针对激光惯性约束聚变研究中的流体力学不稳定性问题,分析了x光条纹相机固有的像场畸变对惯性约束聚变研究中瑞利一泰勒不稳定性面向背光实验结果的大范围影响,利用非线性插值、非线性坐标变换及代数方法提出了针对该问题的专门的数据处理方法,并给出了一个在实际实验数据处理中的应用例子。实验表明,该方法能有效消除瑞利一泰勒不稳定性面向背光实验结果中的全局像场畸变影响。该方法结合傅里叶分析技术,较好地还原了扰动界面的真实频谱分布。
To aim at the fluid instability in inertial confinement fusion research, the research was focused on the effect of the global image distortion of X-ray streak camera on the Rayleigh-Taylor instability face-on experiments. With the aid of nonlinear interpolation, nonlinear coordinate transformation and algebraic method, a special technique for correcting this effect was put forward, and an analysis on real experimental result was made. Practical application of the method shows that the technique is effective in the image distortion correction in Rayleigh-Taylor face-on experiments. In combination with Fourier analysis technique, the method is able to restore the original frequency spectrum well.