用光线矩阵元描述X射线激光输出特性

采用矩阵光学方法，研究了串接多靶，弯曲靶加反射镜“双程放大”Ｘ射线激光输出特性，给出了发散角普遍公式，分析了电子密度梯度分布，反射镜角失调对Ｘ射线激光输出场分布的影响，所得结果与已有实验符合较好，最后，对如何从靶，Ｘ光学元件空间排布来实现衍射极限的输出发散角提出了新的设想，作了半定量的探讨。

Analysis of Soft X-Ray Laser Output Behavior by Using Ray Matrix

Using ray matrix method, we analyse the output behavior of double-pass amplified soft X-ray laser by coupling multi-target or curved target with reflective mirror. A general formula for output divergence is derived, and the influence on output field profile resulting from electron density gradients and mirror misalignment is discussed. The theoretical calculation and the available experimentally divergence values are found being in agreement. A new scheme for generating near-diffraction-limited divergence is supposed.