条纹形状法在线表征聚变靶丸参数  

On-Line Parameter Characterization of Fusion Capsules by Fringe Shape Analysis

作　　者：刘元琼[1] 王凯[1] 雷海乐[1] 代飞[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《光学学报》2016年第11期111-118,共8页Acta Optica Sinica

基　　金：国家自然科学基金(51006093)

摘　　要：基于低振动低温恒温器,建立了一套用于冷冻靶参数测量的马赫-曾德尔激光干涉显微系统。考虑光折射效应,推导出了靶丸光程差随入射角变化的完整表达式。在低温环境中,当燃料固化或完全气化时,分别获取了靶丸中心存在条纹时的干涉图。基于干涉条纹形状分析法,利用光程差表达式分别计算了靶丸壁厚及靶丸内燃料气体浓度。同时,用非破坏性方法对气体浓度测量结果进行了实时标定。两种方法给出的结果之间的相对误差小于5%。Based on the low-vibration cryostat,a Mach-Zehnder laser interference microscopic system used for parameter measurement of cryogenic targets is developed.With the consideration of light diffraction effect,a complete formula for describing the variation of optical-path difference with incident angle is deduced.In a low temperature environment and when the fuel solidifies or gasifies completely,the interferograms are acquired respectively with the existence of fringes at the target pellet center.With the fringe shape analysis method and the optical-path difference formula,the target pellet thickness and the fuel gas concentration within it are calculated,respectively.In addition,based on the non-destructive method,the real-time characterization of measurement results of gas concentration is conducted.The relative error between the results from the above two ways is less than5%.

关 键 词：测量 干涉法测量 燃料气体浓度 条纹形状分析 靶丸 冷冻靶 

分 类 号：O436[机械工程—光学工程]