强激光与粒子束, 2015, 27 (9): 092008, 网络出版: 2015-11-30  

神光Ⅲ主机双束组激光间接驱动内爆实验研究

Experimental study on laser indirect-drive implosionwith double quads on SGⅢ facility
作者单位
中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
摘要
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1400 μm×2100 μm黑腔,500 μm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。
Abstract
The implosion experiment with double quads on SGⅢ facility was the first time laser indirect-drive implosion experiment, also the first time neutron experiment. The experiments used 1400 μm×2100 μm hohlraum with 1000 μm LEH and 500 μm CH target with 1 MPa DD fuel, and the laser was injected the hohlraum by 55 °. The highest neutron yield was 9.7×108, up to now, the highest indirect-drive DD neutron yield in domestic experiment. The experimental results show that the coupling efficiency of the hohlraum approximates 50%; the hohlraum is too long, and the pellet is compressed to a “pancake”; neutron yield is positively correlated with the laser energy; the Bang Time depends on the thickness of the ablative layer.
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余波, 黄天晅, 李三伟, 陈家斌, 蒋炜, 陈伯伦, 蒲昱东, 晏骥, 景龙飞, 李志超, 唐琦, 宋仔峰, 詹夏雨, 江少恩. 神光Ⅲ主机双束组激光间接驱动内爆实验研究[J]. 强激光与粒子束, 2015, 27(9): 092008. Yu Bo, Huang Tianxuan, Li Sanwei, Chen Jiabin, Jiang Wei, Chen Bolun, Pu Yudong, Yan Ji, Jing Longfei, Li Zhichao, Tang Qi, Song Zifeng, Zan Xiayu, Jiang Shaoen. Experimental study on laser indirect-drive implosionwith double quads on SGⅢ facility[J]. High Power Laser and Particle Beams, 2015, 27(9): 092008.

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