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printed in Northem Ireland



Abstract-Computer simulation results are presented utilizing an updated version of MEDUSA, a 1- D Lagrangian computer program, including radiation effects. These calculations show that, typically, the final compression of the target is reduced by up to a factor 6 due to radiation ditfusion. B THIS note we present simulation studies of laser-compression of solid carbon microspheres in order to study energy transport by total continuum radiation in medium-z plasmas. These simulation studies have been carried out using an updated version of MEDUSA, a single velocity, two temperature Lagrangian computer code written by ~~R”sEN et al. (1974). Our modified version of MEDUSA contains a steady state radiation physics package which handles the transport of continuum radiation arising from free-free and free-bound transitions in the plasma, using a dsusion approximation. The radiation field in this model is represented by a Planckian equilibrium distribution function corresponding to a radiation temperature T,. This equilibrium radiation field interacts with electrons as a function of the local temperature difference (T,- TJ, where To is the electron temperature. Further details of the physics and the numerical techniques used in this model are-given by TAHIR (1978.19791

Year: 1980
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