Time-resolved L -shell absorption spectroscopy: A direct measurement of density and temperature in a germanium laser-produced plasma

Journal Article · Mon Sep 17 00:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.1435· OSTI ID:6055920

Bruneau, J; Chenais-Popovics, C; Desenne, D; Gauthier, J; Geindre, J; Klapisch, M; Le Breton, J; Louis-Jacquet, M; Naccache, D; Perrine, J ^[1]

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1. Centre d'Etudes de Limeil-Valenton, 94195 Villeneuve-St-Georges (France) Laboratoire de Physique des Milieux Ionises, Ecole Polytechnique, 91128 Palaiseau (France) Lawrence Livermore National Laboratory, Livermore, CA (USA)

{ital L}-shell absorption of germanium transitions has been exploited for the first time to diagnose the low-temperature, high-density region of multilayered targets irradiated by 0.35-{mu}m laser light at irradiances around 10{sup 14} W/cm{sup 2}. A detailed atomic-physics package has been used to relate the observed absorption wavelengths to the ionic distribution from Ge VII to Ge XX and to the electron plasma parameters. Results show time-dependent temperature variations closely following the driving-laser pulse shape, in agreement with hydrocode simulations.

• OSTI ID: 6055920
• Journal Information: Physical Review Letters; (USA), Vol. 65:12; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
LASER-PRODUCED PLASMA
PLASMA DIAGNOSTICS
ABSORPTION SPECTRA
ATOMIC PHYSICS
ELECTRON TEMPERATURE
EXPERIMENTAL DATA
GERMANIUM
L SHELL
PLASMA DENSITY
PULSES
STREAK PHOTOGRAPHY
TEMPERATURE MEASUREMENT
TIME RESOLUTION
VARIATIONS
DATA
ELECTRONIC STRUCTURE
ELEMENTS
INFORMATION
METALS
NUMERICAL DATA
PHOTOGRAPHY
PHYSICS
PLASMA
RESOLUTION
SPECTRA
TIMING PROPERTIES
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