Advertisement

Laser Heated Overdense Plasmas for Thermonuclear Fusion

  • M. Lubin
  • J. Soures
  • E. Goldman
  • T. Bristow
  • W. Leising

Abstract

In this paper we report theoretical and experimental work on the vaporization and heating of spherical overdense plasmas. Details of the required laser optics are described, together with charged particle, x-ray, and neutron diagnostics. A series of numerical experiments have been conducted to investigate the dynamics and neutron production in dense spherically symmetric plasmas. These have led to a development of scalings for energy absorption, shock strength and optimum neutron production. Similar numerical work has also been used to study the conversion of input laser radiation to output soft x-rays from an oxygen doped spherical laser plasma. The fast risetime of the calculated spectra suggests a method of producing a population inversion.

Finally, we put forward one example of a breakeven configuration not requiring anomalous absorption.

Keywords

Focal Spot Electron Number Density Neutron Production Thermal Front Inverse Bremsstrahlung 
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.
    Yu.V. Afanasov, et al. JETP Lett. 13, 182 (1971).ADSGoogle Scholar
  2. 2.
    R.E. Kidder, Proceedings of Esfahan Symposium on Fundamental and Applied Laser Physics, Esfahan, Iran (1971).Google Scholar
  3. 3.
    H. Hora, these Proceedings, p. 515.Google Scholar
  4. 4.
    D.F. DuBois and M.V. Goldman, Phys. Rev. Lett. 164, 207 (1967).ADSGoogle Scholar
  5. 5.
    P.K. Kaw and J.M. Dawson, Phys. Fluids 12, 2586 (1969).ADSCrossRefGoogle Scholar
  6. 6.
    G. Dube’, Appl. Phys. Lett. 18, 69 (1971).ADSCrossRefGoogle Scholar
  7. 7.
    S.W. Mead, et al., Appl. Optics 11, 345 (1972).ADSCrossRefGoogle Scholar
  8. 8.
    A. Boivin and E. Wolf, Phys. Rev. 138B, 1561, 1965.ADSCrossRefGoogle Scholar
  9. 9.
    O.N. Krokhin, High Temperature and Plasma Phenomena Induced by Laser Radiation, Physics of High Energy Density, Edited by Corso Academic Press, New York (1971).Google Scholar
  10. 10.
    G. Haas and J.E. Waylonis, J, Opt. Soc. Am. 51, 719 (1961).ADSCrossRefGoogle Scholar
  11. 11.
    N. Frenkel, “Kinetic Theory of Liquids”, Oxford University Press, London (1947).Google Scholar
  12. 12.
    Yu. V. Afanasev and O.N. Krokhin, Sov. Phys. JETP 25, #4 (Oct. 1967).Google Scholar
  13. 13.
    E. Goldman, Numerica1 Modeling of Laser Produced Plasmas, One-Dimensional Fluid-In-Cell Model, Lab. for Laser Energetics Report No. 6 and No. 12 University of Rochester, Rochester, New York.Google Scholar
  14. 14.
    W.L. Weise, M.W. Smith, and B.M. Glennon, Atomic Transition Probabilities, NSRDS-NBS4, Vol. 1, U.S. Gov’t.Printing Office, Washington, D.C., 1966.Google Scholar
  15. 15.
    J. Dawson and C. Oberman, Phys. Fluids 5, 517 (1962).MathSciNetADSCrossRefMATHGoogle Scholar
  16. 16.
    H.R. Griem, Plasma Spectroscopy, McGraw-Hill, New York, 1964.Google Scholar
  17. 17.
    R.W.P. McWhirter, Spectral Intensities, in Plasma Diagnostic Techniques (R.H. Huddleston and S.L. Leonard Eds.) Academic Press, New York, 1965, p.201.Google Scholar
  18. 18.
    R.F. Post, Plasma Physics 3, 273 (1961).Google Scholar
  19. 19.
    R.C. Elton, Atomic Processes, in Methods of Experimental Physics (H.R. Griem and R.H. Lovberg Eds.) Academic Press, New York, 1970, Vol. 9A, p. 115.Google Scholar
  20. 20.
    R.C. Elton, Determination of Electron Temperatures Between 50 eV and 100 Kev X-Ray Continuum Radiation in Plasmas, Naval Research Laboratory, NRL Report 6738, Washington, D. C. (1968).Google Scholar
  21. 21.
    N.G. Basov, et al., zhETF Pis. Red. 13, 691 (1971); English translation JETP Lett. 13, 489 (1971); and J.W. Shearer, et al., Experimental Indications of Plasma Instabilities Induced by Laser Heating, Lawrence Radiation Laboratory Report UCRL-73489.ADSGoogle Scholar
  22. 22.
    M.J. Bernstein and G.G. Comisar, J. Appl. Phys. 41, 729 (1970).ADSCrossRefGoogle Scholar
  23. 23.
    T.C. Bristow, et al., High Intensity X-Ray Spectra and Stimulated Emission from Laser Plasmas, University of Rochester Report No. 10, Laser Energetics Laboratory (1972).Google Scholar
  24. 24.
    E. Goldman, Lab. for Laser Energetics Report No. 8, University of Rochester, Rochester, New York (1972). (Numerical Modeling of Laser Produced Plasmas: The Dynamics and Neutron Production in Dense Spherically Symmetric Plasmas.)Google Scholar

Copyright information

© Springer Science+Business Media New York 1972

Authors and Affiliations

  • M. Lubin
    • 1
  • J. Soures
    • 1
  • E. Goldman
    • 1
  • T. Bristow
    • 1
  • W. Leising
    • 1
  1. 1.Laboratory for Laser EnergeticsUniversity of RochesterRochesterUSA

Personalised recommendations