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Investigations of pressure nonuniformity in laser-irradiated targets using incoherent optical smoothing

Published online by Cambridge University Press:  09 March 2009

I. R. G. Williams ,
G. J. Rickard  and
A. R. Bell
I. R. G. Williams
Affiliation:
Blackett Laboratory, Imperial College of Science and Technology, Prince Consort Road, London SW7 2BZ, United Kingdom
G. J. Rickard
Affiliation:
Blackett Laboratory, Imperial College of Science and Technology, Prince Consort Road, London SW7 2BZ, United Kingdom
A. R. Bell
Affiliation:
Blackett Laboratory, Imperial College of Science and Technology, Prince Consort Road, London SW7 2BZ, United Kingdom
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Abstract

From analytic models of the ablation process in laser-plasma experiments, as well as simulations with Fokker–Planck and Spitzer codes, we have identified a new effect, thermal inertia smoothing. This effect results in a smoother Fokker–Planck temporal and spatial variation of the ablation pressure than that for Spitzer, for the same applied timevarying laser intensity. It is therefore advantageous for incoherent optical smoothing schemes. This is especially true at early times in the laser pulse (≤100 ps).

Type
Research Article
Information
Laser and Particle Beams , Volume 9 , Issue 2 , June 1991 , pp. 247 - 263
Copyright
Copyright © Cambridge University Press 1991

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