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Studies of thin foils acceleration by pulsed laser beam

Published online by Cambridge University Press:  09 March 2009

I. N. Burdonsky ,
A. L. Velikovich ,
V. V. Gavrilov ,
A. Yu. Gol'tsov ,
E. V. Zhuzhukalo ,
N. G. Kovalsky ,
M. A. Liberman  and
M. I. Pergament
I. N. Burdonsky
Affiliation:
I. V. Kurchatov Institute of Atomic Energy, Moscow 123182, U.S.S.R.
A. L. Velikovich
Affiliation:
I. V. Kurchatov Institute of Atomic Energy, Moscow 123182, U.S.S.R.
V. V. Gavrilov
Affiliation:
I. V. Kurchatov Institute of Atomic Energy, Moscow 123182, U.S.S.R.
A. Yu. Gol'tsov
Affiliation:
I. V. Kurchatov Institute of Atomic Energy, Moscow 123182, U.S.S.R.
E. V. Zhuzhukalo
Affiliation:
I. V. Kurchatov Institute of Atomic Energy, Moscow 123182, U.S.S.R.
N. G. Kovalsky
Affiliation:
I. V. Kurchatov Institute of Atomic Energy, Moscow 123182, U.S.S.R.
M. A. Liberman
Affiliation:
I. V. Kurchatov Institute of Atomic Energy, Moscow 123182, U.S.S.R.
M. I. Pergament
Affiliation:
I. V. Kurchatov Institute of Atomic Energy, Moscow 123182, U.S.S.R.
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Abstract

Experimental studies of the ablative acceleration of thin foils as carried out on the “Mishen” device (Nd laser, λ = 1·06μm, 3 nsec pulses) are reported. The plasma corona in the range of power densities 1013–1014 W/cm2 is shown to absorb 80–90% of the laser beam energy, the classical collisional absorption mechanism being the main one. Jet-like and filamentary structures are observed in the laser-plasma interaction; however, the main plasma parameters are found to be independent of the presence (or absence) of such structures. The measured hydrodynamic efficiency of stable ablative acceleration in plane geometry is ≲5%. The production of high-speed cumulative jets with irradiated thin-wall hollow conical targets is reported as an example of a non-traditional ablative acceleration geometry.

Type
Research Article
Information
Laser and Particle Beams , Volume 6 , Issue 2 , May 1988 , pp. 327 - 334
Copyright
Copyright © Cambridge University Press 1988

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References

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