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The influence of an intense laser beam interaction with preformed plasma on the characteristics of emitted ion streams

Published online by Cambridge University Press:  15 October 2007

L. Láska*
Affiliation:
Institute of Physics, ASCR v.v.i., Prague, Czech Republic
J. Badziak
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
S. Gammino
Affiliation:
INFN - Laboratori Nazionali del Sud, Catania, Italy
K. Jungwirth
Affiliation:
Institute of Physics, ASCR v.v.i., Prague, Czech Republic
A. Kasperczuk
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
J. Krása
Affiliation:
Institute of Physics, ASCR v.v.i., Prague, Czech Republic
E. Krouský
Affiliation:
Institute of Physics, ASCR v.v.i., Prague, Czech Republic
P. Kubeš
Affiliation:
Czech Technical University, Prague, Czech Republic
P. Parys
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
M. Pfeifer
Affiliation:
Institute of Physics, ASCR v.v.i., Prague, Czech Republic
T. Pisarczyk
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
K. Rohlena
Affiliation:
Institute of Physics, ASCR v.v.i., Prague, Czech Republic
M. Rosinski
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
L. Ryc´
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
J. Skála
Affiliation:
Institute of Physics, ASCR v.v.i., Prague, Czech Republic
L. Torrisi
Affiliation:
INFN - Laboratori Nazionali del Sud, Catania, Italy
J. Ullschmied
Affiliation:
Institute of Physics, ASCR v.v.i., Prague, Czech Republic Institute of Plasma Physics, ASCR v.v.i., Prague, Czech Republic
A. Velyhan
Affiliation:
Institute of Physics, ASCR v.v.i., Prague, Czech Republic
J. Wolowski
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
*
Address correspondence and reprint requests to: L. Láska, Institute of Physics, ASCR v.v.i., Na Slovance 2, 182 21 Prague 8, Czech Republic. E-mail: laska@fzu.cz

Abstract

Intense laser-beam interactions with preformed plasma, preceding the laser-target interactions, significantly influence both the ion and X-ray generation. It is due to the laser pulse (its total length, the shape of the front edge, its background, the contrast, the radial homogeneity) as well as plasma (density, temperature) properties. Generation of the super fast (FF) ion groups is connected with a presence of non-linear processes. Saturated maximum of the charge states (independently on the laser intensity) is ascribed to the constant limit radius of the self-focused laser beam. Its longitudinal structure is considered as a possible explanation for the course of some experimental dependencies obtained.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2007

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