Researches on stagnation of ablated material from liquid wall of laser fusion reactor

用实验和数值方法研究了在液体壁激光聚变反应堆中熔化燃烧后烧蚀金属蒸气的行为。在实验中，用放电加热薄铅膜，在见证板上对蒸发金属进行校正。气溶胶的直径约为30nm，与数值结果一致。数值模拟结果表明，在熔合燃烧后的停滞点，由于与燃烧室另一侧的反羽流碰撞，在熔合燃烧后6ms形成了直径为60cm的堆芯。岩心气溶胶的数量密度约为10^<11>n/cm^3。气溶胶也会与来自另一侧的气溶胶发生碰撞，并在核心处停滞。

Behavior of ablated metal vapor after a fusion burn in a laser fusion reactor with a liquid wall was studied experimentally and numerically. In the experiment, thin Pb membrane was heated with electric discharge and evaporated metal was corrected on a witness plate. The diameter of aerosols was about 30nm which agreed with numerical results. The numerical simulation showed that a 60cm-diameter-core was formed 6ms after the fusion burn at the stagnation point due to collision with counter plume from the other side of the chamber. The number density of aerosols in the core was about 10^<11>n/cm^3. Aerosols also collide with those from the other side and stagnate in the core.