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Efficiency of ablative plasma energy transfer into a massive aluminum target using different atomic number ablators

Published online by Cambridge University Press:  30 April 2015

A. Kasperczuk ,
T. Pisarczyk ,
T. Chodukowski ,
Z. Kalinowska ,
W. Stepniewski ,
K. Jach ,
R. Swierczynski ,
O. Renner ,
M. Smid  and
J. Ullschmied
...Show all authors
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
W. Stepniewski
Affiliation:
Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland
K. Jach
Affiliation:
Institute of Optoelectronics, Military University of Technology, Warsaw, Poland
R. Swierczynski
Affiliation:
Institute of Optoelectronics, Military University of Technology, Warsaw, Poland
O. Renner
Affiliation:
Institute of Physics ASCR, v.v.i., Prague, Czech Republic
M. Smid
Affiliation:
Institute of Physics ASCR, v.v.i., Prague, Czech Republic
J. Ullschmied
Affiliation:
Institute of Physics ASCR, v.v.i., Prague, Czech Republic Institute of Plasma Physics ASCR, v.v.i., Prague, Czech Republic
J. Cikhardt
Affiliation:
Czech Technical University in Prague, FEE, Prague, Czech Republic
D. Klir
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
E. Krousky
Affiliation:
Institute of Plasma Physics ASCR, v.v.i., Prague, Czech Republic
M. Pfeifer
Affiliation:
Institute of Plasma Physics ASCR, v.v.i., Prague, Czech Republic
J. Skala
Affiliation:
Institute of Plasma Physics ASCR, v.v.i., Prague, Czech Republic
*
Address correspondence and reprint requests to: T. Pisarczyk, Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland. E-mail: [email protected]
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Abstract

This paper aims at investigation of efficiency of an ablative plasma energy transfer into a massive aluminum target using different atomic number ablators. For this reason, several target materials representing a wide range of atomic numbers (Z = 3.5–73) were used. The experiment was carried out at the iodine Prague Asterix Laser System. The laser provided a 250 ps pulse with energy of 130 J at the third harmonic frequency (λ3 = 0.438 μm). To study the plasma stream configurations a four-frame X-ray pinhole camera was used. The electron temperature of the plasma in the near-surface target region was measured by means of an X-ray spectroscopy. The efficiency of the plasma energy transport to the target was determined via the crater volume measurement using the crater replica technique. The experimental results were compared with two-dimensional numerical simulations where the plasma dynamics was based on the one-fluid, two temperature model, including radiation transport in diffusive approximation and ionization kinetics. It was shown that the plasma expansion geometry plays an important role in the ablative plasma energy transfer into the target.

Keywords

Ablator atomic numberCrater volumeLaser energy transferPlasma ablative pressurePlasma expansion geometryPlasma temperature
Type
Research Article
Information
Laser and Particle Beams , Volume 33 , Issue 3 , September 2015 , pp. 379 - 386
Copyright
Copyright © Cambridge University Press 2015 

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References

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