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Ultrashort pulse laser-produced Al/Si plasma

Published online by Cambridge University Press:  09 March 2009

J. Davis ,
R. Clark  and
J. Giuliani
J. Davis
Affiliation:
Plasma Physics Division, Naval Research Laboratory, Washington, DC 20375, USA
R. Clark
Affiliation:
Plasma Physics Division, Naval Research Laboratory, Washington, DC 20375, USA
J. Giuliani
Affiliation:
Plasma Physics Division, Naval Research Laboratory, Washington, DC 20375, USA
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Abstract

The X-ray emission from an ultrashort-pulse laser incident on a solid aluminum and a layered aluminum /silicon slab is investigated with a non-LTE radiation-hydrodynamics model coupled to a Helmholtz wave equation for P-wave polarization. A fraction of the absorbed energy is expended in the production of fast electrons, which are transported and deposited in the cold material. These electrons create K-shell vacancies that produce characteristic Kα line radiation. A time history of the emission spectra, including the Kα lines and continuum radiation, is presented for a laser intensity of 1017 W/cm2.

Type
Research Article
Information
Laser and Particle Beams , Volume 13 , Issue 1 , March 1995 , pp. 3 - 18
Copyright
Copyright © Cambridge University Press 1995

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