Abstract
The heating of clusters by femtosecond laser pulses is studied theoretically and experimentally. Both the formation of a cluster target and the results of experimental studies of the cluster plasma by the methods of X-ray emission spectroscopy are considered. A numerical model of cluster formation in a supersonic gas jet is proposed. It is shown that detailed studies of two-phase gas-dynamic processes in a nozzle forming the jet give the spatial distributions of all parameters required for the correct calculation of the cluster heating by short laser pulses. Calculations of nozzles of different configurations show that in a number of cases an almost homogeneous cluster target can be formed, whereas in other cases the distributions of parameters prove to be not only inhomogeneous but also even nonmonotonic. A simple physical model of the plasma production by a femtosecond laser pulse and a picosecond prepulse is proposed. It is shown that a comparison of X-ray spectra with detailed calculations of the ion kinetics makes it possible to determine the main parameters of the plasma being produced.
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Translated from Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 121, No. 1, 2002, pp. 88–101.
Original Russian Text Copyright © 2002 by Skobelev, Faenov, Magunov, Pikuz, Boldarev, Gasilov, Abdallach,, Junkel-Vives, Auguste, d’Oliveira, Hulin, Monot, Blasco, Dorchies, Caillaud, Bonte, Stenz, Salin, Sharkov.
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Skobelev, I.Y., Faenov, A.Y., Magunov, A.I. et al. On the interaction of femtosecond laser pulses with cluster targets. J. Exp. Theor. Phys. 94, 73–83 (2002). https://doi.org/10.1134/1.1448610
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DOI: https://doi.org/10.1134/1.1448610