Model Analysis And Experimental Study Of The Radiation Temperature Of The Hohlraum X-ray Radiation

X-ray confinement and energy redistribution in a hohlraum is one of the foremost problems in the indirect-drive approach to inertial confinement fusion (ICF). The mass and energy conservation equations of the ablated material by thermal radiation are derived from the self-similar solution for ablative heat wave (ALIW). The heating processes of different wall elements are coupled with the view-factor method and a similarity solution is obtained for an X-ray heated hohlraum by means of dimensional analysis. We numerically calculate the temporal evolutions of the flux enhancement factor in a hohlraum, the energy transfer efficiency via a thermal capillary and energy redistribution inside a hohlraum for different parametric conditions. A brief introduction is given to the calibration results of X-ray detectors on the synchrotron radiation (SR) facility and the scaling experiments for hohlraum temperature on the Shengguang- II laser facility (1 .053p.m). At last, the numerical results of the modeling analysis are compared with the experimental results.