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针对神光Ⅲ原型实验中出现的动态畸变现象,开展了条纹相机动态成像特性研究。结合实验图像,利用CST Particle Studio软件模拟了强信号下变像管的成像过程,结果表明:在强信号下,变像管的空间电荷效应会造成电子束聚焦点与理想成像面距离减小,使得图像的放大倍数变小,产生信号弯曲现象,并且这一现象随着电流强度的增加更为明显。
Aiming at the dynamic distortion phenomenon in SG prototype experiment, the dynamic imaging characteristics of streak camera are studied. The experimental results show that the space charge effect of the image tube can reduce the distance between the focal point of the electron beam and the ideal imaging plane under the strong signal, Making the image smaller magnification, resulting in signal bending phenomenon, and this phenomenon with the current intensity is more obvious.