Skip to main content Accessibility help
×
Home

Theory of efficient shell implosions

  • Masakatsu Murakami (a1), Katsunobu Nishihara (a1) and Hideaki Takabe (a1)

Abstract

A theoretical model of spherical ablative implosion is presented. The implosion performances such as the target coupling efficiency are estimated from the aspect ratio and initial mass density of a target shell, provided the laser is fixed at moderate intensity for a given wavelength. The model is applied to the experimental results obtained for both plastic hollow shell targets and DT gas-filled GMB targets by use of the twelve-beam green GEKKO XII laser. In addition to the target coupling efficiency, it is shown for the gas-filled targets that the theoretical predictions of neutron yield, ion temperature, and fuel ρ and ρR are in good agreement with the experimental results. Reduction of neutron yields due to irradiation nonuniformity is also discussed, and 5% of absorption nonuniformity is found to be required for explaining the discrepancies in neutron yield between the experiments and the theory.

Copyright

References

Hide All
Ahlborn, et al. 1982 Phys. Fluids 25, 541.
Azechi, H. et al. 1987 Phys. Rev. Lett. 59, 2635.
Decoste, R. et al. 1979 Phys. Rev. Lett. 42, 1673.
Fabbro, R. et al. 1985 Phys. Fluids 28, 1463.
Felber, F. S. 1978 Phys. Rev. Lett. 39, 84.
Gardner, J. H. & Bodner, S. E. 1986 Phys. Fluids 29, 2672.
Hattori, F. et al. 1986 Phys. Fluids 29, 1719.
Max, C. E. et al. 1983 Nucl. Fusion 23, 131.
Mayer, F. J. et al. 1983 Phys. Fluids 26, 1673.
Mima, K. et al. 1983 ILE Quarterly Progress Report, Osaka Univ., ILE-QPR-83–7, p. 28.
Murakami, M. & Nishihara, K. 1987 Jpn. J. Appl. Phys. 26, 1132.
Miyanaga, N. 1987 private communication.
Nakai, S. et al. 1988 ILE Quarterly Progress Report, Osaka Univ., ILE-QPR-88–25.
Nishihara, K. 1982 Jpn. J. Appl. Phys. 21, L571.
Nishimura, H. et al. 1986 Can. J. Phys. 64, 986.
Nishihara, K. et al. 1987 Proc. 8th International Workshop on Laser and Related Plasma Phenomena.
Takabe, H. et al. 1978 J. Phys. Soc. Jpn. 45, 2001.
Takabe, H. et al. 1988 Phys. Fluids to be published.
Yabe, T. 1987 ILE Research Report, Osaka Univ., ILE8708P.
Yamanaka, C. et al. 1986 Nucl. Fusion 27, 19.

Related content

Powered by UNSILO

Theory of efficient shell implosions

  • Masakatsu Murakami (a1), Katsunobu Nishihara (a1) and Hideaki Takabe (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.