Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-25T04:35:43.117Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of neutron heating on ignition and energy gain of laser-imploded D-T pellets

Published online by Cambridge University Press:  09 March 2009

T. Johzaki ,
Y. Nakao ,
H. Nakashima ,
H. Takabe ,
A. Oda  and
K. Kudo
T. Johzaki
Affiliation:
Department of Nuclear Engineering, Kyushu University, Hakozaki, Fukuoka 812, Japan
Y. Nakao
Affiliation:
Department of Nuclear Engineering, Kyushu University, Hakozaki, Fukuoka 812, Japan
H. Nakashima
Affiliation:
Department of Energy Conversion Engineering, Kyushu University, Kasuga, Fukuoka 816, Japan
H. Takabe
Affiliation:
lnstitute of Laser Engineering, Osaka University, Suita, Osaka 565, Japan
A. Oda
Affiliation:
Department of Nuclear Engineering, Kyushu University, Hakozaki, Fukuoka 812, Japan
K. Kudo
Affiliation:
Department of Nuclear Engineering, Kyushu University, Hakozaki, Fukuoka 812, Japan
Get access Rights & Permissions [Opens in a new window]

Abstract

On the basis of coupled neutronic/hydrodynamic calculations, we examine the neutron heating effects on the ignition and burn propagation in laser-imploded D-T pellets. The fusionproduced neutrons deposit their energy all over the pellet region since the mean-free-path of the neutron is long. The fraction of neutron energies deposited to the central spark region during the ignition phase is too small to reduce the threshold energy of the laser for ignition. In the burn phase, the neutron heating decreases the maximum compression ratio and accelerates the plasma expansion. The inclusion of neutron heating hence decreases the pellet gain from the value in the case without neutron heating. Calculations neglecting the transport of neutron recoils overestimate the neutron heating rate in the reactor-grade pellets.

Type
Regular Papers
Information
Laser and Particle Beams , Volume 15 , Issue 2 , June 1997 , pp. 259 - 276
Copyright
Copyright © Cambridge University Press 1997

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

Atzeni, S. 1987 Plasma Phys. Controll. Fusion 29, 1535.CrossRefGoogle Scholar
Banes, J.F. 1966 Phys. Rev. 153, 269.CrossRefGoogle Scholar
Christiansen, J.P. et al. 1974 Comput. Phys. Commun. 7, 271.CrossRefGoogle Scholar
Cowan, R.D. 1956 Phys. Rev. 105, 144.CrossRefGoogle Scholar
Goel, B. & Höbel, W. 1985 Proc. 10th Int. Conf. on Plasma Physics and Controlled Nuclear Fusion Research, 1984, London (IAEA, Vienna), Vol. 3, p. 345.Google Scholar
Haldy, P.A. & Ligou, J. 1977 Nucl. Fusion 17, 1225.CrossRefGoogle Scholar
Honda, T. et al. 1991 Nucl. Fusion 31, 851.CrossRefGoogle Scholar
Honrubia, J.J. 1993 Nuclear Fusion by Inertial Confinement Fusion, Velarde, G.Ronen, Y. and Martinez-Val, J.M., eds. (CRC Press, Boca Raton, FL), Ch. IX.Google Scholar
Kidder, R.E. 1979 Nucl. Fusion 19, 223.CrossRefGoogle Scholar
Kosaki, Y. et al. 1994 Proc. 7th Int. Conf. on Emerging Nuclear Energy Systems, 09 1993, Chiba, Japan (World Scientific, Singapore), p 76.Google Scholar
Martinez-Val, J.M. 1990 Fusion Technol. 17, 476.CrossRefGoogle Scholar
Meyer-Ter-Vehn, J. 1982 Nucl. Fusion 22, 561.CrossRefGoogle Scholar
More, R.M. et al. 1988 Phys. Fluid 31, 3059.CrossRefGoogle Scholar
Nakao, Y. et al. 1993a J. Nucl. Sci. Technol. 30, 18.CrossRefGoogle Scholar
Nakao, Y. et al. 1993b J. Nucl. Sci. Technol. 30, 1207.Google Scholar
Nakao, Y. et al. 1996 Proc. 1996 Int. Conf. on Plasma Physics, 09 1996, Nagoya, Japan, p. 1774.Google Scholar
Nozaki, K. & Nishihara, K. 1977 J. Phys. Soc. Japan 43, 1393.CrossRefGoogle Scholar
Seki, Y. & Iida, H. 1980 Coupled 42-group neutron and 21-group gamma-ray cross section sets for fusion reactor calculations, JAERI-M 8818.Google Scholar
Shiba, T. et al. 1987 Nucl. Fusion 27, 589.CrossRefGoogle Scholar
Takabe, H. & Mima, K. 1987 Institute of Laser Engineering, Osaka University Research Report ILE-8713P.Google Scholar
Takabe, H. et al. 1994 Proc. 7th Int. Conf. on Emerging Nuclear Energy Systems, 09 1993, Chiba, Japan (World Scientific, Singapore), p. 101.Google Scholar
Takabe, H. 1997 Laser and Part. Beams (submitted).Google Scholar
Velarde, G. et al. 1985 Trans. Am. Nucl. Soc. 49, 118.Google Scholar
Wienke, B.R. 1974 Phys. Fluids 17, 1135.CrossRefGoogle Scholar
Zel'dovich, Ya.B. & Raizer, Yu.P. 1966 Physics of Shock Waves and High Temperature Hydrodynamic Phenomena (Academic Press, New York), Ch. III.Google Scholar
Zinamon, Z. 1993 Nuclear Fusion by Inertial Confinement Fusion, Velarde, G.Ronen, Y.Martinez-Val, J.M. eds. (CRC Press, Boca Raton, FL), Ch. V.Google Scholar