用波动光学研究X射线激光传播与放大过程

Wave Optics Simulation of Propagation and Amplification of X Ray Lasers

采用放大自发辐射（ＡＳＥ）模型，利用快速傅里叶变换（ＦＦＴ）解傍轴波动方程，考虑衍射、折射和增益饱和，编制了Ｘ射线激光在多靶中传播与放大的波动光学程序ＸＷＡＶＥ，给出了Ｘ射线激光的空间分布、角分布和空间相干性的结果。

Using the fast Fourier transform (FFT) algorithm to make the solution of paraxial wave equations, we develop a x ray laser wave optics code XWAVE based on a model of amplified spontaneous emission(ASE). It includes diffraction, gain saturation, and refractive effects due to electron density gradients. The results of coherence, spatial distribution and angular distributions of x ray laser are presented, which agrees with the results of gain coefficients and angles of divergence in the multi target experiments.