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Plastic plasma as a compressor of aluminum plasma at the PALS experiment

Published online by Cambridge University Press:  30 December 2011

A. Kasperczuk*
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
T. Pisarczyk
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
T. Chodukowski
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
Z. Kalinowska
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
S.Yu. Gus'kov
Affiliation:
P.N. Lebedev Physical Institute of RAS, Moscow, Russia
N.N. Demchenko
Affiliation:
P.N. Lebedev Physical Institute of RAS, Moscow, Russia
D. Klir
Affiliation:
Czech Technical University in Prague, FEE, Prague, Czech Republic
J. Kravarik
Affiliation:
Czech Technical University in Prague, FEE, Prague, Czech Republic
P. Kubes
Affiliation:
Czech Technical University in Prague, FEE, Prague, Czech Republic
K. Rezac
Affiliation:
Czech Technical University in Prague, FEE, Prague, Czech Republic
J. Ullschmied
Affiliation:
Institute of Plasma Physics ASCR, v.v.i., Prague, Czech Republic
E. Krousky
Affiliation:
Institute of Physics ASCR, v.v.i., Prague, Czech Republic
M. Pfeifer
Affiliation:
Institute of Physics ASCR, v.v.i., Prague, Czech Republic
K. Rohlena
Affiliation:
Institute of Physics ASCR, v.v.i., Prague, Czech Republic
J. Skala
Affiliation:
Institute of Physics ASCR, v.v.i., Prague, Czech Republic
P. Pisarczyk
Affiliation:
Warsaw University of Technology, ICS, Warsaw, Poland
*
Address correspondence and reprint request to: A. Kasperczuk, Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland. E-mail: akasperczuk@o2.pl

Abstract

In our earlier papers, we demonstrated that plasma pressure decreases with the growing atomic number of the target material. That experimentally confirmed fact brought about a question whether it would be possible to collimate the Al plasma outflow by using plastic plasma as a compressor. To prove that idea we used in our next experiments a plastic target with an Al cylindrical insert of 400 µm in diameter. The measurements were carried out at the Prague Asterix Laser System iodine laser facility. The laser provided a 250 ps (full width at half maximum (FWHM)) pulse with energy of 130 J at the third harmonic frequency (λ3 = 0.438 µm). The focal spot diameters (ΦL) 800, 1000, and 1200 µm ensured predominance of the plastic plasma amount high enough for the effective Al plasma compression. To study the Al plasma stream propagation and its interaction with plastic plasma a three-frame interferometric system and an X-ray camera were used. The experiment provided a proof that creation of the collimated Al plasma jet by action of outer plastic plasma is feasible. In order to discuss of the experimental results a thorough theoretical analysis was carried out.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2011

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