论文部分内容阅读
面向背光照相技术是诊断惯性约束聚变(ICF)中瑞利-泰勒(RT)不稳定性的重要方法,讨论了利用该技术对球形靶丸扰动幅度测量时由于收缩几何效应带来的影响。通过计算,分析了一个简化模型下扰动振幅的实际值和测量值,讨论了偏移距离、靶丸外半径、扰动波长和扰动振幅等因素对实验结果相对误差的影响。计算表明,合理选择这些参数能使诊断的系统误差小于3%,而且可通过计算模型对测量结果进行修正。研究结果可为即将开展的神光III激光装置上的收缩几何烧蚀RT不稳定性实验参数设计和结果分析提供依据。
Backlit photography is an important method to diagnose the Rayleigh-Taylor (RT) instability in inertial confinement fusion (ICF), and the influence of shrinkage geometry on the measurement of the spherical patch disturbance is discussed. Through calculation, the actual values and measured values of disturbance amplitude under a simplified model are analyzed. The influence of offset distance, outer radius of target, disturbance wavelength and disturbance amplitude on the relative error of experimental results are discussed. The calculation shows that the reasonable selection of these parameters can make the systematic error of diagnosis less than 3%, and the measurement results can be corrected through the calculation model. The results provide the basis for the experimental design and experimental analysis of RT instability of shrinkage geometry ablation on the upcoming SG-III laser.