使用蒙特卡罗数值模拟程序研究了不同电子束和激光强度下, 尾场电子束与超短脉冲激光发生汤姆逊散射获得的X光子能谱、角分布等, 初步探索了180°散射下高质量X射线光源所需要的电子束与激光强度。数值模拟结果显示, 为了尽量提高光子产额并抑制非线性效应, 激光归一化强度应为1的量级。为了获得方向性和单色性好、亮度高的X射线脉冲, 需要较高的电子能量和较小的电子能散, 电子束脉冲尽量短, 且发散角尽量小。

The energy spectra and angle-distribution of the X-ray photons produced through 180°Thomson scattering were studied by Monte Carlo numerical simulation code CAIN. The laser intensity and electron parameters required for high quality X-ray source were also explored. Results show that to get higher photon production and suppress the nonlinear scattering, the laser intensity should not be too high. To get a monochromatic and highly luminous X-ray source, the electrons should have quasi-monoenergetic energy distributions, high energy, small divergence and short pulse length.