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基于新建成的神光Ⅲ主机装置开展了首次激光间接驱动内爆集成实验。国内首次采用多环脉冲整形激光注入黑腔产生X光辐射驱动内爆,通过优化激光打靶参数控制驱动不对称性,演示了以惯性压缩为主、收缩比约15倍的DT靶丸内爆实验能力,实现了准一维的高静产额(YOC)和高中子产额的物理指标;其中,真空黑腔DT靶丸最高中子产额为1.9×1012,YOC达到60%;充气黑腔DT靶丸最高中子产额为2.4×1012,YOC大约70%。该实验为未来开展多台阶整形辐射驱动、更高倍数收缩比的高压缩内爆综合实验、验证点火靶物理设计和关键调控措施有效性奠定了基础。
Based on the newly built SG-III host device, an impulse integration experiment of the first laser indirect drive was carried out. The first domestic use of multi-ring pulsed laser injection of black cavity to generate X-ray radiation-driven implosion, driven by optimizing the laser targeting parameters to control the drive asymmetry, demonstrating the inertial compression, shrinkage ratio of about 15 times the DT capsule implosion test (YOC) and high neutron yield. The highest neutron yield of vacuum black cavity DT target was 1.9 × 1012 and the YOC was 60%. The inflatable black cavity The highest neutron yield of DT pellets was 2.4 × 1012 and the YOC was about 70%. The experiment lays the foundation for carrying out high-compression implosion synthesis experiment driven by multi-stage shaping radiation and higher multiple contraction ratio in the future and verifying the physical design of ignition target and the effectiveness of key control measures.