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The generation of fast particles in plasmas created by laser pulses with different wavelengths

  • Plasma, Gases
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Abstract

By means of spatially resolved high-resolution X-ray spectroscopy, we have investigated the generation of fast ions at various laser installations with different flux densities and laser wavelengths. It is demonstrated that the fast ion generation in laser-produced plasma can be achieved for a very low level of the averaged laser intensity on the target. The time-of-flight mass spectrometry ion diagnostics and X-ray spectrographs give very close results for the energy distribution of the thermal ion component. For higher energies, however, we found significant differences: the spatially resolved high-resolution spectrographs expose the presence of suprathermal ions, while the time-of-flight method does not. Suprathermal ion energies E ion plotted as a function of the qλ2 parameter show a large scatter far above the experimental errors. The cause of these large scatters is attributed to a strong nonuniformity of the laser intensity distribution in the focal spot. The analysis by means of hydrodynamics and spectral simulations show that the X-ray emission spectrum is a complex convolution from different parts of the plasma with strongly different electron density and temperature. It is shown that the highly resolved Li-like satellite spectrum near Heαcontains significant distortions even for very low hot electron fractions. Non-Maxwellian spectroscopy allows determination of both the hot electron fraction and the bulk electron temperature.

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Authors and Affiliations

  1. Institut für Kernphysik, Technische Universität Darmstadt, Abt. Strahlen-und Kernphysik, D-64289, Darmstadt, Germany

    F. B. Rosmej, D. H. H. Hoffmann & W. Süß

  2. Troitsk Institute of Innovative and Thermonuclear Research (TRINITI), Moscow, 142092, Russia

    A. E. Stepanov, Yu. A. Satov, Yu. B. Smakovskii, V. K. Roerich, S. V. Khomenko, K. N. Makarov & A. N. Starostin

  3. Multicharged Ions Spectra Data Center of VNIIFTRI, Mendeleevo, Moscow oblast, 141570, Russia

    A. Ya. Faenov, I. Yu. Skobelev & A. I. Magunov

  4. Institut für Angewandte Physik, Technische Universität Darmstadt, D-64289, Darmstadt, Germany

    M. Geißel, P. Pirzadeh & W. Seelig

  5. Bauman Moscow State Technical University, Moscow, 107005, Russia

    T. A. Pikuz

  6. Gesellschaft für Schwerionenforschung, Plasmaphysics, D-64291, Darmstadt, Germany

    R. Bock

  7. Dipartimento Innovazione, CR ENEA, Frascati, Italy

    T. Letardi, F. Flora, S. Bollanti & P. Di Lazzaro

  8. Dipartimento di Fisica e INFM, INFN g.e. LNGS, Università de L’Aquila, 67010, L’Aquila, Italy

    A. Reale, A. Scafati & G. Tomassetti

  9. Centre d’Etudes de Saclay, DSM/DRECAM/SPAM, Bât 52291191, Gif-sur-Yvette, Cédex, France

    T. Auguste, P. d’ Oliveira, S. Hulin & P. Monot

  10. Institute of Theoretical and Experimental Physics, Moscow, 117257, Russia

    B. Yu. Sharkov

Authors
  1. F. B. Rosmej
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  2. D. H. H. Hoffmann
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  3. W. Süß
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  4. A. E. Stepanov
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  5. Yu. A. Satov
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  6. Yu. B. Smakovskii
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  7. V. K. Roerich
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  8. S. V. Khomenko
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  9. K. N. Makarov
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  10. A. N. Starostin
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  11. A. Ya. Faenov
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  12. I. Yu. Skobelev
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  13. A. I. Magunov
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  14. M. Geißel
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  15. P. Pirzadeh
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  16. W. Seelig
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  17. T. A. Pikuz
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  18. R. Bock
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  19. T. Letardi
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  20. F. Flora
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  21. S. Bollanti
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  22. P. Di Lazzaro
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  23. A. Reale
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  24. A. Scafati
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  25. G. Tomassetti
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  26. T. Auguste
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  27. P. d’ Oliveira
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  28. S. Hulin
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  29. P. Monot
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  30. B. Yu. Sharkov
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Additional information

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. 73–87.

Original English Text Copyright © 2002 by Rosmej, Hoffmann, Süß, Stepanov, Satov, Smakovskii, Roerich, Khomenko, Makarov, Starostin, Faenov, Skobelev, Magunov, Geißel, Pirzadeh, Seelig, Pikuz, Bock, Letardi, Flora, Bollanti, Di Lazzaro, Reale, Scafati, Tomassetti, Auguste, d’Oliveira, Hulin, Monot, Sharkov.

This article was submitted by the authors in English.

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Rosmej, F.B., Hoffmann, D.H.H., Süß, W. et al. The generation of fast particles in plasmas created by laser pulses with different wavelengths. J. Exp. Theor. Phys. 94, 60–72 (2002). https://doi.org/10.1134/1.1448609

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  • DOI: https://doi.org/10.1134/1.1448609

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