Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-25T15:49:39.575Z Has data issue: false hasContentIssue false
  • English
  • Français

Radiation-driven cannonball targets for high-convergence implosions

Published online by Cambridge University Press:  09 March 2009

H. Nishimura ,
H. Shiraga ,
T. Endo ,
H. Takabe ,
M. Katayama ,
Y. Oshikane ,
M. Nakamura ,
Y. Kato  and
S. Nakai
H. Nishimura
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565, Japan
H. Shiraga
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565, Japan
T. Endo
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565, Japan
H. Takabe
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565, Japan
M. Katayama
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565, Japan
Y. Oshikane
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565, Japan
M. Nakamura
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565, Japan
Y. Kato
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565, Japan
S. Nakai
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565, Japan
Get access Rights & Permissions [Opens in a new window]

Abstract

In the last few years, systematic studies on radiation hydrodynamics in the X-ray confining cavity and a fuel capsule have attained remarkable progress. This makes it possible to analyze quantitatively the energy transfer processes from laser to the fusion capsule and find uniform irradiation conditions of the fusion capsule driven by thermal X rays. As a result, reproducible and stable implosions were achieved. Throughout implosion experiments with the Gekko XII blue laser system (351 nm, kJ, 0.8 ns), good agreement of implosion has been obtained between the experiment and numerical simulations, assuming perfectly spherical symmetry, up to a radial convergence ratio of 15. Described are particularly the issues of (1) energy transfer processes from laser to a fuel capsule and conditions for uniform irradiation, (2) properties of the X-ray propagation through aluminum heated by X-ray radiation, and (3) dependence of the convergence ratio of Ri/Rf (where Ri and Rf are the initial and final radii) of the capsule on the initial fill pressure of D–T gas and its influence on the core parameters and fusion products to evaluate implosion sphericity.

Type
Research Article
Information
Laser and Particle Beams , Volume 11 , Issue 1 , March 1993 , pp. 89 - 96
Copyright
Copyright © Cambridge University Press 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Endo, T. et al. 1988 Phys. Rev. Lett. 60, 1022.CrossRefGoogle Scholar
Endo, T. et al. 1990 Phys. Rev. A 42, 918.CrossRefGoogle Scholar
Kato, Y. et al. 1990 In Proceedings of the 13th International Conference on Plasma Physics and Controlled Nuclear Fusion Research, IAEA, Vienna, 3, 89.Google Scholar
Katayama, M. et al. 1991 Rev. Sci. Instrum. 62, 124.CrossRefGoogle Scholar
Murakami, M. & Meyer-Ter-Vehn, J. 1991a Nucl. Fusion 31, 1315.CrossRefGoogle Scholar
Murakami, M. & Meyer-Ter-Vehn, J. 1991b Nucl. Fusion 31, 1333.CrossRefGoogle Scholar
Nakamura, M. et al. 1992 Laser Particle Beams 10, 421.CrossRefGoogle Scholar
Nishimura, H. et al. 1990 Kakuyugo Kenkyu. 63, 219 (in Japanese).Google Scholar
Nishimura, H. et al. 1991 Phys. Rev. A 43, 3073.CrossRefGoogle Scholar
Takabe, H. et al. 1985 Phys. Fluids 28, 3676.CrossRefGoogle Scholar
Takabe, H. et al. 1988 Phys. Fluids 31, 2884.CrossRefGoogle Scholar