(Color). A schematic of the initial fuel assembly for this fast ignition study. The blue represents a spherical mass of compressed fuel. The black is the simulation geometry representing the limit of a large spherical mass. The red region is the hot spot generated by the deposition of energetic particles (electrons or ions) in the dense DT fuel.
A snapshot at 30 ps into a typical simulation (, , and ), (a) contour of the ion temperature, and (b) a contour of the DT density. Note that the initial DT mass was hemispherical with as depicted in Fig. 1, but only the region of interest is shown.
The DT density and ion temperature plotted as a function of for the same simulation as depicted in Fig. 2 and at the same time.
(a) The fusion power and (b) the ion and electron temperatures are plotted as a function of time for the same simulation as Figs. 2 and 3.
(Color). The hot spot fusion gain is plotted as a function of for simulations with initial DT densities of 50, 100, 200, and .
(Color). The hot spot fusion gain is plotted as a function of the heating pulse length for simulations with initial DT densities of 50, 100, 200, and .
(a) The optimal pulse length and (b) minimum energy required for , , are plotted as a function of the initial DT density with diamonds. Fits to the results are also plotted as dashed curves.
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