Efficiency of radiation energy confinement in Double Liner/Dynamic Hohlraum

The phenomenon of energy confinement of the thermal X-ray radiation in a cylindrical cavity formed by the plasma shells of the Double Liner/Dynamic-Hohlraum used in HEDP and ICF is considered. The enhancement of the radiation intensity due to trapping of radiation generated by the shock wave during the impact of the liners is examined. Radiation transport together with level kinetics appropriate for the non-LTE plasmas created in such system is simulated. It is shown that the use of special admixtures of atomic species increases the radiation confinement efficiency and energy flux onto the target. On the basis of the developed physical model of non-LTE plasma with help of RMHD code ZETA, the modeling of the dynamics of liners and generation of radiation in two-dimensional cylindrical geometry is performed. Influence of non-homogeneities of liners and Rayleigh-Taylor instability on the radiation energy confinement efficiency is evaluated.