291

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-33-028667
• OSTI ID: 4079291
• Journal Information: J. Appl. Phys., v. 47, no. 4, pp. 1318-1321, Journal Name: J. Appl. Phys., v. 47, no. 4, pp. 1318-1321; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

*LASER-RADIATION HEATING
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N70100* --Physics--Controlled Thermonuclear Research-- Confinement & Heating
NEODYMIUM LASERS
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POLYETHYLENES
X-RAY EMISSION ANALYSIS
X-RAY SPECTRA