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Radiation effect on pellet implosion and Rayleigh-Taylor instability in light-ion beam inertial confinement fusion

Published online by Cambridge University Press:  09 March 2009

S. Kawata ,
T. Sato ,
T. Teramoto ,
E. Bandoh ,
Y. Masubichi  and
I. Takahashi
S. Kawata
Affiliation:
Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka 940–21, Japan
T. Sato
Affiliation:
Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka 940–21, Japan
T. Teramoto
Affiliation:
Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka 940–21, Japan
E. Bandoh
Affiliation:
Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka 940–21, Japan
Y. Masubichi
Affiliation:
Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka 940–21, Japan
I. Takahashi
Affiliation:
Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka 940–21, Japan
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Abstract

The radiation transport effect on pellet implosion and the Rayleigh-Taylor (R-T) instability are studied in a light-ion beam (LIB) inertial confinement fusion (ICF) by numerical simulation and analytic work. First, we present the nonuniformity-smoothing effect of the radiation transport on implosion symmetry in an LIB ICF fuel pellet. The 2-D implosion simulation shows that the initial nonuniformity can be smoothed out well in an LIB ICF pellet; for example, the initial nonuniformity of 6% is smoothed to 0.07% during the implosion phase. In addition, linear analyses for the R-T instability under nonuniform acceleration in space and under radiation are also performed: The nonuniform acceleration field in space does not change the growth rate (γ) of the R-T instability. However, this nonuniformity may suppress the growth itself of the R-T instability. Radiation may reduc the growth rate (γ).

Type
Regular Papers
Information
Laser and Particle Beams , Volume 11 , Issue 4 , December 1993 , pp. 757 - 768
Copyright
Copyright © Cambridge University Press 1993

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