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Numerical modelling of radiation Marshak Waves

Published online by Cambridge University Press:  09 March 2009

N. A. Tahir  and
K. A. Long
N. A. Tahir
Affiliation:
Institut für Neutronenphysik und Reaktortechnik, Kernforschungszentrum Karlsruhe, Postfach 3640, D-7500 Karlsruhe, Federal Republic of Germany
K. A. Long
Affiliation:
Institut für Neutronenphysik und Reaktortechnik, Kernforschungszentrum Karlsruhe, Postfach 3640, D-7500 Karlsruhe, Federal Republic of Germany
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Abstract

In this paper we discuss the importance of radiation transport in inertial confinement fusion (ICF) target design. It is shown that a self similar solution of non-linear heat conduction can be used to estimate the penetration depth of radiation thermal waves (Marshak Waves) in ion-beam ICF pellets. An improved numerical treatment of non-linear heat conduction has been incorporated into the hydrodynamic code MEDUSA-KA to simulate radiation transport in ICF target design studies. The numerical results have been checked against self-similar solutions and a comparison between the two is presented in this paper. We find good agreement between the two. The necessity of using a high-z radiation shield to protect the fuel from radiative preheat is also discussed.

Type
Research Article
Information
Laser and Particle Beams , Volume 2 , Issue 3 , August 1984 , pp. 371 - 381
Copyright
Copyright © Cambridge University Press 1984

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