Measurements of electron transport in foils irradiated with a picosecond time scale laser pulse

The heating of solid foils by a picosecond time scale laser pulse has been studied by using x-ray emission spectroscopy. The target material was plastic foil with a buried layer of a spectroscopic tracer material. The laser pulse length was either 0.5 or 2 ps, which resulted in a laser irradiance th...

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Bibliographic Details
Published in:Physical review letters 2011-05, Vol.106 (18), p.185003-185003, Article 185003
Main Authors: Brown, C R D, Hoarty, D J, James, S F, Swatton, D, Hughes, S J, Morton, J W, Guymer, T M, Hill, M P, Chapman, D A, Andrew, J E, Comley, A J, Shepherd, R, Dunn, J, Chen, H, Schneider, M, Brown, G, Beiersdorfer, P, Emig, J
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CAMERAS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DENSITY
DEPTH
DIMENSIONS
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
EMISSION SPECTRA
EMISSION SPECTROSCOPY
FERMIONS
FOILS
HEATING
IONIZING RADIATIONS
LASERS
LEPTONS
MATERIALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PLASTICS
POLYMERS
PULSES
RADIATIONS
RESOLUTION
SPECTRA
SPECTROSCOPY
STREAK CAMERAS
SYNTHETIC MATERIALS
TIME RESOLUTION
TIMING PROPERTIES
X RADIATION
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Summary:The heating of solid foils by a picosecond time scale laser pulse has been studied by using x-ray emission spectroscopy. The target material was plastic foil with a buried layer of a spectroscopic tracer material. The laser pulse length was either 0.5 or 2 ps, which resulted in a laser irradiance that varied over the range 10(16)-10(19) W/cm(2). Time-resolved measurements of the buried layer emission spectra using an ultrafast x-ray streak camera were used to infer the density and temperature conditions as a function of laser parameters and depth of the buried layer. Comparison of the data to different models of electron transport showed that they are consistent with a model of electron transport that predicts the bulk of the target heating is due to return currents.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.106.185003