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Wavelength dependence of laser plasma interaction related to shock ignition approach

Published online by Cambridge University Press:  16 November 2018

T. Pisarczyk*
Affiliation:
Institute of Plasma Physics and Laser Microfusion, 01-497 Warsaw, Poland
S.Yu. Gus'kov
Affiliation:
P. N. Lebedev Physical Institute of RAS, 119991 Moscow, Russian Federation National Research Nuclear University MEPhI, 115409 Moscow, Russian Federation
R. Dudzak
Affiliation:
Institute of Physics, Czech Academy of Sciences, 182 21 Prague, Czech Republic Institute of Plasma Physics, Czech Academy of Sciences, 182 00 Prague, Czech Republic
O. Renner
Affiliation:
Institute of Physics, Czech Academy of Sciences, 182 21 Prague, Czech Republic Institute of Plasma Physics, Czech Academy of Sciences, 182 00 Prague, Czech Republic
D. Batani
Affiliation:
National Research Nuclear University MEPhI, 115409 Moscow, Russian Federation Universite Bordeaux, CNRS, CEA, CELIA, Talence, France
T. Chodukowski
Affiliation:
Institute of Plasma Physics and Laser Microfusion, 01-497 Warsaw, Poland
Z. Rusiniak
Affiliation:
Institute of Plasma Physics and Laser Microfusion, 01-497 Warsaw, Poland
J. Dostal
Affiliation:
Institute of Physics, Czech Academy of Sciences, 182 21 Prague, Czech Republic Institute of Plasma Physics, Czech Academy of Sciences, 182 00 Prague, Czech Republic
N.N. Demchenko
Affiliation:
P. N. Lebedev Physical Institute of RAS, 119991 Moscow, Russian Federation
M. Rosinski
Affiliation:
Institute of Plasma Physics and Laser Microfusion, 01-497 Warsaw, Poland
P. Parys
Affiliation:
Institute of Plasma Physics and Laser Microfusion, 01-497 Warsaw, Poland
M. Smid
Affiliation:
Institute of Physics, Czech Academy of Sciences, 182 21 Prague, Czech Republic
Ph. Korneev
Affiliation:
P. N. Lebedev Physical Institute of RAS, 119991 Moscow, Russian Federation National Research Nuclear University MEPhI, 115409 Moscow, Russian Federation
E. Krousky
Affiliation:
Institute of Physics, Czech Academy of Sciences, 182 21 Prague, Czech Republic Institute of Plasma Physics, Czech Academy of Sciences, 182 00 Prague, Czech Republic
S. Borodziuk
Affiliation:
Institute of Plasma Physics and Laser Microfusion, 01-497 Warsaw, Poland
J. Badziak
Affiliation:
Institute of Plasma Physics and Laser Microfusion, 01-497 Warsaw, Poland
L. Antonelli
Affiliation:
York Plasma Institute, University of York, York, UK
L. Gizzi
Affiliation:
Universita di Roma La Sapienza, Rome,Italy
G. Cristoforetti
Affiliation:
Universita di Roma La Sapienza, Rome,Italy
P. Koester
Affiliation:
Universita di Roma La Sapienza, Rome,Italy
Y. Maheut
Affiliation:
Universite Bordeaux, CNRS, CEA, CELIA, Talence, France
L. Volpe
Affiliation:
Universita di Roma La Sapienza, Rome,Italy
F. Baffigi
Affiliation:
Universita di Roma La Sapienza, Rome,Italy
T. Levato
Affiliation:
Universita di Roma La Sapienza, Rome,Italy
J. Skala
Affiliation:
Institute of Plasma Physics, Czech Academy of Sciences, 182 00 Prague, Czech Republic
A. Zaras-Szydlowska
Affiliation:
Institute of Plasma Physics and Laser Microfusion, 01-497 Warsaw, Poland
J. Trela
Affiliation:
Universita di Roma La Sapienza, Rome,Italy
D. Mancelli
Affiliation:
Universite Bordeaux, CNRS, CEA, CELIA, Talence, France
J. Ullschmied
Affiliation:
Institute of Physics, Czech Academy of Sciences, 182 21 Prague, Czech Republic
M. Pfeifer
Affiliation:
Institute of Physics, Czech Academy of Sciences, 182 21 Prague, Czech Republic Institute of Plasma Physics, Czech Academy of Sciences, 182 00 Prague, Czech Republic
L. Juha
Affiliation:
Institute of Physics, Czech Academy of Sciences, 182 21 Prague, Czech Republic Institute of Plasma Physics, Czech Academy of Sciences, 182 00 Prague, Czech Republic
M. Krus
Affiliation:
Institute of Physics, Czech Academy of Sciences, 182 21 Prague, Czech Republic Institute of Plasma Physics, Czech Academy of Sciences, 182 00 Prague, Czech Republic
J. Hrebicek
Affiliation:
Institute of Physics, Czech Academy of Sciences, 182 21 Prague, Czech Republic Institute of Plasma Physics, Czech Academy of Sciences, 182 00 Prague, Czech Republic
T. Medrik
Affiliation:
Institute of Physics, Czech Academy of Sciences, 182 21 Prague, Czech Republic Institute of Plasma Physics, Czech Academy of Sciences, 182 00 Prague, Czech Republic
K. Jungwirth
Affiliation:
Institute of Physics, Czech Academy of Sciences, 182 21 Prague, Czech Republic
M. Krupka
Affiliation:
Institute of Plasma Physics, Czech Academy of Sciences, 182 00 Prague, Czech Republic
P. Pisarczyk
Affiliation:
Warsaw University of Technology, ICS, 00-661 Warsaw, Poland
*
Author for correspondence: T. Pisarczyk, Institute of Plasma Physics and Laser Microfusion, 01-497 Warsaw, Poland, E-mail: tadeusz.pisarczyk@ifpilm.pl
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Abstract

This paper provides a summary of recent research connected with the shock ignition (SI) concept of the inertial confinement fusion which was carried out at PALS. In the experiments, Cu planar targets coated with a thin CH layer were used. Two-beam irradiation experiment was applied to investigate the effect of preliminary produced plasma to shock-wave generation. The 1ω or 3ω main beam with a high intensity >1015 W/cm2 generates shock wave, while the other 1ω beam with the intensity below 1014 W/cm2 creates CH pre-plasma simulating the pre-compressed plasma related to SI. Influence of laser wavelength on absorbed energy transfer to shock wave was studied by means of femtosecond interferometry and measuring the crater volume. To characterize the hot electron and ion emission, two-dimensional (2D) Kα-imaging of Cu plasma and grid collector measurements were used. In single 1ω beam experiments energy transport by fast electrons produced by resonant absorption made a significant contribution to shock-wave pressure. However, two-beam experiments with 1ω main beam show that the pre-plasma is strongly degrading the scalelength which leads to decreasing the fast electron energy contribution to shock pressure. In both the single 3ω beam experiments and the two-beam experiments with the 3ω main beam, do not show any clear influence of fast electron transport on shock-wave pressure. The non-monotonic behavior of the scalelength at changing the laser beam focal radius in both presence and absence of pre-plasma reflects the competition of plasma motion and electron heat conduction under the conditions of one-dimensional and 2D plasma expansion at large and small focal radii, respectively.

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Type
Research Article
Copyright
Copyright © Cambridge University Press 2018 

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