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含能材料  2015 

基于激光驱动的复合飞片参数与性能

DOI: 10.11943/j.issn.1006-9941.2015.02.013

Keywords: 复合飞片 光子多普勒测速仪(PDV) 飞片速度 激光驱动

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Abstract:

在激光驱动飞片技术中,复合飞片的使用可提高对激光的能量利用率,从而获得更高的速度。为进一步研究复合飞片各层参数对激光驱动飞片速度的影响,采用Ti、C、Al2O3、Al等材料制备了不同参数的复合飞片,利用小型掺钕钇铝石榴石晶体ND: YAG固体激光器在200~300 mJ能量下进行了驱动飞片试验,并通过光子多普勒测速仪(PDV)对飞片速度进行了测试。结果表明,在厚度控制合理的情况下,增加了吸收层(0.15 μm,Ti)的复合飞片最大速度较单层飞片提高了约110%,同时增加了烧蚀层(0.3 μm,Al)和隔热层(1.0 μm,Al2O3)的复合飞片最大速度较单层飞片提高了约41%,并对复合飞片的能量利用率及加速距离进行了分析,表明激光驱动复合飞片在0.02 μs左右可达到最大速度的90%,在0.08 μs左右可达到最大速度

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