FIG. 5.

(Color online) t_tot for various values of t_unbound. The legend in (c) applies to all three plots. In each plot, the lines from top to bottom are for n_initial,BRW = 1 through 5, respectively. For negligible diffusion time (a), there are significant differences in the minimal times for varying n_initial,BRW. The minimal values are also shifted: For high n_initial,BRW, the system can afford to use low p and thus minimize t_het while retaining high r_H, while for low values of n_initial,BRW, higher values of p are required to keep r_H from getting too low. As we increase the values for t_unbound from (a) through (c), the differences between the curves for different n_initial,BRW become less significant. Furthermore, the minima shift to higher values of p and thus higher values of r_H, due to the higher cost for diffusion.