论文部分内容阅读
利用低温脉冲气阀获得了平均含有3×103氘原子的氘团簇。在飞秒激光装置上实现了氘团簇聚变,每发中子产额为1×103。中子产额对激光功率密度敏感,保持激光能量不变,随着激光焦斑的变大,DD聚变中子产额逐渐增加,最大值出现在激光焦斑为470μm时;继续增大激光焦斑,没有观察到中子信号。实验结果还表明激光氘团簇聚变发生的区域主要是激光辐照的等离子体热区,此区域内邻近氘团簇库仑爆炸发射的高能氘离子碰撞引发聚变反应。
Deuterium clusters with an average of 3 × 103 deuterium atoms were obtained by cryogenic pulse gas valves. Deuterium cluster fusion was achieved on a femtosecond laser device with a neutron yield of 1 × 10 3. The neutron yield is sensitive to the laser power density, keeping the laser energy constant. With the increase of the laser spot size, the output of DD fusion neutrons gradually increases, with the maximum value occurring when the laser spot size is 470μm. The laser coke Spot, no neutron signal observed. The experimental results also show that the laser deuterium cluster fusion occurs mainly in the laser-irradiated plasma hot zone. In this region, the high-energy deuterium ions emitted by the Coulomb explosions near the deuterium cluster collide to initiate the fusion reaction.