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Numerical method for finding uniform irradiation conditions of a fusion capsule driven by X-ray radiation

Published online by Cambridge University Press:  09 March 2009

M. Nakamura ,
K. Kondo ,
H. Nishimura ,
T. Endo ,
H. Shiraga ,
S. Miyamoto ,
Y. Kato  and
S. Nakai
M. Nakamura
Affiliation:
Institute of Laser Engineering, Osaka University, 2–6 Yamada-Oka, Suita, Osaka 565, Japan
K. Kondo
Affiliation:
Institute of Laser Engineering, Osaka University, 2–6 Yamada-Oka, Suita, Osaka 565, Japan
H. Nishimura
Affiliation:
Institute of Laser Engineering, Osaka University, 2–6 Yamada-Oka, Suita, Osaka 565, Japan
T. Endo
Affiliation:
Institute of Laser Engineering, Osaka University, 2–6 Yamada-Oka, Suita, Osaka 565, Japan
H. Shiraga
Affiliation:
Institute of Laser Engineering, Osaka University, 2–6 Yamada-Oka, Suita, Osaka 565, Japan
S. Miyamoto
Affiliation:
Institute of Laser Engineering, Osaka University, 2–6 Yamada-Oka, Suita, Osaka 565, Japan
Y. Kato
Affiliation:
Institute of Laser Engineering, Osaka University, 2–6 Yamada-Oka, Suita, Osaka 565, Japan
S. Nakai
Affiliation:
Institute of Laser Engineering, Osaka University, 2–6 Yamada-Oka, Suita, Osaka 565, Japan
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Abstract

A three-dimensional model to calculate X-ray intensity distribution on an indirectly driven fusion target is presented. The model includes conversion of laser light into X rays, radiation reemission from X-ray-heated wall of a cavity, and influence of an inner pellet (i.e., a fuel capsule) on radiation redistribution. Intensity distribution of an X ray inside a cylindrical cavity heated by intense blue laser light (wavelength 351 nm, energy 5.2 kJ, duration 0.7 ns) was determined by measuring a burn-through signal from a diagnostic foil integrated onto the cavity. The experimental result is well replicated by the model calculation. By using this model, optimum conditions for uniform irradiation of afusion capsule by X-ray radiation are evaluated for use in Gekko XII laser fusion experiments.

Type
Research Article
Information
Laser and Particle Beams , Volume 10 , Issue 3 , September 1992 , pp. 421 - 433
Copyright
Copyright © Cambridge University Press 1992

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