流体不稳定性实验中条纹相机像场畸变的影响  

Effect of image distortion of X-ray streak camera in fluid instability experiment

作　　者：郝轶聃[1] 袁永腾[1] 缪文勇[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：《红外与激光工程》2012年第6期1503-1507,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金(10775121)

摘　　要：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-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-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.

关 键 词：像场畸变 X光条纹相机 流体力学不稳定性 图像处理 

分 类 号：TB853.21[一般工业技术—摄影技术]