Optimum Design of Exploding Pusher Target to Produce Maximum Neutrons

摘要

Exploding pusher target experiments have been conducted with the 1.052- mu m GEKKO MII two-beam glass laser system to design an optimum target, which couples to the incident laser light most effectively to produce the maximum neutrons. Since hot electrons preheat the shell entirely in spite of strongly nonuniform irradiation, a simple model can design the optimum target, of which the shell/fuel interface is accelerated to 0.5 to 0.7 times the initial radius within a laser pulse. A 2-dimensional computer simulation supports this target design. The scaling of the neutron yield N with the laser power P is N proportional to P/sup 2.4+-0.4/. (ERA citation 12:040186)