Advertisement

Hard X-Ray Emission from Femtosecond Laser Interaction in Overdense Plasmas

  • A. A. Andreev
  • V. N. Novikov
  • K. Yu. Platonov
  • J.-C. Gauthier

Abstract

The recent development of ultra-short pulse lasers has made possible the investigation of laser matter interaction at ultra-high intensities. For sub-picosecond pulses, a hot and overdense plasma is produced very rapidly during the rise of the pulse and further laser interaction occurs with this plasma. One of the results of the interaction is the generation of fast electrons and of intense hard X-ray emission. The X-ray pulse duration is determined by the mean free path of the fast electrons in the target material. It can be very short (< 1 ps) and its intensity sufficient to be detected by the usual methods. With high laser pulse repetition rates, it has been demonstrated1 that one can obtain an instantaneous signature of fast X-ray dense-matter interaction processes. The high energy of the X-ray photons (up to ~ 1 MeV) makes it possible to study small size objects and even to excite nuclear levels.

Keywords

Fast Electron Electron Energy Distribution Function Overdense Plasma Small Size Object Magnetic Field Production 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    F. Raksi, K.R. Wilson Z. Jiang, A. Ikhlef, C.Y. Cote, and J.C. Kieffer, Jl. Chem. Phys. 104: 6066 (1996).ADSCrossRefGoogle Scholar
  2. 2.
    A. Rousse, P. Audebert, J. P. Geindre, F. Fallies, J.-C. Gauthier, A. Mysyrowicz, G. Grillon, and A. Antonetti, Phys. Rev.E 50: 2200 (1994).ADSCrossRefGoogle Scholar
  3. 3.
    S.C. Wilks, Phys. Fluids 5: 2603 (1993).CrossRefGoogle Scholar
  4. 4.
    H. Ruhl, Proceedings of Conference LIRPP, ( Osaka, Japan, 1995 ), p. 65.Google Scholar
  5. 5.
    P. Gibbon, Phys. Rev. Lett. 68:1535, (1992); ibid 73: 664 (1994).Google Scholar
  6. 6.
    E. Lefevbre, Ph. D. Thesis, Paris (1996).Google Scholar
  7. 7.
    J.D. Kmetec, Phys. Rev. Lett. 68: 343 (1992).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • A. A. Andreev
    • 1
  • V. N. Novikov
    • 1
  • K. Yu. Platonov
    • 1
  • J.-C. Gauthier
    • 2
  1. 1.ILPhSC “S.I.Vavilov State Optical Institute”St. PetersburgRussia
  2. 2.LULIEcole PolytechniquePalaiseau CedexFrance

Personalised recommendations