论文部分内容阅读
在神光Ⅲ主机装置上,利用已经建成的两个激光束组,开展了激光间接驱动内爆物理磨合实验,是神光Ⅲ主机装置首次出中子实验。实验采用1400μm×2100μm黑腔,500μm的塑料靶丸充1 MPa的DD燃料,激光从黑腔两端55°注入。实验获得的最高中子产额为9.7×108。实验结果表明,实验黑腔的耦合效率约为50%;使用的黑腔偏长,靶丸被压缩为“薄饼形”;中子产额和激光能量正相关;中子发射峰值时刻主要依赖于烧蚀层厚度。
In the SG-Ⅲ host device, the implosion physical experiment of laser indirect drive implosion is carried out by using the two laser beam groups already built, which is the first neutron experiment of the SG-Ⅲ mainframe device. Experiments using 1400μm × 2100μm black cavity, 500μm plastic pellets filled with 1 MPa of DD fuel, laser from the black cavity at both ends of 55 ° injection. The highest neutron yield obtained from experiments was 9.7 × 108. The experimental results show that the coupling efficiency of the experimental black cavity is about 50%, the length of the used black cavity is too long, the target pill is compressed into “pancake shape”, the neutron yield is positively correlated with the laser energy, and the time of neutron emission peak is mainly Depends on ablation layer thickness.