8路神光Ⅱ装置在基频和三倍频条件下工作研究进展
Successful operation of 8 beam SG-Ⅱlaserfacility for both 1w 0 and 3w 0 output
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摘要: 简要描述在神光Ⅱ装置上进行的部分物理实验，为神光Ⅱ激光装置提供光学性能指标。神光Ⅱ激光装置已经能在三倍频、外转换效率高于60%的条件下常规输出三倍频能量。穿孔实验表明，蓝光(3w0)的光束质量，特别是远场旁瓣分布质量，甚至于要好于红光(1w0光)。用100ps脉冲宽度的红光输出打爆推内爆的氘氚球靶，获得单发最高中子产额4×109个。基频线聚焦打靶，获得类Ni银X光激光饱和输出，并成功应用于激光等离子体密度测量，观测到莫尔条纹移动。Abstract: SG-Ⅱlaser facility has recently been able to deliver 3w 0 (blue) light with the outer conversion efficiency of ≥60% during its routine operation. The pinhole injection experiment this year indicated the optical quality of the blue, especially the side lobe distribution, was even better than that of the red (1w 0). With the 100ps red light output, DT fuel exploding pusher experiment delivered the maximum neutron yields of 4×109 per shot. The red light line focus has led to the Ni like Ag X-ray laser's saturation and the successful observation of the Moire fringe deflection while the laser was applied to a separated laser plasmas. This paper presents the optical features of SG-Ⅱlaser facility and describes some of the experiments conducted on the facility.
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Key words:
- frequency tripler /
- high power laser facility /
- exploding pusher target /
- moire pattern
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