Laser Fusion Experiments Using Spherical Shell Targets

  • Roy R. Johnson
  • Peter Hammerling
  • Frederick J. Mayer


Laser-driven implosion experiments using DT-gas-filled spherical glass-shell targets are described. Neutron yields to 5 × 107 are produced from implosions of small(̴ 55-µm-diameter) targets spherically illuminated with an on-target laser power of 0.5 terawatt. Nuclear reaction product diagnostics, X-ray pinhole photographs, fast-ion spectra and X-ray measurements are used in conjunction with hydrodynamic computer code simulations to investigate the implosion phenomenology as well as the target corona evolution. Simulations using completely classical effects are not able to describe the full range of experimental data. The presence of preheat may be required to explain some implosion measurements.


Alpha Particle Neutron Yield Pinhole Camera Neutron Production Anomalous Absorption 


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  1. 1.
    C.E. Thomas, Appl. Opt. 14 (1975) 1267.ADSCrossRefGoogle Scholar
  2. 2.
    G. Charatis, J. Downward, R. Goforth, B. Guscott, T. Henderson, S. Hildum, R. Johnson, K. Moncur, T. Leonard, F. Mayer, S. Segall, L. Siebert, D. Solomon, and C. Thomas, Plasma Physics and Controlled Nuclear Fusion Research (Proc. Int. Conf. Tokyo, 1974) IAEA, Vienna (1975) 314.Google Scholar
  3. 3.
    C.E. Thomas, L.D. Siebert, Appl. Opt. 15 (1976) 462.ADSCrossRefGoogle Scholar
  4. 4.
    D.E. Solomon, T.M. Henderson, J. Phys. D: Applied Physics 8 (1975) L85.ADSCrossRefGoogle Scholar
  5. 5.
    T.M. Henderson, R.B. Jacobs, D.E. Solomon and G.H. Wuttke, Advances in Cryogenic Engineering 21 (1975).Google Scholar
  6. 6.
    Data Report on Task C-7, KMSF Report U463 (Jan. 1976, unpublished).Google Scholar
  7. 7.
    D.C. Slater and F.J. Mayer, Bull. Am. Phys. Soc. 21 (1976) 1194. KMSF Report U534 (1976).Google Scholar
  8. 8.
    D.C. Slater and F.J. Mayer “Laser Interaction and Related Plasma Phenomena” (Plenum Press, New York, 1977), these Proceedings, pp. 603–618; KMSF Report U568 (1976).Google Scholar
  9. 9.
    F.J. Mayer, G.R. Montry, E. Benn, Advances in X-Ray Analysis, Plenum Press, New York (1975) Vol. 18, p. 169.CrossRefGoogle Scholar
  10. 10.
    F.J. Mayer, L.D. Siebert and J. Simpson, KMSF Report U437 (1976).Google Scholar
  11. F.J. Mayer and W.B. Rensel, J. Appl. Phys. 47 (1976) 1491.Google Scholar
  12. 11.
    R.R. Goforth, F.J. Mayer, H. Brysk, R.A. Cover, J. Appl. Phys. 47 (1976) 4850.ADSCrossRefGoogle Scholar
  13. 12.
    P. Hammerling and R. Osborn, KI-ISF Report U148 (unpublished) 1972.Google Scholar
  14. 13.
    T.M. Henderson and R.R. Johnson, KMSF Report U576 (1976).Google Scholar
  15. 14.
    N.K. Moncur, KMSF Report U528 (unpublished) 1976.Google Scholar
  16. 15.
    R.J. Bickerton, Nuclear Fusion 13, 457 (1973).CrossRefGoogle Scholar
  17. 16.
    R.C. Malone, R.L. McCrory and R.L. Morse, Phys. Rev. Lett. 34 (1975) 721.ADSCrossRefGoogle Scholar
  18. 17.
    W.M. Manheimer, Lawrence Livermore Laboratory Report UCRL-77149 (1975).Google Scholar

Copyright information

© Plenum Press, New York 1977

Authors and Affiliations

  • Roy R. Johnson
    • 1
  • Peter Hammerling
    • 1
  • Frederick J. Mayer
    • 1
  1. 1.KMS Fusion, Inc.Ann ArborUSA

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