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Generation of picosecond high-density ion fluxes by skin-layer laser-plasma interaction

Published online by Cambridge University Press:  07 June 2005

J. BADZIAK ,
S. GŁOWACZ ,
S. JABŁOŃSKI ,
P. PARYS ,
J. WOŁOWSKI  and
H. HORA
J. BADZIAK
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
S. GŁOWACZ
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
S. JABŁOŃSKI
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
P. PARYS
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
J. WOŁOWSKI
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
H. HORA
Affiliation:
Department of Theoretical Physics, University of New South Wales, Sydney, Australia
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Abstract

The possibilities of producing ultrahigh-current-density ps ion fluxes by the skin-layer interaction of a short (≤ 1ps) laser pulse with plasma were studied using two-fluid hydrodynamic simulations, and the time-of-flight measurements. Backward-emitted ion fluxes from a massive (Au) target as well as forward-emitted fluxes from various thin foil targets irradiated by a 1-ps laser pulse of intensity up to 2 × 1017 W/cm2 were recorded. Both the simulations and the measurements confirmed that using the short-pulse skin-layer interaction of a laser pulse with a thin pre-plasma layer in front of a solid target, a high-density collimated ion flux of extremely high ion current density (∼ 1010 A/cm2 close to the target), can be generated at laser intensity only ∼ 1017 W/cm2. The ion current densities produced by this way were found to be comparable to (or even higher than) those estimated from recent short-pulse experiments using a target normal sheath acceleration mechanism at relativistic laser intensities. The effect of the target structure on the current densities and energies of forward-emitted ions is demonstrated.

Keywords

Ion fluxesLaserPicosecond pulsesPlasma

Information

Type
Research Article
Information
Laser and Particle Beams , Volume 23 , Issue 2 , June 2005 , pp. 143 - 147
Copyright
2005 Cambridge University Press

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Footnotes

This paper was presented at the 28th ECLIM conference in Rome, Italy.

References

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