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20TW亚皮秒激光系统(SPS)与中子产生实验研究
20 TW Sub-picosecond Laser System (SPS) Applied for the Neutron Experiment
【摘要】 利用啁啾脉冲放大技术 ,建成了一台基于钕玻璃放大器 10 5 3nm波长的亚皮秒超短脉冲激光系统 (SPS)。系统的输出峰值功率大于 2 0TW ,靶面最高能量可达 16J ,采用离轴抛物面反射镜聚焦 ,在靶面上获得 2× 10 18W /cm2 的激光功率密度 ,以此激光脉冲轰击氘化聚苯乙烯平面靶 ,获得单次发射最高 2 4× 10 4个中子产额。对中子产生的机理进行了相关的讨论
【Abstract】 A Nd∶doped-glass-based sub-picosecond laser system with the maximum peak power of greater than 20 tara watts and the energy on target surface of 16 J is accomplished by using the chirped laser pulse amplification technology. While the laser pulse is focused by an off-axis parabolic mirror, the power density on target surface of approximately 2×10 18 W/cm 2 is acquired. In the performed neutron experiment, a C 8D 8 plate target is placed on the focal spot of the off-axis parabolic mirror. The maximum neutron yield for a single shot reaches 2.4×10 4. Still some other related problems are discussed.
【Key words】 ICF; sub-picosecond ultra short laser pulse; Nd∶doped glass based amplifier; neutron yield;
- 【文献出处】 中国激光 ,Chinese Journal of Lasers , 编辑部邮箱 ,2003年10期
- 【分类号】O571.44
- 【被引频次】11
- 【下载频次】83