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(IFP/18) Simulations of ICF Hohlraum and Radiation Hydrodynamics in a Plastic Foil

N. K. Gupta¹⁾, T. C. Kaushik¹⁾, B. K. Godwal^1)
 
1) High Pressure Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400 085 (INDIA)

Abstract.  In this paper we study the effects of various parameters on the estimation of radiation temperature inside indirect drive ICF hohlraum and compare results with the published work. A multi group, 1-D, cylindrical geometry, radiation hydrodynamic code is used for this study. The radiation temperature inside a cylindrical hohlraum is seen to be strongly dependent on the number of frequency groups used. It is also seen that erroneous results can be obtained if the space mesh in the hohlraum wall is not fine enough. The spectrum of the radiation is also seen to be different from Planck, especially in the high-energy range. Hydrodynamics of a CHBr foil driven by the hohlraum radiation brings about the need of a proper equation of state model. A three term equation of state is used for these studies and data for CHBr is generated by scaling density, atomic number and weight of the high-density polysterene (CH)n to that of CHBr.

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