Nonuniform Energy Concentration in Focused Plasmas

  • W. H. Bostick
  • V. Nardi
  • W. Prior
  • F. Rodriguez-Trelles
  • C. Cortese
  • W. Gekelman


The dynamics of the dense plasma column (~ 1020 particles/cm3) produced in a deuterium plasma focus experiment is studied by the emission spectrum from hard x-rays to infrared and microwaves. A maximum of space and time resolution shows energy lumping within time and space intervals Δτ ~ 1 – 5 ns Δℓ ~ 0.1–0.5 mm. This energy granulation involves a fraction ~ 10% of the energy of the whole system and occurs by localized conversion of magnetic field energy into particle energy. The non-thermal distribution of ions and electrons as it is derived from radiation anisotropy and polarization, fits the observed beaming of electrons and ions that is observed by other methods (including anisotropy measurements of the neutron emission).


Focus Plasma Neutron Yield Plasma Region Current Sheath Magnetic Field Energy 
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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    W. H. Bostick, V. Nardi, W. Prior, J. Plasma Phys. 8 (1972) p. 7.CrossRefGoogle Scholar
  2. 2.
    W. H. Bostick, V. Nardi, W. Prior, Proc. 6-th Fur. Conf. Controlled Fusion and Plasma Phys., Moscow 1973; Vol. 2. p. 395. FWHM = full width half maximum.Google Scholar
  3. 3.
    H. Conrads, D. Gollwitzer, H. Schmidt, same as Ref. 2, Vol. 1, p. 367.Google Scholar
  4. 4.
    R. S. Post, Ph. D. Thesis 1973, Plasma Lab., Columbia Univ. Rep. No. 59, 1973, New YorkGoogle Scholar
  5. 5.
    W. H. Bostick, V. Nardi, W. Prior, Annals N. Y. Acad. of Sci., Vol. 251, Proc. Conf. Plasma Confinement and Relativistic Electron Beams, N. Y., March 1974, p. 2.Google Scholar
  6. W. H. Bostick, V. Nardi, W. Prior, Annals N. Y.: Proc. Int. Conf. Physics in High Magnetic Fields, Grenoble, Sept. 1974, C.N.R.S. edit.Google Scholar
  7. 6.
    W. H. Bostick, V. Nardi, W. Prior, F. Rodriguez-Trelles: Proc. 2-nd Conf. Pulsed High-Beta Plasmas, Garching, July 1972, W. Lotz edit., p. 155.Google Scholar
  8. Same authors: Proc. 5-th Fur. Conf. Controlled Fusion Plasma Phys., Grenoble 1972, C.F.A. edit., Vol. I, p. 70, Vol. 2, p. 239.Google Scholar
  9. 7.
    C. Patou, A. Simmonet, J. P. Watteau; Phys. Lett. 29A, 1, (1969).Google Scholar
  10. 8.
    J. H. Lee, L. P. Shomo, M. D. Williams, H. Hermandsdorfer; Phys. Fluids, 14, 2217 (1971).CrossRefGoogle Scholar
  11. 9.
    V. S. Imshennik, N. V. Filippov, T. I. Filippova; Nuclear Fusion 13, 929 (1973).CrossRefGoogle Scholar
  12. 10.
    A. Bernard, A. Ccudeville, J. Durantet, A. Jolas, J. Launspach, J. de Mascureau, J. P. Watteau; Proc. 2-nd Conf. Pulsed High-Beta Plasmas, Garching 1972, W. Lotz edit. p. 147.Google Scholar
  13. 11.
    W. H. Bostick, L. Grunberger, V. Nardi, W. Prior; Proc. Int. Conf. Thermophys. Properties,Newton, Mass. 1970, American Assoc. Mech. Fng. p. 495.Google Scholar
  14. 12.
    N. J. Peacock, M. G. Hobby, P. D. Morgan: Proc. 4-th Conf. Plasma Phys. Controlled Nuclear Fusion Research, Madison 1971, I.A.E.A. edit. p. 537.Google Scholar
  15. 13.
    W. H. Bostick, V. Nardi, W. Prior: Prof. Conf. Dynamics of Ionized Gases, Tokyo 1971, Univ. of Tokyo Press, p. 375.Google Scholar
  16. 14.
    W. H. Bostick, V. Nardi, W. Prior: Proc. 5-th Conf. Plasma Phys. Controlled Nuclear Fusion Research, Tokyo 1974, in press.Google Scholar
  17. 15.
    H. D. Young: Statistical Treatment of Experimental Data; Mc Graw-Hill, New York 1962.Google Scholar
  18. 16.
    J. D. Heaps: Corporate Research Center, Honeywell Inc., Bloomington, Minnesota 55426.Google Scholar
  19. 17.
    This agrees also with findings of other laboratories: M. J. Bernstein (Aerospace), Proc. 4-th Conf. on Plasma Physics and Controlled Nuclear Fusion Research, Madison 1971; IAEA edit. 1971, Vol. 1, p. 572 (discussion of papers CN-28/D-3,D-4, D-5).Google Scholar
  20. R. L. Gullickson and R. H. Barlett (Lawrence Livermore Lab.), Advances in X-ray Analysis Vol. 18, Plenum Press, New York 1974. p. 186 (Proc. 23-rd Annual Conf. on Application of X-ray Analysis, Denver August 7–9, 1974).Google Scholar

Copyright information

© Plenum Press, New York 1976

Authors and Affiliations

  • W. H. Bostick
    • 1
  • V. Nardi
    • 1
  • W. Prior
    • 1
  • F. Rodriguez-Trelles
    • 1
    • 2
  • C. Cortese
    • 3
  • W. Gekelman
    • 3
  1. 1.Stevens Institute of TechnologyHobokenUSA
  2. 2.Univ. of Buenos AiresArgentina
  3. 3.I.E.N.G.F.TorinoItaly

Personalised recommendations