Optimization of beam configuration in laser fusion based on the laser beam pattern

摘要

A simple method based on the laser beam pattern is proposed and numerically demonstrated to optimize a beam configuration for direct drive laser fusion. In this method, both the geometrical factor G_l and the single beam factor B_l are considered. By diminishing the product of B_(l')G_l, the irradiation nonuniformity can be decreased to the order of 10~(-5). This optimization method can be applied on the design of irradiation systems for an arbitrary number of beams and any axially symmetric beam patterns.