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Requirement of uniformity for fuel ignition and uniformity in high neutron yield implosion

Published online by Cambridge University Press:  09 March 2009

H. Takabe ,
K. Mima  and
S. Nakai
H. Takabe
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565 Japan
K. Mima
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565 Japan
S. Nakai
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565 Japan
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Abstract

An ignition condition for a compressed DT sphere is studied by the use of balance relation between a heating term (alpha-particle heating) and cooling terms (expansion, radiation, and electron heat conduction). The resultant condition was compared with the model simulation carried out by Fraley et al. (1974). Effect of implosion uniformity is one of the most important elements in evaluating the laser energy required for fuel ignition. Increase of the laser energy as a function of implosion nonuniformity is shown. For a self-consistent study of implosion dynamics, a two-dimensional fluid code is developed and used for analyzing the recent high neutron yield experiment (Takabe et al. 1988). Two-dimensional fluid dynamics driven by laser irradiation nonuniformity is studied to explain the difference between the experimental result and the result of 1-D fluid simulation.

Type
Research Article
Information
Laser and Particle Beams , Volume 7 , Issue 2 , May 1989 , pp. 175 - 187
Copyright
Copyright © Cambridge University Press 1989

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References

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