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Measurements and laser-wavelength dependence of mass-ablation rate and ablation pressure in planar layered targets

Published online by Cambridge University Press:  09 March 2009

F. Dahmani  and
T. Kerdja
F. Dahmani
Affiliation:
Haut Commissariat à la Recherche/CDTA, Laboratoire de Fusion Thermonucléaire 2, Bd Frantz Fanon, BP 1017, Alger Gare, Algiers, Algeria
T. Kerdja
Affiliation:
Haut Commissariat à la Recherche/CDTA, Laboratoire de Fusion Thermonucléaire 2, Bd Frantz Fanon, BP 1017, Alger Gare, Algiers, Algeria
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Abstract

Layered-targets experiments at 1.06-μm laser light have been performed in order to measure mass-ablation rate ṁ and ablation pressure Pa as a function of absorbed laser flux Ia and laser wavelength λL at irradiances of 1011-4.5 × 1012 W/cm2. The results can be put in the forms ṁ(g/cm2-s) ≈ 4.25 × 105[Ia(W/cm2)/1014]5/9(1 μm/λL)4/9 and Pa(Mbar) ≈ 20[Ia(W/cm2)/1014]7/9(1 μm/λL)2/9, which are consistent with the estimates obtained from a steady-state self-regulated model for plasma heating and with hydrodynamical simulations. Results show also a small lateral energy transport.

Type
Research Article
Information
Laser and Particle Beams , Volume 9 , Issue 3 , September 1991 , pp. 769 - 778
Copyright
Copyright © Cambridge University Press 1991

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