Obviously, the blanket thickness increased linearly as the deposition time increased, and the sidewall thickness almost increased linearly with increasing blanket thickness.
The blanket thicknesses (normal growth on substrates without patterns) were experimentally plotted as a function of time (Fig. 4a), and the experimental results of the sidewall thickness were plotted as a function of the blanket thickness (Fig. 4b).
Fig. 4 Changes of a blanket thickness as a function of deposition time and b sidewall thickness as a function of blanket thickness using a 400 nm square pattern.
The most critical free parameter in this stage is the blanket thickness, as a function of the 6Li enrichment.
Spectral shifter and reflector are utilized to improve the blanket shielding capability and energy multiplication, and to reduce the radial blanket thickness.
There are many options to be considered in the engine design including target yield, U-to-C ratio in the fuel, fission blanket thickness, etc.
The aim of the analysis was to minimize the radial blanket thickness, while ensuring tritium self-sufficiency and to assess the shielding performance of the reactor in terms of the radiation loads to the super-conducting toroidal field (TF) coils.
The result indicated that, under the constraint of the blanket thickness being less than 0.5 m, the mixture of Li2O pebbles and Be12Ti ones is the most effective and that the TBR is expected to be greater than 1.05.
This permits an estimate to be made with ease of the blanket thickness that is necessary to reduce the intensity of the diffraction radiation to levels that are comparable to the background acoustic radiation produced directly by the turbulence quadrupole sources in the boundary layer.
Although both configurations are feasible, the latter design solution was shown to provide a superior performance in terms of the required blanket thickness, the beryllium inventory and the 6Li enrichment due to a better utilisation of the space available for the breeder and the beryllium pebbles.
