铝丝阵Z箍缩辐射形成特征实验研究  

Experimental study on radiation characteristics of aluminum wire-array Z-pinches

作　　者：蒋树庆[1,2] 潘英俊[1] 甯家敏[2] 夏广新[2] 秦义[2] 叶繁[2] 薛飞彪[2] 陈法新[2] 李林波[2] 杨建伦[2] 

机构地区：[1]重庆大学光电技术及系统教育部重点实验室,重庆400044 [2]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《强激光与粒子束》2013年第7期1731-1735,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11135007;11005096)

摘　　要：基于多种诊断设备获得的物理参数和物理图像,分析了8mm铝丝阵内爆各阶段的辐射特征。实验结果表明,铝丝阵的先驱等离子体在形成后未出现明显不稳定性特征。在向心箍缩阶段,出现了泡-钉(bubble-spike)结构,并伴有局部热点。结合分析空间分辨能谱图像,表明热点的形成与等离子局部的高温高密状态有关。通过对X光条纹像进行时间和空间的定标,得到透过50μm Be膜的等离子体热点的空间尺寸约为0.8mm,持续时间小于10ns。Experimental results offered by an entire suite of diagnostics are analyzed and presented to provide a detailed pic- ture of the overall implosion process and resulting radiation output of aluminum wire array Z-pinches, including precursor radia tion during ablation, bubble spike structure, and local bright spots at stagnation. The precursor is stable after its formation. The bubble-spike structure pays a large influence on the formation of the bright spots, which can he seen at an axial position lack of trailing mass. The comparison between a fraction of spectra with spatial resolution and frame images shows that the formation of bright spots might be influenced by the high temperature and high density condition of local imploded plasma. The X-ray streak images filtered with 50μm Be show that the spatial size of hot spots is 0.8 mm and their life time is shorter than 10 ns.

关 键 词：铝丝阵 Z箍缩 等离子体 内爆辐射特征 

分 类 号：O536[理学—等离子体物理] TL65[理学—物理]